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Pacific Ethanol, Inc. – ‘S-1’ on 1/21/20 – ‘EX-101.LAB’

On:  Tuesday, 1/21/20, at 4:30pm ET   ·   Accession #:  1213900-20-1457   ·   File #:  333-235990

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  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 1/21/20  Pacific Ethanol, Inc.             S-1                  134:20M                                    Edgar Agents LLC/FA

Registration Statement (General Form)   —   Form S-1
Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: S-1         Registration Statement (General Form)               HTML   1.45M 
 2: EX-5.1      Opinion of Troutman Sanders LLP                     HTML     40K 
 3: EX-10.49    Amendment No. 1 to Credit Agreement and Waiver      HTML    112K 
                Dated December 20, 2019 Among Illinois Corn                      
                Processing, LLC, Compeer Financial, Pca and                      
                Cobank, Acb                                                      
 4: EX-10.50    Amendment No. 7 to Credit Agreement and Waiver      HTML    120K 
                Dated December 20, 2019 Among Pacific Ethanol                    
                Pekin, LLC, Compeer Financial, Pca and Cobank, Acb               
 5: EX-10.51    First Amendment to Security Agreement Dated         HTML     51K 
                December 20, 2019 by and Between Illinois Corn                   
                Processing, LLC and Cobank, Acb for the Benefit of               
                Compeer Financial, Pca                                           
 6: EX-10.52    First Amendment to Security Agreement Dated         HTML     52K 
                December 20, 2019 by and Between Pacific Ethanol                 
                Central, LLC and Cobank, Acb for the Benefit of                  
                Compeer Financial, Pca                                           
 7: EX-10.53    Second Amendment to Security Agreement Dated        HTML     47K 
                December 20, 2019 by and Between Pacific Ethanol                 
                Pekin, LLC and Cobank, Acb for the Benefit of                    
                Compeer Financial, Pca                                           
 8: EX-10.54    Guaranty by Illinois Corn Processing, LLC Dated     HTML     64K 
                December 20, 2019 in Favor of Compeer Financial,                 
                Pca and Cobank, Acb                                              
 9: EX-10.55    Amended and Restated Guaranty and Contribution      HTML     72K 
                Agreement Dated December 20, 2019 by Pacific                     
                Ethanol Central, LLC for the Benefit of Compeer                  
                Financial, Pca and Cobank, Acb                                   
10: EX-10.56    Guaranty by Pacific Ethanol Pekin, LLC Dated        HTML     65K 
                December 20, 2019 in Favor of Compeer Financial,                 
                Pca and Cobank, Acb                                              
11: EX-10.57    Pledge Agreement Dated December 20, 2019 by and     HTML     87K 
                Among Pacific Ethanol Central, LLC, Pacific                      
                Ethanol Pekin, LLC and Cobank, Acb                               
12: EX-10.58    Pledge Agreement Dated December 20, 2019 by and     HTML     85K 
                Among Pacific Ethanol Central, LLC, Illinois Corn                
                Processing, LLC and Cobank, Acb                                  
13: EX-10.59    First Amendment to Pledge Agreement Dated December  HTML     50K 
                20, 2019 by and Among Pacific Ethanol Central,                   
                LLC, Pacific Aurora, LLC and Cobank, Acb                         
14: EX-10.60    Amendment to Illinois Future Advance Real Estate    HTML     56K 
                Mortgage Dated December 20, 2019 by and Between                  
                Illinois Corn Processing, LLC and Compeer                        
                Financial, Pca                                                   
15: EX-10.61    Third Amendment to Illinois Future Advance Real     HTML     57K 
                Estate Mortgage Dated December 20, 2019 by and                   
                Between Pacific Ethanol Pekin, LLC and Compeer                   
                Financial, Pca                                                   
16: EX-10.62    Amended and Restated Term Note Dated December 20,   HTML     54K 
                2019 by Illinois Corn Processing, LLC in Favor of                
                Compeer Financial, Pca                                           
17: EX-10.63    Amended and Restated Revolving Term Note Dated      HTML     56K 
                December 20, 2019 by Illinois Corn Processing, LLC               
                in Favor of Compeer Financial, Pca                               
18: EX-10.64    Third Amended and Restated Revolving Term Note      HTML     55K 
                Dated December 20, 2019 by Pacific Ethanol Pekin,                
                LLC in Favor of Compeer Financial, Pca                           
19: EX-10.65    Fourth Amended and Restated Term Note Dated         HTML     50K 
                December 20, 2019 by Pacific Ethanol Pekin, LLC in               
                Favor of Compeer Financial, Pca                                  
20: EX-23.2     Consent of Independent Registered Public            HTML     33K 
                Accounting Firm                                                  
115: R1          Document and Entity Information                     HTML     52K  
77: R2          Consolidated Balance Sheets                         HTML    163K 
37: R3          Consolidated Balance Sheets (Parenthetical)         HTML     65K 
100: R4          Consolidated Statements of Operations               HTML    100K  
113: R5          Consolidated Statements of Comprehensive Income     HTML     55K  
                (Loss)                                                           
75: R6          Consolidated Statements of Cash Flows               HTML    176K 
35: R7          Consolidated Statements of Stockholders' Equity     HTML    125K 
104: R8          Organization and Basis of Presentation.             HTML    138K  
111: R9          Pacific Ethanol Plants.                             HTML     72K  
48: R10         Inventories.                                        HTML     41K 
62: R11         Intercompany Agreements.                            HTML     48K 
132: R12         Segments.                                           HTML    103K  
93: R13         Property and Equipment.                             HTML     48K 
49: R14         Intangible Asset.                                   HTML     38K 
64: R15         Derivatives.                                        HTML     81K 
134: R16         Leases.                                             HTML     46K  
95: R17         Debt.                                               HTML     84K 
47: R18         Pension and Retirement Benefit Plans.               HTML     98K 
66: R19         Income Taxes.                                       HTML     77K 
108: R20         Preferred Stock.                                    HTML     52K  
97: R21         Common Stock and Warrants.                          HTML     49K 
27: R22         Stock-Based Compensation.                           HTML     64K 
69: R23         Commitments and Contingencies.                      HTML     66K 
109: R24         Fair Value Measurements.                            HTML     99K  
98: R25         Earnings Per Share.                                 HTML     69K 
28: R26         Parent Company Financials.                          HTML    129K 
70: R27         Quarterly Financial Data (Unaudited)                HTML     56K 
110: R28         Organization and Basis of Presentation. (Policies)  HTML    234K  
96: R29         Organization and Significant Accounting Policies.   HTML     73K 
                (Tables)                                                         
90: R30         Pacific Ethanol Plants. (Tables)                    HTML     54K 
130: R31         Inventories. (Tables)                               HTML     44K  
68: R32         Segments. (Tables)                                  HTML    104K 
52: R33         Property and Equipment. (Tables)                    HTML     46K 
89: R34         Derivatives. (Tables)                               HTML     73K 
129: R35         Leases. (Tables)                                    HTML     40K  
67: R36         Debt. (Tables)                                      HTML     64K 
51: R37         Pension Plans. (Tables)                             HTML    133K 
91: R38         Income Taxes. (Tables)                              HTML    112K 
128: R39         Common Stock and Warrants. (Tables)                 HTML     45K  
106: R40         Stock Based Compensation. (Tables)                  HTML     67K  
120: R41         Commitments and Contingencies. (Tables)             HTML     42K  
72: R42         Fair Value Measurements. (Tables)                   HTML     90K 
30: R43         Earnings Per Share. (Tables)                        HTML     71K 
105: R44         Parent Company Financials. (Tables)                 HTML    152K  
119: R45         Quarterly Financial Data. (Tables)                  HTML     56K  
71: R46         Organization and Basis of Presentation. (Details)   HTML     41K 
29: R47         Organization and Basis of Presentation. (Details    HTML     45K 
                1)                                                               
107: R48         Organization and Basis of Presentation. (Details    HTML     52K  
                2)                                                               
118: R49         Organization and Basis of Presentation. (Details    HTML     43K  
                3)                                                               
125: R50         Organization and Basis of Presentation. (Details    HTML     86K  
                4)                                                               
87: R51         Organization and Basis of Presentation. (Details    HTML    108K 
                Narrative)                                                       
39: R52         Pacific Ethanol Plants. (Details)                   HTML     83K 
54: R53         Pacific Ethanol Plants. (Details 1)                 HTML     45K 
126: R54         Pacific Ethanol Plants. (Details Narrative)         HTML     83K  
88: R55         Inventories. (Details)                              HTML     52K 
40: R56         Inventories. (Details Narrative)                    HTML     37K 
55: R57         Intercompany Agreements. (Details Narrative)        HTML     70K 
127: R58         Segments. (Details)                                 HTML     93K  
86: R59         Segments. (Details 1)                               HTML     42K 
34: R60         Segments. (Details Narrative)                       HTML     40K 
74: R61         Property and Equipment. (Details)                   HTML     51K 
114: R62         Property and Equipment. (Details Narrative)         HTML     39K  
101: R63         Intangible Asset. (Details Narrative)               HTML     39K  
36: R64         Derivatives. (Details)                              HTML     42K 
76: R65         Derivatives. (Details 1)                            HTML     46K 
116: R66         Derivatives. (Details Narrative)                    HTML     38K  
102: R67         Leases. (Details)                                   HTML     61K  
32: R68         Leases. (Details Narrative)                         HTML     52K 
80: R69         Debt. (Details)                                     HTML     76K 
60: R70         Debt. (Details 1)                                   HTML     54K 
43: R71         Debt. (Details Narrative)                           HTML    229K 
83: R72         Pension Plans. (Details)                            HTML     88K 
123: R73         Pension Plans. (Details 1)                          HTML     49K  
59: R74         Pension Plans. (Details 2)                          HTML     52K 
42: R75         Pension Plans. (Details 3)                          HTML     66K 
82: R76         Pension Plans. (Details 4)                          HTML     49K 
122: R77         Pension Plans. (Details Narrative)                  HTML     46K  
56: R78         Income Taxes. (Details)                             HTML     46K 
45: R79         Income Taxes. (Details 1)                           HTML     68K 
61: R80         Income Taxes. (Details 2)                           HTML     83K 
44: R81         Income Taxes. (Details 3)                           HTML     49K 
85: R82         Income Taxes. (Details 4)                           HTML     49K 
124: R83         Income Taxes. (Details 5)                           HTML     58K  
58: R84         Income Taxes. (Details Narrative)                   HTML     66K 
41: R85         Preferred Stock. (Details Narrative)                HTML     55K 
81: R86         Common Stock and Warrants. (Details)                HTML     64K 
121: R87         Common Stock and Warrants. (Details Narrative)      HTML     48K  
57: R88         Stock-Based Compensation. (Details)                 HTML     54K 
46: R89         Stock-Based Compensation. (Details 1)               HTML     51K 
33: R90         Stock-Based Compensation. (Details 2)               HTML     61K 
73: R91         Stock-Based Compensation. (Details 3)               HTML     40K 
112: R92         Stock-Based Compensation. (Details Narrative)       HTML     52K  
99: R93         Commitments and Contingencies. (Details)            HTML     81K 
38: R94         Commitments and Contingencies. (Details Narrative)  HTML    102K 
78: R95         Pension and Retirement Benefit Plans. (Details)     HTML     47K 
117: R96         Pension and Retirement Benefit Plans. (Details 1)   HTML     47K  
103: R97         Pension and Retirement Benefit Plans. (Details      HTML     44K  
                Narrative)                                                       
31: R98         Fair Value Measurements. (Details)                  HTML    102K 
79: R99         Earnings Per Share. (Details)                       HTML     62K 
133: R100        Earnings Per Share. (Details Narrative)             HTML     38K  
94: R101        Parent Company Financials. (Details)                HTML    143K 
50: R102        Parent Company Financials. (Details 1)              HTML     86K 
65: R103        Parent Company Financials. (Details 2)              HTML    152K 
131: R104        Parent Company Financials. (Details Narrative)      HTML     38K  
92: R105        Quarterly Financial Data (Unaudited) (Details)      HTML     60K 
84: XML         IDEA XML File -- Filing Summary                      XML    230K 
53: EXCEL       IDEA Workbook of Financial Reports                  XLSX    150K 
21: EX-101.INS  XBRL Instance -- peix-20190930                       XML   3.92M 
23: EX-101.CAL  XBRL Calculations -- peix-20190930_cal               XML    292K 
24: EX-101.DEF  XBRL Definitions -- peix-20190930_def                XML   1.20M 
25: EX-101.LAB  XBRL Labels -- peix-20190930_lab                     XML   1.75M 
26: EX-101.PRE  XBRL Presentations -- peix-20190930_pre              XML   1.50M 
22: EX-101.SCH  XBRL Schema -- peix-20190930                         XSD    289K 
63: ZIP         XBRL Zipped Folder -- 0001213900-20-001457-xbrl      Zip    283K

‘EX-101.LAB’   —   XBRL Labels — peix-20190930_lab

This Exhibit is an XBRL XML File.

                                                                                                                                                                                
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<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis_lbl" xml:lang="en-US"> Concentration Risk Benchmark [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SalesMember" xlink:label="us-gaap_SalesMember"/>
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<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SalesMember_lbl" xml:lang="en-US"> Sales [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MajorCustomersAxis" xlink:label="srt_MajorCustomersAxis"/>
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<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_MajorCustomersAxis_lbl" xml:lang="en-US"> Customer [Axis] </link:label>
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<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_CustomeraMember_lbl" xml:lang="en-US"> Customer A [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_CustomerbMember" xlink:label="peix_CustomerbMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CustomerbMember" xlink:to="peix_CustomerbMember_lbl" xlink:type="arc"/>
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<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostOfGoodsTotalMember_lbl" xml:lang="en-US"> Purchases [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="us-gaap_ConcentrationRiskByTypeAxis"/>
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<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_SupplierCMember" xlink:to="peix_SupplierCMember_lbl" xlink:type="arc"/>
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<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BuildingMember_lbl" xml:lang="en-US"> Building [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_FacilitiesAndPlanEquipmentMember" xlink:label="peix_FacilitiesAndPlanEquipmentMember"/>
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<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_FacilitiesAndPlanEquipmentMember_lbl" xml:lang="en-US"> Facilities and plant equipment [Member] </link:label>
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<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeAxis" xlink:to="srt_RangeAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_RangeAxis_lbl" xml:lang="en-US"> Range [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MinimumMember" xlink:to="srt_MinimumMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_MinimumMember_lbl" xml:lang="en-US"> Minimum [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MaximumMember" xlink:to="srt_MaximumMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_MaximumMember_lbl" xml:lang="en-US"> Maximum [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherMachineryAndEquipmentMember" xlink:label="us-gaap_OtherMachineryAndEquipmentMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherMachineryAndEquipmentMember" xlink:to="us-gaap_OtherMachineryAndEquipmentMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherMachineryAndEquipmentMember_lbl" xml:lang="en-US"> Other equipment, vehicles and furniture [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ConsolidatedEntitiesAxis" xlink:label="srt_ConsolidatedEntitiesAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ConsolidatedEntitiesAxis" xlink:to="srt_ConsolidatedEntitiesAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_ConsolidatedEntitiesAxis_lbl" xml:lang="en-US"> Consolidated Entities [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_PacificAuroraMember" xlink:label="peix_PacificAuroraMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PacificAuroraMember" xlink:to="peix_PacificAuroraMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_PacificAuroraMember_lbl" xml:lang="en-US"> Pacific Aurora [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis" xlink:label="dei_LegalEntityAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LegalEntityAxis" xlink:to="dei_LegalEntityAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_LegalEntityAxis_lbl" xml:lang="en-US"> Legal Entity [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_AuroraCoopElevatorMember" xlink:label="peix_AuroraCoopElevatorMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_AuroraCoopElevatorMember" xlink:to="peix_AuroraCoopElevatorMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_AuroraCoopElevatorMember_lbl" xml:lang="en-US"> ACEC [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_OwnershipAxis" xlink:label="srt_OwnershipAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_OwnershipAxis" xlink:to="srt_OwnershipAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_OwnershipAxis_lbl" xml:lang="en-US"> Ownership [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_CustomerAAndBMember" xlink:label="peix_CustomerAAndBMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CustomerAAndBMember" xlink:to="peix_CustomerAAndBMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_CustomerAAndBMember_lbl" xml:lang="en-US"> Customer A and B [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="us-gaap_BusinessAcquisitionAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionAxis" xlink:to="us-gaap_BusinessAcquisitionAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionAxis_lbl" xml:lang="en-US"> Business Acquisition [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ICPMember" xlink:label="peix_ICPMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ICPMember" xlink:to="peix_ICPMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_ICPMember_lbl" xml:lang="en-US"> ICP [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_PECentralMember" xlink:label="peix_PECentralMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PECentralMember" xlink:to="peix_PECentralMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_PECentralMember_lbl" xml:lang="en-US"> PE Central [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TypeOfArrangementAxis" xlink:label="us-gaap_TypeOfArrangementAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TypeOfArrangementAxis" xlink:to="us-gaap_TypeOfArrangementAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xml:lang="en-US"> Type of Arrangement and Non-arrangement Transactions [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_AffiliateManagementAgreementMember" xlink:label="peix_AffiliateManagementAgreementMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_AffiliateManagementAgreementMember" xlink:to="peix_AffiliateManagementAgreementMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_AffiliateManagementAgreementMember_lbl" xml:lang="en-US"> Affiliate Management Agreement [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_EthanolMarketingAgreementMember" xlink:label="peix_EthanolMarketingAgreementMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolMarketingAgreementMember" xlink:to="peix_EthanolMarketingAgreementMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_EthanolMarketingAgreementMember_lbl" xml:lang="en-US"> Ethanol Marketing Agreement [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xml:lang="en-US"> Related Party [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_KinergyMarketingMember" xlink:label="peix_KinergyMarketingMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_KinergyMarketingMember" xlink:to="peix_KinergyMarketingMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_KinergyMarketingMember_lbl" xml:lang="en-US"> Kinergy Marketing LLC [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_CornProcurementAgreementMember" xlink:label="peix_CornProcurementAgreementMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CornProcurementAgreementMember" xlink:to="peix_CornProcurementAgreementMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_CornProcurementAgreementMember_lbl" xml:lang="en-US"> Corn Procurement and Handling Agreement [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_PacificAgProductsMember" xlink:label="peix_PacificAgProductsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PacificAgProductsMember" xlink:to="peix_PacificAgProductsMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_PacificAgProductsMember_lbl" xml:lang="en-US"> Pacific Ag. Products, LLC [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_NewGrainProcurementAgreementMember" xlink:label="peix_NewGrainProcurementAgreementMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_NewGrainProcurementAgreementMember" xlink:to="peix_NewGrainProcurementAgreementMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_NewGrainProcurementAgreementMember_lbl" xml:lang="en-US"> New Grain Procurement Agreement [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DistillersGrainsMarketingAgreementsMember" xlink:label="peix_DistillersGrainsMarketingAgreementsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DistillersGrainsMarketingAgreementsMember" xlink:to="peix_DistillersGrainsMarketingAgreementsMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DistillersGrainsMarketingAgreementsMember_lbl" xml:lang="en-US"> Distillers Grains Marketing Agreements [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_KinergyMarketingLLCMember" xlink:label="peix_KinergyMarketingLLCMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_KinergyMarketingLLCMember" xlink:to="peix_KinergyMarketingLLCMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="peix_KinergyMarketingLLCMember_lbl" xml:lang="en-US"> Kinergy Marketing LLC [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CreditFacilityAxis_lbl" xml:lang="en-US"> Credit Facility [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditMember" xlink:label="us-gaap_LineOfCreditMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditMember" xlink:to="us-gaap_LineOfCreditMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditMember_lbl" xml:lang="en-US"> Line of Credit [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_PacificEthanolPekinIncMember" xlink:label="peix_PacificEthanolPekinIncMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PacificEthanolPekinIncMember" xlink:to="peix_PacificEthanolPekinIncMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_PacificEthanolPekinIncMember_lbl" xml:lang="en-US"> Pacific Ethanol Pekin, Inc [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentAxis_lbl" xml:lang="en-US"> Debt Instrument [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_TermLoanMember" xlink:label="peix_TermLoanMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_TermLoanMember" xlink:to="peix_TermLoanMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_TermLoanMember_lbl" xml:lang="en-US"> Term Loan [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="us-gaap_RevolvingCreditFacilityMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevolvingCreditFacilityMember" xlink:to="us-gaap_RevolvingCreditFacilityMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RevolvingCreditFacilityMember_lbl" xml:lang="en-US"> Revolving Credit Facility [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_IllinoisCornProcessingLLCMember" xlink:label="peix_IllinoisCornProcessingLLCMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IllinoisCornProcessingLLCMember" xlink:to="peix_IllinoisCornProcessingLLCMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_IllinoisCornProcessingLLCMember_lbl" xml:lang="en-US"> Illinois Corn Processing, LLC [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ParentNotesPayableMember" xlink:label="peix_ParentNotesPayableMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ParentNotesPayableMember" xlink:to="peix_ParentNotesPayableMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_ParentNotesPayableMember_lbl" xml:lang="en-US"> Parent Notes Payable [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_PacificAgProductsLLCMember" xlink:label="peix_PacificAgProductsLLCMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PacificAgProductsLLCMember" xlink:to="peix_PacificAgProductsLLCMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="peix_PacificAgProductsLLCMember_lbl" xml:lang="en-US"> Pacific Ag. Products, LLC [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_CreditAgreementMember" xlink:label="peix_CreditAgreementMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CreditAgreementMember" xlink:to="peix_CreditAgreementMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_CreditAgreementMember_lbl" xml:lang="en-US"> Credit Agreement [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityAxis" xlink:label="us-gaap_LineOfCreditFacilityAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityAxis" xlink:to="us-gaap_LineOfCreditFacilityAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityAxis_lbl" xml:lang="en-US"> Lender Name [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_FarmCredit1stServicesMember" xlink:label="peix_FarmCredit1stServicesMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_FarmCredit1stServicesMember" xlink:to="peix_FarmCredit1stServicesMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_FarmCredit1stServicesMember_lbl" xml:lang="en-US"> 1st Farm Credit Services [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_AmendmentCreditAgreementMember" xlink:label="peix_AmendmentCreditAgreementMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_AmendmentCreditAgreementMember" xlink:to="peix_AmendmentCreditAgreementMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_AmendmentCreditAgreementMember_lbl" xml:lang="en-US"> Amendment Credit Agreement [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_NotePurchaseAgreementMember" xlink:label="peix_NotePurchaseAgreementMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_NotePurchaseAgreementMember" xlink:to="peix_NotePurchaseAgreementMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_NotePurchaseAgreementMember_lbl" xml:lang="en-US"> Note Purchase Agreement [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_FiveAccreditedInvestorsMember" xlink:label="peix_FiveAccreditedInvestorsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_FiveAccreditedInvestorsMember" xlink:to="peix_FiveAccreditedInvestorsMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_FiveAccreditedInvestorsMember_lbl" xml:lang="en-US"> Five Accredited Investors [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NotesPayableOtherPayablesMember" xlink:label="us-gaap_NotesPayableOtherPayablesMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NotesPayableOtherPayablesMember" xlink:to="us-gaap_NotesPayableOtherPayablesMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NotesPayableOtherPayablesMember_lbl" xml:lang="en-US"> Notes Payable [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_SecondNotePurchaseAgreementMember" xlink:label="peix_SecondNotePurchaseAgreementMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_SecondNotePurchaseAgreementMember" xlink:to="peix_SecondNotePurchaseAgreementMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_SecondNotePurchaseAgreementMember_lbl" xml:lang="en-US"> Second Note Purchase Agreement [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_NotesPayableOtherPayables1Member" xlink:label="peix_NotesPayableOtherPayables1Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_NotesPayableOtherPayables1Member" xlink:to="peix_NotesPayableOtherPayables1Member_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_NotesPayableOtherPayables1Member_lbl" xml:lang="en-US"> Total Notes Payable [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_TermLoan1Member" xlink:label="peix_TermLoan1Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_TermLoan1Member" xlink:to="peix_TermLoan1Member_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_TermLoan1Member_lbl" xml:lang="en-US"> A-1 Term Loan (Pacific Ethanol West Plants' Term Debt) [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_PacificAuroraLineOfCreditMember" xlink:label="peix_PacificAuroraLineOfCreditMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PacificAuroraLineOfCreditMember" xlink:to="peix_PacificAuroraLineOfCreditMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_PacificAuroraLineOfCreditMember_lbl" xml:lang="en-US"> Pacific Aurora Line of Credit [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="us-gaap_FinancialInstrumentAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_FinancialInstrumentAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FinancialInstrumentAxis_lbl" xml:lang="en-US"> Financial Instrument [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DerivativeFinancialInstrumentMember" xlink:label="peix_DerivativeFinancialInstrumentMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DerivativeFinancialInstrumentMember" xlink:to="peix_DerivativeFinancialInstrumentMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DerivativeFinancialInstrumentMember_lbl" xml:lang="en-US"> Derivative Financial Instrument [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xml:lang="en-US"> Fair Value, Hierarchy [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="us-gaap_FairValueInputsLevel1Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel1Member" xlink:to="us-gaap_FairValueInputsLevel1Member_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xml:lang="en-US"> Level 1 [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="us-gaap_FairValueInputsLevel2Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel2Member" xlink:to="us-gaap_FairValueInputsLevel2Member_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xml:lang="en-US"> Level 2 [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="us-gaap_FairValueInputsLevel3Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel3Member" xlink:to="us-gaap_FairValueInputsLevel3Member_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xml:lang="en-US"> Level 3 [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DefinedBenefitPlanAssetsLargeMember" xlink:label="peix_DefinedBenefitPlanAssetsLargeMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DefinedBenefitPlanAssetsLargeMember" xlink:to="peix_DefinedBenefitPlanAssetsLargeMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DefinedBenefitPlanAssetsLargeMember_lbl" xml:lang="en-US"> Defined Benefit Plan Assets Large U.S. Equity [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DefinedBenefitPlanAssetsMidMember" xlink:label="peix_DefinedBenefitPlanAssetsMidMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DefinedBenefitPlanAssetsMidMember" xlink:to="peix_DefinedBenefitPlanAssetsMidMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DefinedBenefitPlanAssetsMidMember_lbl" xml:lang="en-US"> Defined Benefit Plan Assets Small/Mid U.S. Equity [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DefinedBenefitPlanAssetsIntlMember" xlink:label="peix_DefinedBenefitPlanAssetsIntlMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DefinedBenefitPlanAssetsIntlMember" xlink:to="peix_DefinedBenefitPlanAssetsIntlMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DefinedBenefitPlanAssetsIntlMember_lbl" xml:lang="en-US"> Defined Benefit Plan Assets International Equity [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DefinedBenefitPlanAssetsFixedIncomeMember" xlink:label="peix_DefinedBenefitPlanAssetsFixedIncomeMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DefinedBenefitPlanAssetsFixedIncomeMember" xlink:to="peix_DefinedBenefitPlanAssetsFixedIncomeMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DefinedBenefitPlanAssetsFixedIncomeMember_lbl" xml:lang="en-US"> Defined Benefit Plan Assets Fixed Income [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetirementPlanNameAxis" xlink:label="us-gaap_RetirementPlanNameAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetirementPlanNameAxis" xlink:to="us-gaap_RetirementPlanNameAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RetirementPlanNameAxis_lbl" xml:lang="en-US"> Retirement Plan Name [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_PostretirementPlanMember" xlink:label="peix_PostretirementPlanMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PostretirementPlanMember" xlink:to="peix_PostretirementPlanMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_PostretirementPlanMember_lbl" xml:lang="en-US"> Postretirement Plan [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_StatementClassOfStockAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xml:lang="en-US"> Class of Stock [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SeriesAPreferredStockMember" xlink:label="us-gaap_SeriesAPreferredStockMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SeriesAPreferredStockMember" xlink:to="us-gaap_SeriesAPreferredStockMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SeriesAPreferredStockMember_lbl" xml:lang="en-US"> Series A Preferred Stock [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SeriesBPreferredStockMember" xlink:label="us-gaap_SeriesBPreferredStockMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SeriesBPreferredStockMember" xlink:to="us-gaap_SeriesBPreferredStockMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SeriesBPreferredStockMember_lbl" xml:lang="en-US"> Series B Preferred Stock [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NonvotingCommonStockMember" xlink:label="us-gaap_NonvotingCommonStockMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NonvotingCommonStockMember" xlink:to="us-gaap_NonvotingCommonStockMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NonvotingCommonStockMember_lbl" xml:lang="en-US"> Nonvoting Common Stock [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="us-gaap_StatementBusinessSegmentsAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementBusinessSegmentsAxis" xlink:to="us-gaap_StatementBusinessSegmentsAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementBusinessSegmentsAxis_lbl" xml:lang="en-US"> StatementBusinessSegments [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_EthanolProductionMember" xlink:label="peix_EthanolProductionMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolProductionMember" xlink:to="peix_EthanolProductionMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_EthanolProductionMember_lbl" xml:lang="en-US"> Ethanol Production [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsegmentsAxis" xlink:label="us-gaap_SubsegmentsAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsegmentsAxis" xlink:to="us-gaap_SubsegmentsAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsegmentsAxis_lbl" xml:lang="en-US"> Subsegments [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_EthanolalcoholMember" xlink:label="peix_EthanolalcoholMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolalcoholMember" xlink:to="peix_EthanolalcoholMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_EthanolalcoholMember_lbl" xml:lang="en-US"> Ethanol alcohol [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_CoproductSalesMember" xlink:label="peix_CoproductSalesMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CoproductSalesMember" xlink:to="peix_CoproductSalesMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_CoproductSalesMember_lbl" xml:lang="en-US"> Co-product sales [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_IntersegmentSalesMember" xlink:label="peix_IntersegmentSalesMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IntersegmentSalesMember" xlink:to="peix_IntersegmentSalesMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_IntersegmentSalesMember_lbl" xml:lang="en-US"> Intersegment Sales [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_MarketingAndDistributionMember" xlink:label="peix_MarketingAndDistributionMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_MarketingAndDistributionMember" xlink:to="peix_MarketingAndDistributionMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_MarketingAndDistributionMember_lbl" xml:lang="en-US"> Marketing And Distribution [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_EthanolalcoholSalesGrossMember" xlink:label="peix_EthanolalcoholSalesGrossMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolalcoholSalesGrossMember" xlink:to="peix_EthanolalcoholSalesGrossMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_EthanolalcoholSalesGrossMember_lbl" xml:lang="en-US"> Ethanol alcohol Sales Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_MarketingAndDistributionMember" xlink:to="peix_MarketingAndDistributionMember_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="peix_MarketingAndDistributionMember_2_lbl" xml:lang="en-US"> Marketing and Distribution [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_EthanolalcoholSalesNetMember" xlink:label="peix_EthanolalcoholSalesNetMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolalcoholSalesNetMember" xlink:to="peix_EthanolalcoholSalesNetMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_EthanolalcoholSalesNetMember_lbl" xml:lang="en-US"> Ethanol alcohol Sales Net Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_MarketingMember" xlink:label="peix_MarketingMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_MarketingMember" xlink:to="peix_MarketingMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_MarketingMember_lbl" xml:lang="en-US"> Marketing [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsegmentsConsolidationItemsAxis" xlink:label="us-gaap_SubsegmentsConsolidationItemsAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsegmentsConsolidationItemsAxis" xlink:to="us-gaap_SubsegmentsConsolidationItemsAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsegmentsConsolidationItemsAxis_lbl" xml:lang="en-US"> Subsegments Consolidation Items [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IntersubsegmentEliminationsMember" xlink:label="us-gaap_IntersubsegmentEliminationsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IntersubsegmentEliminationsMember" xlink:to="us-gaap_IntersubsegmentEliminationsMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IntersubsegmentEliminationsMember_lbl" xml:lang="en-US"> Intersubsegment Eliminations [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_CorporateActivitiesMember" xlink:label="peix_CorporateActivitiesMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CorporateActivitiesMember" xlink:to="peix_CorporateActivitiesMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_CorporateActivitiesMember_lbl" xml:lang="en-US"> Corporate Activities [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_CorporateAssetsMember" xlink:label="peix_CorporateAssetsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CorporateAssetsMember" xlink:to="peix_CorporateAssetsMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_CorporateAssetsMember_lbl" xml:lang="en-US"> Corporate Assets [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_FacilitiesAndPlantEquipmentMember" xlink:label="peix_FacilitiesAndPlantEquipmentMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_FacilitiesAndPlantEquipmentMember" xlink:to="peix_FacilitiesAndPlantEquipmentMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_FacilitiesAndPlantEquipmentMember_lbl" xml:lang="en-US"> Facilities And Plant Equipment [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LandMember" xlink:label="us-gaap_LandMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LandMember" xlink:to="us-gaap_LandMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LandMember_lbl" xml:lang="en-US"> Land [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherMachineryAndEquipmentMember" xlink:to="us-gaap_OtherMachineryAndEquipmentMember_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OtherMachineryAndEquipmentMember_2_lbl" xml:lang="en-US"> Other Equipment, Vehicles and Furniture [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConstructionInProgressMember" xlink:label="us-gaap_ConstructionInProgressMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConstructionInProgressMember" xlink:to="us-gaap_ConstructionInProgressMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConstructionInProgressMember_lbl" xml:lang="en-US"> Construction in Progress [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_CapitalInvestmentActivitiesMember" xlink:label="peix_CapitalInvestmentActivitiesMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CapitalInvestmentActivitiesMember" xlink:to="peix_CapitalInvestmentActivitiesMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_CapitalInvestmentActivitiesMember_lbl" xml:lang="en-US"> Capital Investment Activities [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:to="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_lbl" xml:lang="en-US"> Indefinite-lived Intangible Assets [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TradeNamesMember" xlink:label="us-gaap_TradeNamesMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TradeNamesMember" xlink:to="us-gaap_TradeNamesMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TradeNamesMember_lbl" xml:lang="en-US"> Trade Names [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HedgingDesignationAxis" xlink:label="us-gaap_HedgingDesignationAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_HedgingDesignationAxis" xlink:to="us-gaap_HedgingDesignationAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_HedgingDesignationAxis_lbl" xml:lang="en-US"> Hedging Designation [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NondesignatedMember" xlink:label="us-gaap_NondesignatedMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NondesignatedMember" xlink:to="us-gaap_NondesignatedMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NondesignatedMember_lbl" xml:lang="en-US"> Non Designated Derivative Instruments [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeInstrumentRiskAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeInstrumentRiskAxis_lbl" xml:lang="en-US"> Derivative Instrument Risk [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_CashCollateralBalanceMember" xlink:label="peix_CashCollateralBalanceMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CashCollateralBalanceMember" xlink:to="peix_CashCollateralBalanceMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_CashCollateralBalanceMember_lbl" xml:lang="en-US"> Cash Collateral Balance [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommodityContractMember" xlink:label="us-gaap_CommodityContractMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommodityContractMember" xlink:to="us-gaap_CommodityContractMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommodityContractMember_lbl" xml:lang="en-US"> Commodity Contracts [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeInstrumentRiskAxis_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DerivativeInstrumentRiskAxis_2_lbl" xml:lang="en-US"> Derivative Instrument [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="us-gaap_IncomeStatementLocationAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeStatementLocationAxis_lbl" xml:lang="en-US"> Income Statement Location [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostOfSalesMember" xlink:label="us-gaap_CostOfSalesMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfSalesMember" xlink:to="us-gaap_CostOfSalesMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostOfSalesMember_lbl" xml:lang="en-US"> Cost of goods sold [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_RetirementPlanMember" xlink:label="peix_RetirementPlanMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_RetirementPlanMember" xlink:to="peix_RetirementPlanMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_RetirementPlanMember_lbl" xml:lang="en-US"> Retirement Plan [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="us-gaap_IncomeTaxAuthorityAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxAuthorityAxis" xlink:to="us-gaap_IncomeTaxAuthorityAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxAuthorityAxis_lbl" xml:lang="en-US"> Income Tax Authority [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StateAndLocalJurisdictionMember" xlink:label="us-gaap_StateAndLocalJurisdictionMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StateAndLocalJurisdictionMember" xlink:to="us-gaap_StateAndLocalJurisdictionMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StateAndLocalJurisdictionMember_lbl" xml:lang="en-US"> State [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TaxPeriodAxis" xlink:label="us-gaap_TaxPeriodAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxPeriodAxis" xlink:to="us-gaap_TaxPeriodAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TaxPeriodAxis_lbl" xml:lang="en-US"> Tax Period [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_Period3Member" xlink:label="peix_Period3Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Period3Member" xlink:to="peix_Period3Member_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_Period3Member_lbl" xml:lang="en-US"> 2029-2033 [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DomesticCountryMember" xlink:label="us-gaap_DomesticCountryMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DomesticCountryMember" xlink:to="us-gaap_DomesticCountryMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DomesticCountryMember_lbl" xml:lang="en-US"> Federal [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_Year2020Member" xlink:label="peix_Year2020Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Year2020Member" xlink:to="peix_Year2020Member_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_Year2020Member_lbl" xml:lang="en-US"> 2020 [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_Year2019Member" xlink:label="peix_Year2019Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Year2019Member" xlink:to="peix_Year2019Member_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_Year2019Member_lbl" xml:lang="en-US"> 2019 [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_Year2021Member" xlink:label="peix_Year2021Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Year2021Member" xlink:to="peix_Year2021Member_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_Year2021Member_lbl" xml:lang="en-US"> 2021 [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_Year2022Member" xlink:label="peix_Year2022Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Year2022Member" xlink:to="peix_Year2022Member_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_Year2022Member_lbl" xml:lang="en-US"> 2022 [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_Year2023Member" xlink:label="peix_Year2023Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Year2023Member" xlink:to="peix_Year2023Member_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_Year2023Member_lbl" xml:lang="en-US"> 2023 [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_USTreasuryAndGovernmentMember" xlink:label="us-gaap_USTreasuryAndGovernmentMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_USTreasuryAndGovernmentMember" xlink:to="us-gaap_USTreasuryAndGovernmentMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_USTreasuryAndGovernmentMember_lbl" xml:lang="en-US"> US Treasury and Government [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ArizonaMember" xlink:label="peix_ArizonaMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ArizonaMember" xlink:to="peix_ArizonaMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_ArizonaMember_lbl" xml:lang="en-US"> Arizona [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_CaliforniaMember" xlink:label="peix_CaliforniaMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CaliforniaMember" xlink:to="peix_CaliforniaMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_CaliforniaMember_lbl" xml:lang="en-US"> California [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ColoradoMember" xlink:label="peix_ColoradoMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ColoradoMember" xlink:to="peix_ColoradoMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_ColoradoMember_lbl" xml:lang="en-US"> Colorado [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_IdahoMember" xlink:label="peix_IdahoMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IdahoMember" xlink:to="peix_IdahoMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_IdahoMember_lbl" xml:lang="en-US"> Idaho [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_IllinoisMember" xlink:label="peix_IllinoisMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IllinoisMember" xlink:to="peix_IllinoisMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_IllinoisMember_lbl" xml:lang="en-US"> Illinois [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_IndianaMember" xlink:label="peix_IndianaMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IndianaMember" xlink:to="peix_IndianaMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_IndianaMember_lbl" xml:lang="en-US"> Indiana [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_IowaMember" xlink:label="peix_IowaMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IowaMember" xlink:to="peix_IowaMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_IowaMember_lbl" xml:lang="en-US"> Iowa [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_KansasMember" xlink:label="peix_KansasMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_KansasMember" xlink:to="peix_KansasMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_KansasMember_lbl" xml:lang="en-US"> Kansas [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_MinnesotaMember" xlink:label="peix_MinnesotaMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_MinnesotaMember" xlink:to="peix_MinnesotaMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_MinnesotaMember_lbl" xml:lang="en-US"> Minnesota [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_MissouriMember" xlink:label="peix_MissouriMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_MissouriMember" xlink:to="peix_MissouriMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_MissouriMember_lbl" xml:lang="en-US"> Missouri [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_NebraskaMember" xlink:label="peix_NebraskaMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_NebraskaMember" xlink:to="peix_NebraskaMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_NebraskaMember_lbl" xml:lang="en-US"> Nebraska [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_OklahomaMember" xlink:label="peix_OklahomaMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_OklahomaMember" xlink:to="peix_OklahomaMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_OklahomaMember_lbl" xml:lang="en-US"> Oklahoma [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_OregonMember" xlink:label="peix_OregonMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_OregonMember" xlink:to="peix_OregonMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_OregonMember_lbl" xml:lang="en-US"> Oregon [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_TexasMember" xlink:label="peix_TexasMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_TexasMember" xlink:to="peix_TexasMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_TexasMember_lbl" xml:lang="en-US"> Texas [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfWarrantOrRightAxis" xlink:label="us-gaap_ClassOfWarrantOrRightAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ClassOfWarrantOrRightAxis_lbl" xml:lang="en-US"> ClassOfWarrantOrRight [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WarrantMember" xlink:label="us-gaap_WarrantMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WarrantMember" xlink:to="us-gaap_WarrantMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WarrantMember_lbl" xml:lang="en-US"> Warrants [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="us-gaap_AwardTypeAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_AwardTypeAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AwardTypeAxis_lbl" xml:lang="en-US"> AwardType [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockOptionMember" xlink:label="us-gaap_StockOptionMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockOptionMember" xlink:to="us-gaap_StockOptionMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockOptionMember_lbl" xml:lang="en-US"> Stock Options [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis" xlink:to="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_lbl" xml:lang="en-US"> ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_StockOptionAwardTwoMember" xlink:label="peix_StockOptionAwardTwoMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_StockOptionAwardTwoMember" xlink:to="peix_StockOptionAwardTwoMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_StockOptionAwardTwoMember_lbl" xml:lang="en-US"> $12.90 </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_StockOptionAwardOneMember" xlink:label="peix_StockOptionAwardOneMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_StockOptionAwardOneMember" xlink:to="peix_StockOptionAwardOneMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_StockOptionAwardOneMember_lbl" xml:lang="en-US"> $3.74 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedStockMember" xlink:label="us-gaap_RestrictedStockMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedStockMember" xlink:to="us-gaap_RestrictedStockMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RestrictedStockMember_lbl" xml:lang="en-US"> Restricted Stock </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis" xlink:to="us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis_lbl" xml:lang="en-US"> Type of Deferred Compensation [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_EmployeesMember" xlink:label="peix_EmployeesMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EmployeesMember" xlink:to="peix_EmployeesMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_EmployeesMember_lbl" xml:lang="en-US"> Employees [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_NonEmployeesMember" xlink:label="peix_NonEmployeesMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_NonEmployeesMember" xlink:to="peix_NonEmployeesMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_NonEmployeesMember_lbl" xml:lang="en-US"> Non-Employees [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="us-gaap_PlanNameAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PlanNameAxis" xlink:to="us-gaap_PlanNameAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PlanNameAxis_lbl" xml:lang="en-US"> Plan Name [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_Plan2006Member" xlink:label="peix_Plan2006Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Plan2006Member" xlink:to="peix_Plan2006Member_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_Plan2006Member_lbl" xml:lang="en-US"> 2006 Stock Incentive Plan [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_Plan2016Member" xlink:label="peix_Plan2016Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Plan2016Member" xlink:to="peix_Plan2016Member_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_Plan2016Member_lbl" xml:lang="en-US"> 2016 Stock Incentive Plan [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ParentCompanyMember" xlink:label="srt_ParentCompanyMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ParentCompanyMember" xlink:to="srt_ParentCompanyMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_ParentCompanyMember_lbl" xml:lang="en-US"> Parent Company [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherCommitmentsAxis" xlink:label="us-gaap_OtherCommitmentsAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherCommitmentsAxis" xlink:to="us-gaap_OtherCommitmentsAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherCommitmentsAxis_lbl" xml:lang="en-US"> Other Commitments [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_WesternSugarMember" xlink:label="peix_WesternSugarMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WesternSugarMember" xlink:to="peix_WesternSugarMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_WesternSugarMember_lbl" xml:lang="en-US"> Western Sugar Contract [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_EthanolContractMember" xlink:label="peix_EthanolContractMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolContractMember" xlink:to="peix_EthanolContractMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_EthanolContractMember_lbl" xml:lang="en-US"> Ethanol contracts [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_CoProductContractsMember" xlink:label="peix_CoProductContractsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CoProductContractsMember" xlink:to="peix_CoProductContractsMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_CoProductContractsMember_lbl" xml:lang="en-US"> Co-product contracts [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_Period1Member" xlink:label="peix_Period1Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Period1Member" xlink:to="peix_Period1Member_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_Period1Member_lbl" xml:lang="en-US"> 2019-2023 [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_Period2Member" xlink:label="peix_Period2Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Period2Member" xlink:to="peix_Period2Member_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_Period2Member_lbl" xml:lang="en-US"> 2024-2028 [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_Period4Member" xlink:label="peix_Period4Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Period4Member" xlink:to="peix_Period4Member_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_Period4Member_lbl" xml:lang="en-US"> 2034 and After [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_SuppliersMember" xlink:label="peix_SuppliersMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_SuppliersMember" xlink:to="peix_SuppliersMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_SuppliersMember_lbl" xml:lang="en-US"> Suppliers [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_CornMember" xlink:label="peix_CornMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CornMember" xlink:to="peix_CornMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_CornMember_lbl" xml:lang="en-US"> Corn contract [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_PropertyTaxAssessmentMember" xlink:label="peix_PropertyTaxAssessmentMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PropertyTaxAssessmentMember" xlink:to="peix_PropertyTaxAssessmentMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_PropertyTaxAssessmentMember_lbl" xml:lang="en-US"> Assessment Financing [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="us-gaap_StatementEquityComponentsAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementEquityComponentsAxis" xlink:to="us-gaap_StatementEquityComponentsAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xml:lang="en-US"> Equity Components [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockMember" xlink:label="us-gaap_PreferredStockMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockMember" xlink:to="us-gaap_PreferredStockMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockMember_lbl" xml:lang="en-US"> Preferred Stock [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockMember" xlink:to="us-gaap_CommonStockMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockMember_lbl" xml:lang="en-US"> Common Stock [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="us-gaap_AdditionalPaidInCapitalMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapitalMember" xlink:to="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xml:lang="en-US"> Additional Paid-In Capital [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="us-gaap_RetainedEarningsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsMember" xlink:to="us-gaap_RetainedEarningsMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RetainedEarningsMember_lbl" xml:lang="en-US"> Accumulated Deficit [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeMember_lbl" xml:lang="en-US"> Accum. Other Comprehensive Income (Loss) [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NoncontrollingInterestMember" xlink:label="us-gaap_NoncontrollingInterestMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncontrollingInterestMember" xlink:to="us-gaap_NoncontrollingInterestMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NoncontrollingInterestMember_lbl" xml:lang="en-US"> Non-Controlling Interests [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_LenderMember" xlink:label="peix_LenderMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_LenderMember" xlink:to="peix_LenderMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_LenderMember_lbl" xml:lang="en-US"> Lender [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SupplyCommitmentAxis" xlink:label="us-gaap_SupplyCommitmentAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SupplyCommitmentAxis" xlink:to="us-gaap_SupplyCommitmentAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SupplyCommitmentAxis_lbl" xml:lang="en-US"> Supply Commitment [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_EthanolSalesContractsMember" xlink:label="peix_EthanolSalesContractsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolSalesContractsMember" xlink:to="peix_EthanolSalesContractsMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_EthanolSalesContractsMember_lbl" xml:lang="en-US"> Ethanol Sales Contracts [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_CoproductsSalesContractsMember" xlink:label="peix_CoproductsSalesContractsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CoproductsSalesContractsMember" xlink:to="peix_CoproductsSalesContractsMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_CoproductsSalesContractsMember_lbl" xml:lang="en-US"> Co-products Sales Contracts [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis" xlink:label="us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis" xlink:to="us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis_lbl" xml:lang="en-US"> Purchase Commitment, Excluding Long-term Commitment [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_EthanolPurchaseContractsMember" xlink:label="peix_EthanolPurchaseContractsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolPurchaseContractsMember" xlink:to="peix_EthanolPurchaseContractsMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_EthanolPurchaseContractsMember_lbl" xml:lang="en-US"> Ethanol Purchase Contracts [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="us-gaap_RetirementPlanTypeAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetirementPlanTypeAxis" xlink:to="us-gaap_RetirementPlanTypeAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RetirementPlanTypeAxis_lbl" xml:lang="en-US"> Retirement Plan Type [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PostemploymentRetirementBenefitsMember" xlink:label="us-gaap_PostemploymentRetirementBenefitsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PostemploymentRetirementBenefitsMember" xlink:to="us-gaap_PostemploymentRetirementBenefitsMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PostemploymentRetirementBenefitsMember_lbl" xml:lang="en-US"> Retirement Plan [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPostretirementLifeInsuranceMember" xlink:label="us-gaap_DefinedBenefitPostretirementLifeInsuranceMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPostretirementLifeInsuranceMember" xlink:to="us-gaap_DefinedBenefitPostretirementLifeInsuranceMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DefinedBenefitPostretirementLifeInsuranceMember_lbl" xml:lang="en-US"> Postretirement Plan [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PostretirementBenefitCostsMember" xlink:label="us-gaap_PostretirementBenefitCostsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PostretirementBenefitCostsMember" xlink:to="us-gaap_PostretirementBenefitCostsMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PostretirementBenefitCostsMember_lbl" xml:lang="en-US"> Postretirement Plan [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CollateralAxis" xlink:label="us-gaap_CollateralAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CollateralAxis" xlink:to="us-gaap_CollateralAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CollateralAxis_lbl" xml:lang="en-US"> Collateral [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquipmentMember" xlink:label="us-gaap_EquipmentMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquipmentMember" xlink:to="us-gaap_EquipmentMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquipmentMember_lbl" xml:lang="en-US"> Equipment [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_LandRelatedMember" xlink:label="peix_LandRelatedMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_LandRelatedMember" xlink:to="peix_LandRelatedMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_LandRelatedMember_lbl" xml:lang="en-US"> Land Related [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeAxis" xlink:to="srt_RangeAxis_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="srt_RangeAxis_2_lbl" xml:lang="en-US"> Statistical Measurement [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:to="us-gaap_SellingGeneralAndAdministrativeExpensesMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpensesMember_lbl" xml:lang="en-US"> Selling, General and Administrative Expenses [Member] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DocumentAndEntityInformationAbstract" xlink:label="peix_DocumentAndEntityInformationAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DocumentAndEntityInformationAbstract" xlink:to="peix_DocumentAndEntityInformationAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DocumentAndEntityInformationAbstract_lbl" xml:lang="en-US"> Document and Entity Information [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityRegistrantName" xlink:label="dei_EntityRegistrantName"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityRegistrantName" xlink:to="dei_EntityRegistrantName_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityRegistrantName_lbl" xml:lang="en-US"> Entity Registrant Name </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="dei_EntityCentralIndexKey"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCentralIndexKey" xlink:to="dei_EntityCentralIndexKey_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityCentralIndexKey_lbl" xml:lang="en-US"> Entity Central Index Key </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AmendmentFlag" xlink:label="dei_AmendmentFlag"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AmendmentFlag" xlink:to="dei_AmendmentFlag_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_AmendmentFlag_lbl" xml:lang="en-US"> Amendment Flag </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentType" xlink:label="dei_DocumentType"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentType" xlink:to="dei_DocumentType_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentType_lbl" xml:lang="en-US"> Document Type </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="dei_DocumentPeriodEndDate"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentPeriodEndDate" xlink:to="dei_DocumentPeriodEndDate_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_DocumentPeriodEndDate_lbl" xml:lang="en-US"> Document Period End Date </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFilerCategory" xlink:label="dei_EntityFilerCategory"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFilerCategory" xlink:to="dei_EntityFilerCategory_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityFilerCategory_lbl" xml:lang="en-US"> Entity Filer Category </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityExTransitionPeriod" xlink:label="dei_EntityExTransitionPeriod"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityExTransitionPeriod" xlink:to="dei_EntityExTransitionPeriod_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityExTransitionPeriod_lbl" xml:lang="en-US"> Entity Ex Transition Period </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntitySmallBusiness" xlink:label="dei_EntitySmallBusiness"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntitySmallBusiness" xlink:to="dei_EntitySmallBusiness_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntitySmallBusiness_lbl" xml:lang="en-US"> Entity Small Business </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityEmergingGrowthCompany" xlink:label="dei_EntityEmergingGrowthCompany"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityEmergingGrowthCompany" xlink:to="dei_EntityEmergingGrowthCompany_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xml:lang="en-US"> Entity Emerging Growth Company </link:label>
<link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="dei_EntityIncorporationStateCountryCode"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xml:lang="en-US"> Entity Incorporation State Country Code </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable" xlink:label="us-gaap_StatementTable"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_StatementTable_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementTable_lbl" xml:lang="en-US"> Statement [Table] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems" xlink:label="us-gaap_StatementLineItems"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StatementLineItems_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementLineItems_lbl" xml:lang="en-US"> Statement [Line Items] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="us-gaap_AssetsAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_AssetsAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsAbstract_lbl" xml:lang="en-US"> ASSETS </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="us-gaap_AssetsCurrentAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrentAbstract" xlink:to="us-gaap_AssetsCurrentAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xml:lang="en-US"> Current Assets: </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xml:lang="en-US"> Cash and cash equivalents </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="us-gaap_AccountsReceivableNetCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsReceivableNetCurrent" xlink:to="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xml:lang="en-US"> Accounts receivable, net (net of allowance for doubtful accounts of $39 and $12, respectively) </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryNet" xlink:label="us-gaap_InventoryNet"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryNet" xlink:to="us-gaap_InventoryNet_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryNet_lbl" xml:lang="en-US"> Inventories </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:to="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xml:lang="en-US"> Prepaid inventory </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxesReceivable" xlink:label="us-gaap_IncomeTaxesReceivable"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxesReceivable" xlink:to="us-gaap_IncomeTaxesReceivable_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxesReceivable_lbl" xml:lang="en-US"> Income tax receivables </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeAssetsCurrent" xlink:label="us-gaap_DerivativeAssetsCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeAssetsCurrent" xlink:to="us-gaap_DerivativeAssetsCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeAssetsCurrent_lbl" xml:lang="en-US"> Derivative instruments </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="us-gaap_OtherAssetsCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssetsCurrent" xlink:to="us-gaap_OtherAssetsCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAssetsCurrent_lbl" xml:lang="en-US"> Other current assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="us-gaap_AssetsCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_AssetsCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_AssetsCurrent_lbl" xml:lang="en-US"> Total current assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="us-gaap_PropertyPlantAndEquipmentNet"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentNet" xlink:to="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xml:lang="en-US"> Property and equipment, net </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherAssetsAbstract" xlink:label="us-gaap_OtherAssetsAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssetsAbstract" xlink:to="us-gaap_OtherAssetsAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAssetsAbstract_lbl" xml:lang="en-US"> Other Assets: </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseRightOfUseAsset" xlink:to="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xml:lang="en-US"> Right of use operating lease assets, net </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:to="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_lbl" xml:lang="en-US"> Intangible assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="us-gaap_OtherAssetsNoncurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssetsNoncurrent" xlink:to="us-gaap_OtherAssetsNoncurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xml:lang="en-US"> Other assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherAssets" xlink:label="us-gaap_OtherAssets"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssets" xlink:to="us-gaap_OtherAssets_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OtherAssets_lbl" xml:lang="en-US"> Total other assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Assets" xlink:to="us-gaap_Assets_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Assets_lbl" xml:lang="en-US"> Total Assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xml:lang="en-US"> LIABILITIES AND STOCKHOLDERS' EQUITY </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="us-gaap_LiabilitiesCurrentAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrentAbstract" xlink:to="us-gaap_LiabilitiesCurrentAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesCurrentAbstract_lbl" xml:lang="en-US"> Current Liabilities: </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsPayableTradeCurrent" xlink:label="us-gaap_AccountsPayableTradeCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableTradeCurrent" xlink:to="us-gaap_AccountsPayableTradeCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccountsPayableTradeCurrent_lbl" xml:lang="en-US"> Accounts payable - trade </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="us-gaap_AccruedLiabilitiesCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedLiabilitiesCurrent" xlink:to="us-gaap_AccruedLiabilitiesCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccruedLiabilitiesCurrent_lbl" xml:lang="en-US"> Accrued liabilities </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeaseObligationsCurrent" xlink:label="us-gaap_CapitalLeaseObligationsCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeaseObligationsCurrent" xlink:to="us-gaap_CapitalLeaseObligationsCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CapitalLeaseObligationsCurrent_lbl" xml:lang="en-US"> Current portion - capital leases </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_CurrentPortionOperatingLeases" xlink:label="peix_CurrentPortionOperatingLeases"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CurrentPortionOperatingLeases" xlink:to="peix_CurrentPortionOperatingLeases_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_CurrentPortionOperatingLeases_lbl" xml:lang="en-US"> Current portion - operating leases </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="us-gaap_LongTermDebtCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtCurrent" xlink:to="us-gaap_LongTermDebtCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtCurrent_lbl" xml:lang="en-US"> Current portion - long-term debt </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgesLiabilities" xlink:label="us-gaap_DerivativeInstrumentsAndHedgesLiabilities"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeInstrumentsAndHedgesLiabilities" xlink:to="us-gaap_DerivativeInstrumentsAndHedgesLiabilities_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DerivativeInstrumentsAndHedgesLiabilities_lbl" xml:lang="en-US"> Derivative instruments </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherLiabilitiesCurrent" xlink:label="us-gaap_OtherLiabilitiesCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherLiabilitiesCurrent" xlink:to="us-gaap_OtherLiabilitiesCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherLiabilitiesCurrent_lbl" xml:lang="en-US"> Other current liabilities </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="us-gaap_LiabilitiesCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_LiabilitiesCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xml:lang="en-US"> Total current liabilities </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtNoncurrent" xlink:label="us-gaap_LongTermDebtNoncurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtNoncurrent" xlink:to="us-gaap_LongTermDebtNoncurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtNoncurrent_lbl" xml:lang="en-US"> Long-term debt, net of current portion </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseLiabilityCurrent" xlink:to="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xml:lang="en-US"> Operating leases, net of current portion </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_AssessmentFinancing" xlink:label="peix_AssessmentFinancing"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_AssessmentFinancing" xlink:to="peix_AssessmentFinancing_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_AssessmentFinancing_lbl" xml:lang="en-US"> Assessment financing </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeaseObligationsNoncurrent" xlink:label="us-gaap_CapitalLeaseObligationsNoncurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeaseObligationsNoncurrent" xlink:to="us-gaap_CapitalLeaseObligationsNoncurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CapitalLeaseObligationsNoncurrent_lbl" xml:lang="en-US"> Capital leases, net of current portion </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="us-gaap_OtherLiabilitiesNoncurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherLiabilitiesNoncurrent" xlink:to="us-gaap_OtherLiabilitiesNoncurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherLiabilitiesNoncurrent_lbl" xml:lang="en-US"> Other liabilities </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_Liabilities_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Liabilities_lbl" xml:lang="en-US"> Total Liabilities </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="us-gaap_CommitmentsAndContingencies"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingencies" xlink:to="us-gaap_CommitmentsAndContingencies_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xml:lang="en-US"> Commitments and Contingencies (Note 7) </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_lbl" xml:lang="en-US"> Stockholders' Equity: </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="us-gaap_PreferredStockValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockValue" xlink:to="us-gaap_PreferredStockValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockValue_lbl" xml:lang="en-US"> Preferred stock, value </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockValue" xlink:label="us-gaap_CommonStockValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockValue" xlink:to="us-gaap_CommonStockValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockValue_lbl" xml:lang="en-US"> Common stock, $0.001 par value; 300,000 shares authorized; 49,783 and 45,771 shares issued and outstanding as of September 30, 2019 and December 31, 2018, respectively </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_NonvotingCommonStockValue" xlink:label="peix_NonvotingCommonStockValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_NonvotingCommonStockValue" xlink:to="peix_NonvotingCommonStockValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_NonvotingCommonStockValue_lbl" xml:lang="en-US"> Non-voting common stock, $0.001 par value; 3,553 shares authorized; 1 share issued and outstanding as of September 30, 2019 and December 31, 2018, respectively </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="us-gaap_AdditionalPaidInCapital"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapital" xlink:to="us-gaap_AdditionalPaidInCapital_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xml:lang="en-US"> Additional paid-in capital </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:to="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_lbl" xml:lang="en-US"> Accumulated other comprehensive loss </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsAccumulatedDeficit" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xml:lang="en-US"> Accumulated deficit </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_StockholdersEquity_lbl" xml:lang="en-US"> Total Pacific Ethanol, Inc. Stockholders' Equity </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MinorityInterest" xlink:label="us-gaap_MinorityInterest"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinorityInterest" xlink:to="us-gaap_MinorityInterest_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MinorityInterest_lbl" xml:lang="en-US"> Noncontrolling interests </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US"> Total Stockholders' Equity </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xml:lang="en-US"> Total Liabilities and Stockholders' Equity </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:to="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_lbl" xml:lang="en-US"> Accounts receivable, net of allowance </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockParOrStatedValuePerShare" xlink:to="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xml:lang="en-US"> Preferred stock, par value (in dollars per share) </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="us-gaap_PreferredStockSharesAuthorized"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesAuthorized" xlink:to="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xml:lang="en-US"> Preferred stock, authorized </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="us-gaap_PreferredStockSharesIssued"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesIssued" xlink:to="us-gaap_PreferredStockSharesIssued_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xml:lang="en-US"> Preferred stock, issued </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="us-gaap_PreferredStockSharesOutstanding"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesOutstanding" xlink:to="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xml:lang="en-US"> Preferred stock, outstanding </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockLiquidationPreferenceValue" xlink:label="us-gaap_PreferredStockLiquidationPreferenceValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockLiquidationPreferenceValue" xlink:to="us-gaap_PreferredStockLiquidationPreferenceValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockLiquidationPreferenceValue_lbl" xml:lang="en-US"> Liquidation preference </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockParOrStatedValuePerShare" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xml:lang="en-US"> Common stock, par value (in dollars per shares) </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="us-gaap_CommonStockSharesAuthorized"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesAuthorized" xlink:to="us-gaap_CommonStockSharesAuthorized_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xml:lang="en-US"> Common stock, authorized </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="us-gaap_CommonStockSharesIssued"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesIssued" xlink:to="us-gaap_CommonStockSharesIssued_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xml:lang="en-US"> Common stock, issued </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="us-gaap_CommonStockSharesOutstanding"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesOutstanding" xlink:to="us-gaap_CommonStockSharesOutstanding_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xml:lang="en-US"> Common stock, outstanding </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="us-gaap_IncomeStatementAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_IncomeStatementAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xml:lang="en-US"> Income Statement [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:label="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:to="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_lbl" xml:lang="en-US"> Net sales </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="us-gaap_CostOfGoodsAndServicesSold"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfGoodsAndServicesSold" xlink:to="us-gaap_CostOfGoodsAndServicesSold_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostOfGoodsAndServicesSold_lbl" xml:lang="en-US"> Cost of goods sold </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GrossProfit" xlink:label="us-gaap_GrossProfit"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GrossProfit" xlink:to="us-gaap_GrossProfit_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_GrossProfit_lbl" xml:lang="en-US"> Gross profit (loss) </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SellingGeneralAndAdministrativeExpense" xlink:to="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_lbl" xml:lang="en-US"> Selling, general and administrative expenses </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="us-gaap_OperatingIncomeLoss"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingIncomeLoss" xlink:to="us-gaap_OperatingIncomeLoss_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xml:lang="en-US"> Loss from operations </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAdjustmentOfWarrants" xlink:label="us-gaap_FairValueAdjustmentOfWarrants"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAdjustmentOfWarrants" xlink:to="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xml:lang="en-US"> Fair value adjustments </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestExpense" xlink:label="us-gaap_InterestExpense"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpense" xlink:to="us-gaap_InterestExpense_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_InterestExpense_lbl" xml:lang="en-US"> Interest expense, net </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherOperatingIncomeExpenseNet" xlink:label="us-gaap_OtherOperatingIncomeExpenseNet"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherOperatingIncomeExpenseNet" xlink:to="us-gaap_OtherOperatingIncomeExpenseNet_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherOperatingIncomeExpenseNet_lbl" xml:lang="en-US"> Other income (expense), net </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_lbl" xml:lang="en-US"> Loss before benefit for income taxes </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="us-gaap_IncomeTaxExpenseBenefit"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxExpenseBenefit" xlink:to="us-gaap_IncomeTaxExpenseBenefit_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxExpenseBenefit_lbl" xml:lang="en-US"> Benefit for income taxes </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProfitLoss" xlink:label="us-gaap_ProfitLoss"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProfitLoss" xlink:to="us-gaap_ProfitLoss_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_ProfitLoss_lbl" xml:lang="en-US"> Consolidated net loss </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:to="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_lbl" xml:lang="en-US"> Net loss attributed to noncontrolling interests </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US"> Net loss attributed to Pacific Ethanol, Inc. </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DividendsPreferredStock" xlink:label="us-gaap_DividendsPreferredStock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPreferredStock" xlink:to="us-gaap_DividendsPreferredStock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DividendsPreferredStock_lbl" xml:lang="en-US"> Preferred stock dividends </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_IncomeAllocatedToParticipatingSecurities" xlink:label="peix_IncomeAllocatedToParticipatingSecurities"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IncomeAllocatedToParticipatingSecurities" xlink:to="peix_IncomeAllocatedToParticipatingSecurities_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_IncomeAllocatedToParticipatingSecurities_lbl" xml:lang="en-US"> Income allocated to participating securities </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:to="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_lbl" xml:lang="en-US"> Net loss available to common stockholders </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareBasicAndDiluted" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareBasicAndDiluted" xlink:to="us-gaap_EarningsPerShareBasicAndDiluted_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted_lbl" xml:lang="en-US"> Net loss per share, basic and diluted (in dollars per share) </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:to="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xml:lang="en-US"> Weighted-average shares outstanding, basic </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:to="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xml:lang="en-US"> Weighted-average shares outstanding, diluted </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:to="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_lbl" xml:lang="en-US"> Weighted-average shares outstanding, basic and diluted </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:label="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:to="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_lbl" xml:lang="en-US"> Statement of Comprehensive Income [Abstract] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProfitLoss" xlink:to="us-gaap_ProfitLoss_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProfitLoss_2_lbl" xml:lang="en-US"> Consolidated net income (loss) </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:label="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_lbl" xml:lang="en-US"> Other comprehensive income (expense) - net gain (loss) arising during the period on defined benefit pension plans </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest" xlink:to="us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US"> Total comprehensive loss </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest" xlink:to="us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_lbl" xml:lang="en-US"> Comprehensive (income) loss attributed to noncontrolling interests </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ComprehensiveIncomeNetOfTax" xlink:to="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_ComprehensiveIncomeNetOfTax_lbl" xml:lang="en-US"> Comprehensive loss attributed to Pacific Ethanol, Inc. </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="us-gaap_StatementOfCashFlowsAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xml:lang="en-US"> Statement of Cash Flows [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US"> Operating Activities: </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProfitLoss" xlink:to="us-gaap_ProfitLoss_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ProfitLoss_3_lbl" xml:lang="en-US"> Consolidated net loss </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US"> Adjustments to reconcile consolidated net income (loss) to cash provided by operating activities: </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="us-gaap_DepreciationAndAmortization"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepreciationAndAmortization" xlink:to="us-gaap_DepreciationAndAmortization_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xml:lang="en-US"> Depreciation and amortization of intangibles </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits" xlink:label="us-gaap_DeferredIncomeTaxesAndTaxCredits"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredIncomeTaxesAndTaxCredits" xlink:to="us-gaap_DeferredIncomeTaxesAndTaxCredits_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredIncomeTaxesAndTaxCredits_lbl" xml:lang="en-US"> Deferred income taxes </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AmortizationOfDebtDiscountPremium" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfDebtDiscountPremium" xlink:to="us-gaap_AmortizationOfDebtDiscountPremium_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium_lbl" xml:lang="en-US"> Amortization of debt discount </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:to="us-gaap_AmortizationOfFinancingCostsAndDiscounts_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts_lbl" xml:lang="en-US"> Amortization of deferred financing fees </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="us-gaap_ShareBasedCompensation"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensation" xlink:to="us-gaap_ShareBasedCompensation_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensation_lbl" xml:lang="en-US"> Non-cash compensation </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainLossOnDerivativeInstrumentsNetPretax" xlink:label="us-gaap_GainLossOnDerivativeInstrumentsNetPretax"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnDerivativeInstrumentsNetPretax" xlink:to="us-gaap_GainLossOnDerivativeInstrumentsNetPretax_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_GainLossOnDerivativeInstrumentsNetPretax_lbl" xml:lang="en-US"> (Gain) loss on derivative instruments </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts" xlink:label="us-gaap_ProvisionForDoubtfulAccounts"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProvisionForDoubtfulAccounts" xlink:to="us-gaap_ProvisionForDoubtfulAccounts_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProvisionForDoubtfulAccounts_lbl" xml:lang="en-US"> Bad debt expense </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Depreciation" xlink:label="us-gaap_Depreciation"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Depreciation" xlink:to="us-gaap_Depreciation_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Depreciation_lbl" xml:lang="en-US"> Depreciation </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAdjustmentOfWarrants" xlink:to="us-gaap_FairValueAdjustmentOfWarrants_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_2_lbl" xml:lang="en-US"> Fair value adjustments </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryWriteDown" xlink:label="us-gaap_InventoryWriteDown"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryWriteDown" xlink:to="us-gaap_InventoryWriteDown_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryWriteDown_lbl" xml:lang="en-US"> Inventory valuation </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1" xlink:label="us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1" xlink:to="us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1_lbl" xml:lang="en-US"> Change in fair value on commodity derivative instruments </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_InterestExpenseAddedToPlantTermDebt" xlink:label="peix_InterestExpenseAddedToPlantTermDebt"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_InterestExpenseAddedToPlantTermDebt" xlink:to="peix_InterestExpenseAddedToPlantTermDebt_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_InterestExpenseAddedToPlantTermDebt_lbl" xml:lang="en-US"> Interest expense added to plant term debt </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xml:lang="en-US"> Changes in operating assets and liabilities: </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:to="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xml:lang="en-US"> Accounts receivable </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="us-gaap_IncreaseDecreaseInInventories"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInInventories" xlink:to="us-gaap_IncreaseDecreaseInInventories_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInInventories_lbl" xml:lang="en-US"> Inventories </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:to="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xml:lang="en-US"> Prepaid expenses and other assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInOtherCurrentAssets" xlink:label="us-gaap_IncreaseDecreaseInOtherCurrentAssets"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOtherCurrentAssets" xlink:to="us-gaap_IncreaseDecreaseInOtherCurrentAssets_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInOtherCurrentAssets_lbl" xml:lang="en-US"> Prepaid inventory </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesRentExpenseNet" xlink:label="us-gaap_OperatingLeasesRentExpenseNet"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesRentExpenseNet" xlink:to="us-gaap_OperatingLeasesRentExpenseNet_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesRentExpenseNet_lbl" xml:lang="en-US"> Operating leases </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:to="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" xml:lang="en-US"> Accounts payable and accrued expenses </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xml:lang="en-US"> Net cash provided by (used in) operating activities </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xml:lang="en-US"> Investing Activities: </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:to="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xml:lang="en-US"> Additions to property and equipment </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:to="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_lbl" xml:lang="en-US"> Purchase of ICP, net of cash acquired </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsForProceedsFromOtherDeposits" xlink:label="us-gaap_PaymentsForProceedsFromOtherDeposits"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForProceedsFromOtherDeposits" xlink:to="us-gaap_PaymentsForProceedsFromOtherDeposits_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsForProceedsFromOtherDeposits_lbl" xml:lang="en-US"> Proceeds from cash collateralized letters of credit </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xml:lang="en-US"> Net cash used in investing activities </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xml:lang="en-US"> Financing Activities: </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfLinesOfCredit" xlink:label="us-gaap_ProceedsFromRepaymentsOfLinesOfCredit"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromRepaymentsOfLinesOfCredit" xlink:to="us-gaap_ProceedsFromRepaymentsOfLinesOfCredit_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromRepaymentsOfLinesOfCredit_lbl" xml:lang="en-US"> Net proceeds from Kinergy's line of credit </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:to="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xml:lang="en-US"> Proceeds from issuance of common stock </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ProceedsFromCogenContractAmendment" xlink:label="peix_ProceedsFromCogenContractAmendment"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ProceedsFromCogenContractAmendment" xlink:to="peix_ProceedsFromCogenContractAmendment_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_ProceedsFromCogenContractAmendment_lbl" xml:lang="en-US"> Proceeds from CoGen contract amendment </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ProceedsFromIcpCreditFacilities" xlink:label="peix_ProceedsFromIcpCreditFacilities"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ProceedsFromIcpCreditFacilities" xlink:to="peix_ProceedsFromIcpCreditFacilities_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_ProceedsFromIcpCreditFacilities_lbl" xml:lang="en-US"> Proceeds from assessment financing </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfDebt" xlink:label="us-gaap_ProceedsFromRepaymentsOfDebt"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromRepaymentsOfDebt" xlink:to="us-gaap_ProceedsFromRepaymentsOfDebt_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromRepaymentsOfDebt_lbl" xml:lang="en-US"> Principal payments on borrowings </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations" xlink:label="us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations" xlink:to="us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations_lbl" xml:lang="en-US"> Payments on capital leases </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock" xlink:label="us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock" xlink:to="us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_lbl" xml:lang="en-US"> Preferred stock dividends paid </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromWarrantExercises" xlink:label="us-gaap_ProceedsFromWarrantExercises"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromWarrantExercises" xlink:to="us-gaap_ProceedsFromWarrantExercises_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromWarrantExercises_lbl" xml:lang="en-US"> Proceeds from warrant and option exercises </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities" xlink:label="us-gaap_ProceedsFromPaymentsForOtherFinancingActivities"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromPaymentsForOtherFinancingActivities" xlink:to="us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_lbl" xml:lang="en-US"> Payments on assessment financing </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromLongTermLinesOfCredit" xlink:label="us-gaap_ProceedsFromLongTermLinesOfCredit"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromLongTermLinesOfCredit" xlink:to="us-gaap_ProceedsFromLongTermLinesOfCredit_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromLongTermLinesOfCredit_lbl" xml:lang="en-US"> Proceeds from plant term and revolving credit agreements </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromNotesPayable" xlink:label="us-gaap_ProceedsFromNotesPayable"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromNotesPayable" xlink:to="us-gaap_ProceedsFromNotesPayable_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromNotesPayable_lbl" xml:lang="en-US"> Proceeds from parent notes </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RepaymentsOfOtherDebt" xlink:label="us-gaap_RepaymentsOfOtherDebt"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfOtherDebt" xlink:to="us-gaap_RepaymentsOfOtherDebt_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_RepaymentsOfOtherDebt_lbl" xml:lang="en-US"> Payments on plant borrowings </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RepaymentsOfSeniorDebt" xlink:label="us-gaap_RepaymentsOfSeniorDebt"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfSeniorDebt" xlink:to="us-gaap_RepaymentsOfSeniorDebt_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_RepaymentsOfSeniorDebt_lbl" xml:lang="en-US"> Payments on senior notes </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromPaymentsToMinorityShareholders" xlink:label="us-gaap_ProceedsFromPaymentsToMinorityShareholders"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromPaymentsToMinorityShareholders" xlink:to="us-gaap_ProceedsFromPaymentsToMinorityShareholders_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromPaymentsToMinorityShareholders_lbl" xml:lang="en-US"> Sale of noncontrolling interests </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsOfDebtIssuanceCosts" xlink:to="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_lbl" xml:lang="en-US"> Debt issuance costs </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xml:lang="en-US"> Net cash provided by (used in) financing activities </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:to="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_lbl" xml:lang="en-US"> Net change in cash and cash equivalents </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_2_lbl" xml:lang="en-US"> Cash and cash equivalents at beginning of period </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_3_lbl" xml:lang="en-US"> Cash and cash equivalents at end of period </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SupplementalCashFlowInformationAbstract" xlink:to="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xml:lang="en-US"> Supplemental Cash Flow Information: </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestPaidNet" xlink:label="us-gaap_InterestPaidNet"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestPaidNet" xlink:to="us-gaap_InterestPaidNet_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestPaidNet_lbl" xml:lang="en-US"> Interest paid </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="us-gaap_IncomeTaxesPaidNet"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxesPaidNet" xlink:to="us-gaap_IncomeTaxesPaidNet_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xml:lang="en-US"> Income tax refunds received </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:label="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:to="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_lbl" xml:lang="en-US"> Noncash financing and investing activities: </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_InitialRightOfUseAssetsAndLiabilitiesRecordedUnderAsc842" xlink:label="peix_InitialRightOfUseAssetsAndLiabilitiesRecordedUnderAsc842"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_InitialRightOfUseAssetsAndLiabilitiesRecordedUnderAsc842" xlink:to="peix_InitialRightOfUseAssetsAndLiabilitiesRecordedUnderAsc842_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_InitialRightOfUseAssetsAndLiabilitiesRecordedUnderAsc842_lbl" xml:lang="en-US"> Initial right of use assets and liabilities recorded under ASC 842 </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_CapitalLeasesAddedToPlantAndEquipment" xlink:label="peix_CapitalLeasesAddedToPlantAndEquipment"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CapitalLeasesAddedToPlantAndEquipment" xlink:to="peix_CapitalLeasesAddedToPlantAndEquipment_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_CapitalLeasesAddedToPlantAndEquipment_lbl" xml:lang="en-US"> Capital leases added to plant and equipment </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ReclassOfWarrantLiabilityToEquityUponWarrantExercises" xlink:label="peix_ReclassOfWarrantLiabilityToEquityUponWarrantExercises"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ReclassOfWarrantLiabilityToEquityUponWarrantExercises" xlink:to="peix_ReclassOfWarrantLiabilityToEquityUponWarrantExercises_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_ReclassOfWarrantLiabilityToEquityUponWarrantExercises_lbl" xml:lang="en-US"> Reclass of warrant liability to equity upon exercises </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ContributionOfPropertyAndEquipmentForNoncontrollingInterest" xlink:label="peix_ContributionOfPropertyAndEquipmentForNoncontrollingInterest"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ContributionOfPropertyAndEquipmentForNoncontrollingInterest" xlink:to="peix_ContributionOfPropertyAndEquipmentForNoncontrollingInterest_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_ContributionOfPropertyAndEquipmentForNoncontrollingInterest_lbl" xml:lang="en-US"> Contribution of property and equipment for noncontrolling interest (see Note 2) </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DebtIssuedInIcpAcquisition" xlink:label="peix_DebtIssuedInIcpAcquisition"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DebtIssuedInIcpAcquisition" xlink:to="peix_DebtIssuedInIcpAcquisition_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DebtIssuedInIcpAcquisition_lbl" xml:lang="en-US"> Debt issued in ICP acquisition (see Note 2) </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:to="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_lbl" xml:lang="en-US"> Increase (Decrease) in Stockholders' Equity [Roll Forward] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2_lbl" xml:lang="en-US"> Balance at Beginning </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharesOutstanding" xlink:label="us-gaap_SharesOutstanding"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesOutstanding" xlink:to="us-gaap_SharesOutstanding_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_SharesOutstanding_lbl" xml:lang="en-US"> Balance at Beginning (in shares) </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition" xlink:to="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition_lbl" xml:lang="en-US"> Stock-based compensation expense – restricted stock issued to employees and directors, net of cancellations and tax </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_StockbasedCompensationExpenseRestrictedStockAndOptionsToEmployeesAndDirectorsNetOfCancellationsShares" xlink:label="peix_StockbasedCompensationExpenseRestrictedStockAndOptionsToEmployeesAndDirectorsNetOfCancellationsShares"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_StockbasedCompensationExpenseRestrictedStockAndOptionsToEmployeesAndDirectorsNetOfCancellationsShares" xlink:to="peix_StockbasedCompensationExpenseRestrictedStockAndOptionsToEmployeesAndDirectorsNetOfCancellationsShares_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_StockbasedCompensationExpenseRestrictedStockAndOptionsToEmployeesAndDirectorsNetOfCancellationsShares_lbl" xml:lang="en-US"> Stock-based compensation expense – restricted stock issued to employees and directors, net of cancellations and tax (in shares) </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueIssuedForServices" xlink:label="us-gaap_StockIssuedDuringPeriodValueIssuedForServices"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueIssuedForServices" xlink:to="us-gaap_StockIssuedDuringPeriodValueIssuedForServices_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueIssuedForServices_lbl" xml:lang="en-US"> Issuances of common stock </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" xlink:label="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices" xlink:to="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesIssuedForServices_lbl" xml:lang="en-US"> Issuances of common stock (in shares) </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:label="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_2_lbl" xml:lang="en-US"> Pension plan adjustment </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued" xlink:to="us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued_lbl" xml:lang="en-US"> Warrant and option exercises </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_WarrantExercisesSharesIssued" xlink:label="peix_WarrantExercisesSharesIssued"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WarrantExercisesSharesIssued" xlink:to="peix_WarrantExercisesSharesIssued_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_WarrantExercisesSharesIssued_lbl" xml:lang="en-US"> Warrant and option exercises (in shares) </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets" xlink:label="us-gaap_ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets" xlink:to="us-gaap_ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets_lbl" xml:lang="en-US"> Sale of Pacific Aurora interests to ACEC </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromContributedCapital" xlink:label="us-gaap_ProceedsFromContributedCapital"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromContributedCapital" xlink:to="us-gaap_ProceedsFromContributedCapital_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromContributedCapital_lbl" xml:lang="en-US"> ACEC contribution to form Pacific Aurora </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProfitLoss" xlink:to="us-gaap_ProfitLoss_4_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProfitLoss_4_lbl" xml:lang="en-US"> Net income (loss) </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_3_lbl" xml:lang="en-US"> Balance at End </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesOutstanding" xlink:to="us-gaap_SharesOutstanding_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_SharesOutstanding_2_lbl" xml:lang="en-US"> Balance at End (in shares) </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:to="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xml:lang="en-US"> Organization, Consolidation and Presentation of Financial Statements [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessDescriptionAndBasisOfPresentationTextBlock" xlink:label="us-gaap_BusinessDescriptionAndBasisOfPresentationTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessDescriptionAndBasisOfPresentationTextBlock" xlink:to="us-gaap_BusinessDescriptionAndBasisOfPresentationTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessDescriptionAndBasisOfPresentationTextBlock_lbl" xml:lang="en-US"> ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES. </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="us-gaap_BusinessCombinationsAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationsAbstract" xlink:to="us-gaap_BusinessCombinationsAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationsAbstract_lbl" xml:lang="en-US"> Business Combinations [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationDisclosureTextBlock" xlink:label="us-gaap_BusinessCombinationDisclosureTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationDisclosureTextBlock" xlink:to="us-gaap_BusinessCombinationDisclosureTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationDisclosureTextBlock_lbl" xml:lang="en-US"> PACIFIC ETHANOL PLANTS. </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryDisclosureAbstract" xlink:label="us-gaap_InventoryDisclosureAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryDisclosureAbstract" xlink:to="us-gaap_InventoryDisclosureAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryDisclosureAbstract_lbl" xml:lang="en-US"> Inventory Disclosure [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryDisclosureTextBlock" xlink:label="us-gaap_InventoryDisclosureTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryDisclosureTextBlock" xlink:to="us-gaap_InventoryDisclosureTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryDisclosureTextBlock_lbl" xml:lang="en-US"> INVENTORIES. </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_IntercompanyAgreementsAbstract" xlink:label="peix_IntercompanyAgreementsAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IntercompanyAgreementsAbstract" xlink:to="peix_IntercompanyAgreementsAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_IntercompanyAgreementsAbstract_lbl" xml:lang="en-US"> Intercompany Agreements [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_IntercompanyAgreementsTextBlock" xlink:label="peix_IntercompanyAgreementsTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IntercompanyAgreementsTextBlock" xlink:to="peix_IntercompanyAgreementsTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_IntercompanyAgreementsTextBlock_lbl" xml:lang="en-US"> INTERCOMPANY AGREEMENTS. </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="us-gaap_SegmentReportingAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentReportingAbstract" xlink:to="us-gaap_SegmentReportingAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentReportingAbstract_lbl" xml:lang="en-US"> Segment Reporting [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingDisclosureTextBlock" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentReportingDisclosureTextBlock" xlink:to="us-gaap_SegmentReportingDisclosureTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock_lbl" xml:lang="en-US"> SEGMENTS. </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAbstract" xlink:label="us-gaap_PropertyPlantAndEquipmentAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentAbstract" xlink:to="us-gaap_PropertyPlantAndEquipmentAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentAbstract_lbl" xml:lang="en-US"> Property, Plant and Equipment [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:label="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:to="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_lbl" xml:lang="en-US"> PROPERTY AND EQUIPMENT. </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:to="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_lbl" xml:lang="en-US"> Goodwill and Intangible Assets Disclosure [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock" xlink:to="us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_lbl" xml:lang="en-US"> INTANGIBLE ASSETS. </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:to="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_lbl" xml:lang="en-US"> Derivative Instruments and Hedging Activities Disclosure [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" xlink:to="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_lbl" xml:lang="en-US"> DERIVATIVES. </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeasesAbstract" xlink:label="us-gaap_LeasesAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeasesAbstract" xlink:to="us-gaap_LeasesAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LeasesAbstract_lbl" xml:lang="en-US"> Leases [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesOfLessorDisclosureTextBlock" xlink:label="us-gaap_OperatingLeasesOfLessorDisclosureTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesOfLessorDisclosureTextBlock" xlink:to="us-gaap_OperatingLeasesOfLessorDisclosureTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesOfLessorDisclosureTextBlock_lbl" xml:lang="en-US"> LEASES. </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtDisclosureAbstract" xlink:to="us-gaap_DebtDisclosureAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtDisclosureAbstract_lbl" xml:lang="en-US"> Debt Disclosure [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtDisclosureTextBlock" xlink:label="us-gaap_DebtDisclosureTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtDisclosureTextBlock" xlink:to="us-gaap_DebtDisclosureTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtDisclosureTextBlock_lbl" xml:lang="en-US"> DEBT. </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CompensationAndRetirementDisclosureAbstract" xlink:label="us-gaap_CompensationAndRetirementDisclosureAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CompensationAndRetirementDisclosureAbstract" xlink:to="us-gaap_CompensationAndRetirementDisclosureAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CompensationAndRetirementDisclosureAbstract_lbl" xml:lang="en-US"> Retirement Benefits [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CompensationAndEmployeeBenefitPlansTextBlock" xlink:label="us-gaap_CompensationAndEmployeeBenefitPlansTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CompensationAndEmployeeBenefitPlansTextBlock" xlink:to="us-gaap_CompensationAndEmployeeBenefitPlansTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CompensationAndEmployeeBenefitPlansTextBlock_lbl" xml:lang="en-US"> PENSION AND RETIREMENT BENEFIT PLANS. </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="us-gaap_IncomeTaxDisclosureAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_IncomeTaxDisclosureAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxDisclosureAbstract_lbl" xml:lang="en-US"> Income Tax Disclosure [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxDisclosureTextBlock" xlink:to="us-gaap_IncomeTaxDisclosureTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_lbl" xml:lang="en-US"> INCOME TAXES. </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityAbstract" xlink:label="us-gaap_EquityAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_EquityAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityAbstract_lbl" xml:lang="en-US"> Equity [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockTextBlock" xlink:label="us-gaap_PreferredStockTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockTextBlock" xlink:to="us-gaap_PreferredStockTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockTextBlock_lbl" xml:lang="en-US"> PREFERRED STOCK. </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityNoteAbstract" xlink:label="us-gaap_StockholdersEquityNoteAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityNoteAbstract" xlink:to="us-gaap_StockholdersEquityNoteAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityNoteAbstract_lbl" xml:lang="en-US"> Stockholders' Equity Note [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:to="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xml:lang="en-US"> COMMON STOCK AND WARRANTS. </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:to="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_lbl" xml:lang="en-US"> Share-based Payment Arrangement [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:to="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl" xml:lang="en-US"> STOCK-BASED COMPENSATION. </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:to="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xml:lang="en-US"> Commitments and Contingencies Disclosure [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:to="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xml:lang="en-US"> COMMITMENTS AND CONTINGENCIES. </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="us-gaap_FairValueDisclosuresAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueDisclosuresAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueDisclosuresAbstract_lbl" xml:lang="en-US"> Fair Value Disclosures [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueDisclosuresTextBlock" xlink:label="us-gaap_FairValueDisclosuresTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueDisclosuresTextBlock" xlink:to="us-gaap_FairValueDisclosuresTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl" xml:lang="en-US"> FAIR VALUE MEASUREMENTS. </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="us-gaap_EarningsPerShareAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareAbstract" xlink:to="us-gaap_EarningsPerShareAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareAbstract_lbl" xml:lang="en-US"> Earnings Per Share [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareTextBlock" xlink:label="us-gaap_EarningsPerShareTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareTextBlock" xlink:to="us-gaap_EarningsPerShareTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareTextBlock_lbl" xml:lang="en-US"> EARNINGS PER SHARE. </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract" xlink:label="srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract" xlink:to="srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract_lbl" xml:lang="en-US"> Condensed Financial Information Disclosure [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock" xlink:label="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock" xlink:to="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CondensedFinancialInformationOfParentCompanyOnlyDisclosureTextBlock_lbl" xml:lang="en-US"> PARENT COMPANY FINANCIALS. </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:label="us-gaap_QuarterlyFinancialInformationDisclosureAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:to="us-gaap_QuarterlyFinancialInformationDisclosureAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_QuarterlyFinancialInformationDisclosureAbstract_lbl" xml:lang="en-US"> Quarterly Financial Information Disclosure [Abstract] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_QuarterlyFinancialInformationTextBlock" xlink:label="us-gaap_QuarterlyFinancialInformationTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_QuarterlyFinancialInformationTextBlock" xlink:to="us-gaap_QuarterlyFinancialInformationTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_QuarterlyFinancialInformationTextBlock_lbl" xml:lang="en-US"> QUARTERLY FINANCIAL DATA (UNAUDITED). </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NatureOfOperations" xlink:label="us-gaap_NatureOfOperations"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NatureOfOperations" xlink:to="us-gaap_NatureOfOperations_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NatureOfOperations_lbl" xml:lang="en-US"> Organization and Business </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock" xlink:label="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock" xlink:to="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_lbl" xml:lang="en-US"> Basis of Presentation </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_LiquidityPolicyPolicyTextBlock" xlink:label="peix_LiquidityPolicyPolicyTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_LiquidityPolicyPolicyTextBlock" xlink:to="peix_LiquidityPolicyPolicyTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_LiquidityPolicyPolicyTextBlock_lbl" xml:lang="en-US"> Liquidity </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentReportingPolicyPolicyTextBlock" xlink:to="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentReportingPolicyPolicyTextBlock_lbl" xml:lang="en-US"> Segments </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:to="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" xml:lang="en-US"> Cash and Cash Equivalents </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReceivablesPolicyTextBlock" xlink:label="us-gaap_ReceivablesPolicyTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ReceivablesPolicyTextBlock" xlink:to="us-gaap_ReceivablesPolicyTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ReceivablesPolicyTextBlock_lbl" xml:lang="en-US"> Accounts Receivable and Allowance for Doubtful Accounts </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskCreditRisk" xlink:label="us-gaap_ConcentrationRiskCreditRisk"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConcentrationRiskCreditRisk" xlink:to="us-gaap_ConcentrationRiskCreditRisk_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConcentrationRiskCreditRisk_lbl" xml:lang="en-US"> Concentration Risks </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryPolicyTextBlock" xlink:label="us-gaap_InventoryPolicyTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryPolicyTextBlock" xlink:to="us-gaap_InventoryPolicyTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_InventoryPolicyTextBlock_lbl" xml:lang="en-US"> Inventories </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" xlink:to="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xml:lang="en-US"> Property and Equipment </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock" xlink:label="us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock" xlink:to="us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_lbl" xml:lang="en-US"> Intangible Assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativesReportingOfDerivativeActivity" xlink:label="us-gaap_DerivativesReportingOfDerivativeActivity"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativesReportingOfDerivativeActivity" xlink:to="us-gaap_DerivativesReportingOfDerivativeActivity_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativesReportingOfDerivativeActivity_lbl" xml:lang="en-US"> Derivative Instruments and Hedging Activities </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerTextBlock" xlink:label="us-gaap_RevenueFromContractWithCustomerTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueFromContractWithCustomerTextBlock" xlink:to="us-gaap_RevenueFromContractWithCustomerTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RevenueFromContractWithCustomerTextBlock_lbl" xml:lang="en-US"> Revenue Recognition </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ContractWithCustomerShippingAndHandlingCostPolicyTextBlock" xlink:label="peix_ContractWithCustomerShippingAndHandlingCostPolicyTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ContractWithCustomerShippingAndHandlingCostPolicyTextBlock" xlink:to="peix_ContractWithCustomerShippingAndHandlingCostPolicyTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_ContractWithCustomerShippingAndHandlingCostPolicyTextBlock_lbl" xml:lang="en-US"> Shipping and Handling Costs </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostsIncurredPolicy" xlink:label="us-gaap_CostsIncurredPolicy"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostsIncurredPolicy" xlink:to="us-gaap_CostsIncurredPolicy_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostsIncurredPolicy_lbl" xml:lang="en-US"> Selling Costs </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CompensationRelatedCostsPolicyTextBlock" xlink:label="us-gaap_CompensationRelatedCostsPolicyTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CompensationRelatedCostsPolicyTextBlock" xlink:to="us-gaap_CompensationRelatedCostsPolicyTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CompensationRelatedCostsPolicyTextBlock_lbl" xml:lang="en-US"> Stock-Based Compensation </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock" xlink:label="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock" xlink:to="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_lbl" xml:lang="en-US"> Impairment of Long-Lived Assets </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DeferredPolicyAcquisitionCostsDisclosurePolicyTextBlock" xlink:label="peix_DeferredPolicyAcquisitionCostsDisclosurePolicyTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DeferredPolicyAcquisitionCostsDisclosurePolicyTextBlock" xlink:to="peix_DeferredPolicyAcquisitionCostsDisclosurePolicyTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DeferredPolicyAcquisitionCostsDisclosurePolicyTextBlock_lbl" xml:lang="en-US"> Deferred Financing Costs </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxPolicyTextBlock" xlink:label="us-gaap_IncomeTaxPolicyTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxPolicyTextBlock" xlink:to="us-gaap_IncomeTaxPolicyTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxPolicyTextBlock_lbl" xml:lang="en-US"> Provision for Income Taxes </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerSharePolicyTextBlock" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerSharePolicyTextBlock" xlink:to="us-gaap_EarningsPerSharePolicyTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock_lbl" xml:lang="en-US"> Income (Loss) Per Share </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:label="us-gaap_FairValueOfFinancialInstrumentsPolicy"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:to="us-gaap_FairValueOfFinancialInstrumentsPolicy_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueOfFinancialInstrumentsPolicy_lbl" xml:lang="en-US"> Financial Instruments </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_EmploymentrelatedBenefitsPolicyTextBlock" xlink:label="peix_EmploymentrelatedBenefitsPolicyTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EmploymentrelatedBenefitsPolicyTextBlock" xlink:to="peix_EmploymentrelatedBenefitsPolicyTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_EmploymentrelatedBenefitsPolicyTextBlock_lbl" xml:lang="en-US"> Employment-related Benefits </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UseOfEstimates" xlink:label="us-gaap_UseOfEstimates"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UseOfEstimates" xlink:to="us-gaap_UseOfEstimates_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UseOfEstimates_lbl" xml:lang="en-US"> Estimates and Assumptions </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventsPolicyPolicyTextBlock" xlink:label="us-gaap_SubsequentEventsPolicyPolicyTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventsPolicyPolicyTextBlock" xlink:to="us-gaap_SubsequentEventsPolicyPolicyTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventsPolicyPolicyTextBlock_lbl" xml:lang="en-US"> Subsequent Events </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PriorPeriodReclassificationAdjustmentDescription" xlink:label="us-gaap_PriorPeriodReclassificationAdjustmentDescription"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PriorPeriodReclassificationAdjustmentDescription" xlink:to="us-gaap_PriorPeriodReclassificationAdjustmentDescription_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PriorPeriodReclassificationAdjustmentDescription_lbl" xml:lang="en-US"> Reclassifications </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:to="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xml:lang="en-US"> Recent Accounting Pronouncements </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock" xlink:label="us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock" xlink:to="us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfRevenueByMajorCustomersByReportingSegmentsTableTextBlock_lbl" xml:lang="en-US"> Schedule of concentrations of credit risk major customers </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_PurchasesFromExternalCustomersTableTextBlock" xlink:label="peix_PurchasesFromExternalCustomersTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PurchasesFromExternalCustomersTableTextBlock" xlink:to="peix_PurchasesFromExternalCustomersTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_PurchasesFromExternalCustomersTableTextBlock_lbl" xml:lang="en-US"> Schedule of purchases from external customers </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ScheduleOfInventoryTableTextBlock" xlink:label="peix_ScheduleOfInventoryTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ScheduleOfInventoryTableTextBlock" xlink:to="peix_ScheduleOfInventoryTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_ScheduleOfInventoryTableTextBlock_lbl" xml:lang="en-US"> Schedule of inventory </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_PropertyAndEquipmentDepreciationUsefulLives" xlink:label="peix_PropertyAndEquipmentDepreciationUsefulLives"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PropertyAndEquipmentDepreciationUsefulLives" xlink:to="peix_PropertyAndEquipmentDepreciationUsefulLives_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_PropertyAndEquipmentDepreciationUsefulLives_lbl" xml:lang="en-US"> Schedule of property and equipment useful lives </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfEarningsPerShareDilutedByCommonClassTextBlock" xlink:label="us-gaap_ScheduleOfEarningsPerShareDilutedByCommonClassTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfEarningsPerShareDilutedByCommonClassTextBlock" xlink:to="us-gaap_ScheduleOfEarningsPerShareDilutedByCommonClassTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfEarningsPerShareDilutedByCommonClassTextBlock_lbl" xml:lang="en-US"> Schedule of earnings per share </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock" xlink:label="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock" xlink:to="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTextBlock_lbl" xml:lang="en-US"> Schedule of purchase price allocation </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionProFormaInformationTextBlock" xlink:label="us-gaap_BusinessAcquisitionProFormaInformationTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionProFormaInformationTextBlock" xlink:to="us-gaap_BusinessAcquisitionProFormaInformationTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionProFormaInformationTextBlock_lbl" xml:lang="en-US"> Schedule of pro forma allocation </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:label="us-gaap_ScheduleOfInventoryCurrentTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:to="us-gaap_ScheduleOfInventoryCurrentTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfInventoryCurrentTableTextBlock_lbl" xml:lang="en-US"> Schedule of inventories </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:to="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl" xml:lang="en-US"> Schedule of financial date for operating segments </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTextBlock" xlink:label="us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTextBlock" xlink:to="us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ReconciliationOfAssetsFromSegmentToConsolidatedTextBlock_lbl" xml:lang="en-US"> Schedule of assets by operating segments </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:to="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentTextBlock_lbl" xml:lang="en-US"> Schedule of property and equipment </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfOtherDerivativesNotDesignatedAsHedgingInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock" xlink:label="us-gaap_ScheduleOfOtherDerivativesNotDesignatedAsHedgingInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfOtherDerivativesNotDesignatedAsHedgingInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock" xlink:to="us-gaap_ScheduleOfOtherDerivativesNotDesignatedAsHedgingInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfOtherDerivativesNotDesignatedAsHedgingInstrumentsStatementsOfFinancialPerformanceAndFinancialPositionLocationTableTextBlock_lbl" xml:lang="en-US"> Schedule of derivatives not designated as hedging instruments </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xlink:label="us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xlink:to="us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_lbl" xml:lang="en-US"> Schedule of recognized gains (losses) on derivatives </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLeaseIncomeTableTextBlock" xlink:label="us-gaap_OperatingLeaseLeaseIncomeTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseLeaseIncomeTableTextBlock" xlink:to="us-gaap_OperatingLeaseLeaseIncomeTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeaseLeaseIncomeTableTextBlock_lbl" xml:lang="en-US"> Schedule of operating lease liabilities </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:label="us-gaap_ScheduleOfDebtInstrumentsTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:to="us-gaap_ScheduleOfDebtInstrumentsTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfDebtInstrumentsTextBlock_lbl" xml:lang="en-US"> Schedule of long term debt </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock" xlink:label="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock" xlink:to="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_lbl" xml:lang="en-US"> Schedule of maturities of long-term debt </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock" xlink:label="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock" xlink:to="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock_lbl" xml:lang="en-US"> Schedule of defined contribution plan schedule </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock" xlink:label="us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock" xlink:to="us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_lbl" xml:lang="en-US"> Schedule of expected benefit payments </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfCostsOfRetirementPlansTableTextBlock" xlink:label="us-gaap_ScheduleOfCostsOfRetirementPlansTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfCostsOfRetirementPlansTableTextBlock" xlink:to="us-gaap_ScheduleOfCostsOfRetirementPlansTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfCostsOfRetirementPlansTableTextBlock_lbl" xml:lang="en-US"> Schedule of retirement plan costs </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock" xlink:label="us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock" xlink:to="us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_lbl" xml:lang="en-US"> Schedule of provision for income taxes </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:label="us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:to="us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_lbl" xml:lang="en-US"> Schedule of reconciliation of effective tax rate </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" xlink:label="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" xlink:to="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_lbl" xml:lang="en-US"> Schedule of components of deferred income taxes </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SummaryOfOperatingLossCarryforwardsTextBlock" xlink:label="us-gaap_SummaryOfOperatingLossCarryforwardsTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SummaryOfOperatingLossCarryforwardsTextBlock" xlink:to="us-gaap_SummaryOfOperatingLossCarryforwardsTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SummaryOfOperatingLossCarryforwardsTextBlock_lbl" xml:lang="en-US"> Schedule of net operating loss carryforwards </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ScheduleOfComponentsOfJurisdictionAndVariousStateJurisdictionsIncomeTaxExpenseBenefitTableTextBlock" xlink:label="peix_ScheduleOfComponentsOfJurisdictionAndVariousStateJurisdictionsIncomeTaxExpenseBenefitTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ScheduleOfComponentsOfJurisdictionAndVariousStateJurisdictionsIncomeTaxExpenseBenefitTableTextBlock" xlink:to="peix_ScheduleOfComponentsOfJurisdictionAndVariousStateJurisdictionsIncomeTaxExpenseBenefitTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_ScheduleOfComponentsOfJurisdictionAndVariousStateJurisdictionsIncomeTaxExpenseBenefitTableTextBlock_lbl" xml:lang="en-US"> Schedule of income tax in the United States jurisdiction and various state jurisdictions </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock" xlink:label="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock" xlink:to="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock_lbl" xml:lang="en-US"> Schedule of warrant activity </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:to="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xml:lang="en-US"> Schedule of option activity </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock" xlink:label="us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock" xlink:to="us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTextBlock_lbl" xml:lang="en-US"> Schedule of stock options by exercise price range </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfUnvestedRestrictedStockUnitsRollForwardTableTextBlock" xlink:label="us-gaap_ScheduleOfUnvestedRestrictedStockUnitsRollForwardTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfUnvestedRestrictedStockUnitsRollForwardTableTextBlock" xlink:to="us-gaap_ScheduleOfUnvestedRestrictedStockUnitsRollForwardTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfUnvestedRestrictedStockUnitsRollForwardTableTextBlock_lbl" xml:lang="en-US"> Schedule of unvested restricted stock activity </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock" xlink:to="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_lbl" xml:lang="en-US"> Schedule of stock-based compensation expense </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ScheduleOfFutureMinimumLeasePaymentsCapitalAndOperatingLeasesTableTextBlock" xlink:label="peix_ScheduleOfFutureMinimumLeasePaymentsCapitalAndOperatingLeasesTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ScheduleOfFutureMinimumLeasePaymentsCapitalAndOperatingLeasesTableTextBlock" xlink:to="peix_ScheduleOfFutureMinimumLeasePaymentsCapitalAndOperatingLeasesTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_ScheduleOfFutureMinimumLeasePaymentsCapitalAndOperatingLeasesTableTextBlock_lbl" xml:lang="en-US"> Schedule of future minimum lease payments - Capital and Operating Leases </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock" xlink:to="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl" xml:lang="en-US"> Schedule of fair value measurements </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock" xlink:to="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_lbl" xml:lang="en-US"> Schedule of computation of basic and diluted earnings per share </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_BalanceSheetsParentCompanyOnlyTableTextBlock" xlink:label="peix_BalanceSheetsParentCompanyOnlyTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_BalanceSheetsParentCompanyOnlyTableTextBlock" xlink:to="peix_BalanceSheetsParentCompanyOnlyTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_BalanceSheetsParentCompanyOnlyTableTextBlock_lbl" xml:lang="en-US"> Schedule of balance sheets - parent company </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_StatementsOfOperationsParentCompanyOnlyTableTextBlock" xlink:label="peix_StatementsOfOperationsParentCompanyOnlyTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_StatementsOfOperationsParentCompanyOnlyTableTextBlock" xlink:to="peix_StatementsOfOperationsParentCompanyOnlyTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_StatementsOfOperationsParentCompanyOnlyTableTextBlock_lbl" xml:lang="en-US"> Schedule of statements of operations parent company </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_StatementsOfCashFlowsParentCompanyOnlyTableTextBlock" xlink:label="peix_StatementsOfCashFlowsParentCompanyOnlyTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_StatementsOfCashFlowsParentCompanyOnlyTableTextBlock" xlink:to="peix_StatementsOfCashFlowsParentCompanyOnlyTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_StatementsOfCashFlowsParentCompanyOnlyTableTextBlock_lbl" xml:lang="en-US"> Schedule of statements of cash flows parent company </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" xlink:label="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" xlink:to="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_lbl" xml:lang="en-US"> Schedule of quarterly financial data </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:label="us-gaap_ConcentrationRiskPercentage1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConcentrationRiskPercentage1" xlink:to="us-gaap_ConcentrationRiskPercentage1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConcentrationRiskPercentage1_lbl" xml:lang="en-US"> Concentration risk percentage </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis" xlink:to="us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis_2_lbl" xml:lang="en-US"> Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Axis] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConcentrationRiskPercentage1" xlink:to="us-gaap_ConcentrationRiskPercentage1_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ConcentrationRiskPercentage1_2_lbl" xml:lang="en-US"> Concentration percentage </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves" xlink:label="us-gaap_InventoryFinishedGoodsNetOfReserves"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryFinishedGoodsNetOfReserves" xlink:to="us-gaap_InventoryFinishedGoodsNetOfReserves_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryFinishedGoodsNetOfReserves_lbl" xml:lang="en-US"> Finished goods </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryWorkInProcessNetOfReserves" xlink:label="us-gaap_InventoryWorkInProcessNetOfReserves"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryWorkInProcessNetOfReserves" xlink:to="us-gaap_InventoryWorkInProcessNetOfReserves_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryWorkInProcessNetOfReserves_lbl" xml:lang="en-US"> Work in progress </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryRawMaterialsNetOfReserves" xlink:label="us-gaap_InventoryRawMaterialsNetOfReserves"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryRawMaterialsNetOfReserves" xlink:to="us-gaap_InventoryRawMaterialsNetOfReserves_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryRawMaterialsNetOfReserves_lbl" xml:lang="en-US"> Raw materials </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_InventoryLowcarbonAndRinCreditsNetOfReserves" xlink:label="peix_InventoryLowcarbonAndRinCreditsNetOfReserves"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_InventoryLowcarbonAndRinCreditsNetOfReserves" xlink:to="peix_InventoryLowcarbonAndRinCreditsNetOfReserves_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_InventoryLowcarbonAndRinCreditsNetOfReserves_lbl" xml:lang="en-US"> Low-carbon and RIN credits </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherInventoryNetOfReserves" xlink:label="us-gaap_OtherInventoryNetOfReserves"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherInventoryNetOfReserves" xlink:to="us-gaap_OtherInventoryNetOfReserves_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherInventoryNetOfReserves_lbl" xml:lang="en-US"> Other </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryNet" xlink:to="us-gaap_InventoryNet_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_InventoryNet_2_lbl" xml:lang="en-US"> Total inventories </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives" xlink:label="us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives" xlink:to="us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentEstimatedUsefulLives_lbl" xml:lang="en-US"> Estimated useful lives </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLossAbstract" xlink:label="us-gaap_NetIncomeLossAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAbstract" xlink:to="us-gaap_NetIncomeLossAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossAbstract_lbl" xml:lang="en-US"> Loss Numerator </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLoss_2_lbl" xml:lang="en-US"> Net loss attributed to Pacific Ethanol, Inc. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPreferredStock" xlink:to="us-gaap_DividendsPreferredStock_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:label="us-gaap_DividendsPreferredStock_2_lbl" xml:lang="en-US"> Less: Preferred stock dividends </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IncomeAllocatedToParticipatingSecurities" xlink:to="peix_IncomeAllocatedToParticipatingSecurities_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="peix_IncomeAllocatedToParticipatingSecurities_2_lbl" xml:lang="en-US"> Less: Income allocated to participating securities </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareAbstract" xlink:to="us-gaap_EarningsPerShareAbstract_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_EarningsPerShareAbstract_2_lbl" xml:lang="en-US"> Basic and Diluted loss per share: </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareBasicAbstract" xlink:label="us-gaap_EarningsPerShareBasicAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareBasicAbstract" xlink:to="us-gaap_EarningsPerShareBasicAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareBasicAbstract_lbl" xml:lang="en-US"> Basic income per share: </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:to="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_2_lbl" xml:lang="en-US"> Income (loss) available to common stockholders, basic </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareDilutedAbstract" xlink:label="us-gaap_EarningsPerShareDilutedAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareDilutedAbstract" xlink:to="us-gaap_EarningsPerShareDilutedAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareDilutedAbstract_lbl" xml:lang="en-US"> Diluted income per share: </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted" xlink:to="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xml:lang="en-US"> Income (loss) available to common stockholders, diluted </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract" xlink:to="us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_lbl" xml:lang="en-US"> Shares Denominator </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:to="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_2_lbl" xml:lang="en-US"> Shares available to common stockholders - basic </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants" xlink:label="us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants" xlink:to="us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants_lbl" xml:lang="en-US"> Incremental shares - Options </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:to="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_2_lbl" xml:lang="en-US"> Shares available to common stockholders - diluted </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareBasicAndDilutedAbstract" xlink:label="us-gaap_EarningsPerShareBasicAndDilutedAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareBasicAndDilutedAbstract" xlink:to="us-gaap_EarningsPerShareBasicAndDilutedAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareBasicAndDilutedAbstract_lbl" xml:lang="en-US"> Per-Share Amount </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="us-gaap_EarningsPerShareBasic"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareBasic" xlink:to="us-gaap_EarningsPerShareBasic_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xml:lang="en-US"> Per-Share amount - basic </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="us-gaap_EarningsPerShareDiluted"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareDiluted" xlink:to="us-gaap_EarningsPerShareDiluted_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xml:lang="en-US"> Per-Shares amount - diluted </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="us-gaap_SubsequentEventTypeAxis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeAxis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xml:lang="en-US"> Subsequent Event Type [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:to="us-gaap_EquityMethodInvestmentOwnershipPercentage_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage_lbl" xml:lang="en-US"> Ownership interest </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent" xlink:label="us-gaap_MinorityInterestOwnershipPercentageByParent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinorityInterestOwnershipPercentageByParent" xlink:to="us-gaap_MinorityInterestOwnershipPercentageByParent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MinorityInterestOwnershipPercentageByParent_lbl" xml:lang="en-US"> Noncontrolling interest owned </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_NumberOfEthanolPlants" xlink:label="peix_NumberOfEthanolPlants"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_NumberOfEthanolPlants" xlink:to="peix_NumberOfEthanolPlants_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_NumberOfEthanolPlants_lbl" xml:lang="en-US"> Number of ethanol plants </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_EthanolProductionCapacityPerYear" xlink:label="peix_EthanolProductionCapacityPerYear"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolProductionCapacityPerYear" xlink:to="peix_EthanolProductionCapacityPerYear_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_EthanolProductionCapacityPerYear_lbl" xml:lang="en-US"> Ethanol production capacity per year </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_EthanolMarketCapacityPerYear" xlink:label="peix_EthanolMarketCapacityPerYear"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolMarketCapacityPerYear" xlink:to="peix_EthanolMarketCapacityPerYear_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_EthanolMarketCapacityPerYear_lbl" xml:lang="en-US"> Ethanol market capacity per year </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_OtherProductsProducedPerYear" xlink:label="peix_OtherProductsProducedPerYear"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_OtherProductsProducedPerYear" xlink:to="peix_OtherProductsProducedPerYear_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_OtherProductsProducedPerYear_lbl" xml:lang="en-US"> Other products produced per year </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PledgedAssetsSeparatelyReportedFinanceReceivablesPledgedAsCollateralAtFairValue" xlink:label="us-gaap_PledgedAssetsSeparatelyReportedFinanceReceivablesPledgedAsCollateralAtFairValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PledgedAssetsSeparatelyReportedFinanceReceivablesPledgedAsCollateralAtFairValue" xlink:to="us-gaap_PledgedAssetsSeparatelyReportedFinanceReceivablesPledgedAsCollateralAtFairValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PledgedAssetsSeparatelyReportedFinanceReceivablesPledgedAsCollateralAtFairValue_lbl" xml:lang="en-US"> Accounts receivable used as collateral </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent" xlink:to="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_2_lbl" xml:lang="en-US"> Allowance for doubtful accounts </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsReceivableNetCurrent" xlink:to="us-gaap_AccountsReceivableNetCurrent_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AccountsReceivableNetCurrent_2_lbl" xml:lang="en-US"> Accounts receivable </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_EmployeesCoveredByCollectiveBargainingAgreement" xlink:label="peix_EmployeesCoveredByCollectiveBargainingAgreement"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EmployeesCoveredByCollectiveBargainingAgreement" xlink:to="peix_EmployeesCoveredByCollectiveBargainingAgreement_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_EmployeesCoveredByCollectiveBargainingAgreement_lbl" xml:lang="en-US"> Employees covered by collective bargaining agreement </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FIFOInventoryAmount" xlink:label="us-gaap_FIFOInventoryAmount"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FIFOInventoryAmount" xlink:to="us-gaap_FIFOInventoryAmount_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FIFOInventoryAmount_lbl" xml:lang="en-US"> Net inventory valuation adjustment </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="us-gaap_AmortizationOfFinancingCosts"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfFinancingCosts" xlink:to="us-gaap_AmortizationOfFinancingCosts_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AmortizationOfFinancingCosts_lbl" xml:lang="en-US"> Amortization of deferred financing costs </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet" xlink:to="us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet_lbl" xml:lang="en-US"> Unamortized deferred financing costs </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:to="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xml:lang="en-US"> Potentially dilutive shares from convertible securities outstanding </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCollateralForBorrowedSecurities" xlink:label="us-gaap_CashCollateralForBorrowedSecurities"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCollateralForBorrowedSecurities" xlink:to="us-gaap_CashCollateralForBorrowedSecurities_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashCollateralForBorrowedSecurities_lbl" xml:lang="en-US"> Cash collateral balances </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SellingExpense" xlink:label="us-gaap_SellingExpense"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SellingExpense" xlink:to="us-gaap_SellingExpense_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SellingExpense_lbl" xml:lang="en-US"> External selling costs </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_IncreaseOfAssetsAndLeaseLiabilities" xlink:label="peix_IncreaseOfAssetsAndLeaseLiabilities"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IncreaseOfAssetsAndLeaseLiabilities" xlink:to="peix_IncreaseOfAssetsAndLeaseLiabilities_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_IncreaseOfAssetsAndLeaseLiabilities_lbl" xml:lang="en-US"> Increase of assets and lease liabilities </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue_4_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_4_lbl" xml:lang="en-US"> Cash </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCredit" xlink:label="us-gaap_LineOfCredit"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCredit" xlink:to="us-gaap_LineOfCredit_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCredit_lbl" xml:lang="en-US"> Line of credit </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts" xlink:label="us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts" xlink:to="us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AllowanceForLoanAndLeaseLossRecoveryOfBadDebts_lbl" xml:lang="en-US"> Bad debts recovery </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_EthanolProductionPlantAssest" xlink:label="peix_EthanolProductionPlantAssest"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolProductionPlantAssest" xlink:to="peix_EthanolProductionPlantAssest_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_EthanolProductionPlantAssest_lbl" xml:lang="en-US"> Ethanol production plant assest </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents_lbl" xml:lang="en-US"> Cash and equivalents </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_lbl" xml:lang="en-US"> Accounts receivable </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_lbl" xml:lang="en-US"> Inventories </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_lbl" xml:lang="en-US"> Other current assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssets_lbl" xml:lang="en-US"> Total current assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_lbl" xml:lang="en-US"> Property and equipment </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_lbl" xml:lang="en-US"> Other assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_lbl" xml:lang="en-US"> Total assets acquired </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_lbl" xml:lang="en-US"> Accounts payable, trade </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther_lbl" xml:lang="en-US"> Other current liabilities </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_lbl" xml:lang="en-US"> Long-term debt - term debt </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities_lbl" xml:lang="en-US"> Total current liabilities </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_lbl" xml:lang="en-US"> Other non-current liabilities </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_lbl" xml:lang="en-US"> Total liabilities assumed </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet_lbl" xml:lang="en-US"> Net assets acquired </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill" xlink:label="us-gaap_Goodwill"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Goodwill" xlink:to="us-gaap_Goodwill_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Goodwill_lbl" xml:lang="en-US"> Estimated goodwill </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_BusinessCombinationConsiderationTransferred" xlink:label="peix_BusinessCombinationConsiderationTransferred"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_BusinessCombinationConsiderationTransferred" xlink:to="peix_BusinessCombinationConsiderationTransferred_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_BusinessCombinationConsiderationTransferred_lbl" xml:lang="en-US"> Total purchase price </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaRevenue" xlink:label="us-gaap_BusinessAcquisitionsProFormaRevenue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionsProFormaRevenue" xlink:to="us-gaap_BusinessAcquisitionsProFormaRevenue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionsProFormaRevenue_lbl" xml:lang="en-US"> Net sales - pro forma </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_BusinessAcquisitionsProFormaCostOfGoodSold" xlink:label="peix_BusinessAcquisitionsProFormaCostOfGoodSold"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_BusinessAcquisitionsProFormaCostOfGoodSold" xlink:to="peix_BusinessAcquisitionsProFormaCostOfGoodSold_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_BusinessAcquisitionsProFormaCostOfGoodSold_lbl" xml:lang="en-US"> Cost of goods sold - pro forma </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_BusinessAcquisitionsProFormaSellingGeneralAdministrativeExpenses" xlink:label="peix_BusinessAcquisitionsProFormaSellingGeneralAdministrativeExpenses"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_BusinessAcquisitionsProFormaSellingGeneralAdministrativeExpenses" xlink:to="peix_BusinessAcquisitionsProFormaSellingGeneralAdministrativeExpenses_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_BusinessAcquisitionsProFormaSellingGeneralAdministrativeExpenses_lbl" xml:lang="en-US"> Selling, general and administrative expenses - pro forma </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss" xlink:label="us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss" xlink:to="us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss_lbl" xml:lang="en-US"> Consolidated net income (loss) - pro forma </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic" xlink:label="us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic" xlink:to="us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic_lbl" xml:lang="en-US"> Diluted net income (loss) per share - pro forma </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted" xlink:label="us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted" xlink:to="us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted_lbl" xml:lang="en-US"> Diluted weighted-average shares - pro forma </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:to="us-gaap_EquityMethodInvestmentOwnershipPercentage_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage_2_lbl" xml:lang="en-US"> Equity interest owned </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates" xlink:label="us-gaap_ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates" xlink:to="us-gaap_ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates_lbl" xml:lang="en-US"> Cash received in sale of subsidiary </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueAcquisitions" xlink:label="us-gaap_StockIssuedDuringPeriodValueAcquisitions"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueAcquisitions" xlink:to="us-gaap_StockIssuedDuringPeriodValueAcquisitions_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueAcquisitions_lbl" xml:lang="en-US"> Stock issued for acquisition, value </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:to="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_2_lbl" xml:lang="en-US"> Net Revenue </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_2_lbl" xml:lang="en-US"> Pre-tax income </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="us-gaap_GeneralAndAdministrativeExpense"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GeneralAndAdministrativeExpense" xlink:to="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xml:lang="en-US"> Selling, general and administrative expenses </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:label="us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired" xlink:to="us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_lbl" xml:lang="en-US"> Percentage of interests auquired </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesAcquisitions" xlink:label="us-gaap_StockIssuedDuringPeriodSharesAcquisitions"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesAcquisitions" xlink:to="us-gaap_StockIssuedDuringPeriodSharesAcquisitions_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesAcquisitions_lbl" xml:lang="en-US"> Stock issued for acquisition, shares issued </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivablesUncollectible" xlink:label="peix_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivablesUncollectible"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivablesUncollectible" xlink:to="peix_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivablesUncollectible_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivablesUncollectible_lbl" xml:lang="en-US"> Uncollectible accounts receivable from acquisition </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LitigationReserve" xlink:label="us-gaap_LitigationReserve"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LitigationReserve" xlink:to="us-gaap_LitigationReserve_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LitigationReserve_lbl" xml:lang="en-US"> Litigation contingency accrual </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LitigationSettlementExpense" xlink:label="us-gaap_LitigationSettlementExpense"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LitigationSettlementExpense" xlink:to="us-gaap_LitigationSettlementExpense_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LitigationSettlementExpense_lbl" xml:lang="en-US"> Litigation contingency paid </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SellingGeneralAndAdministrativeExpense" xlink:to="us-gaap_SellingGeneralAndAdministrativeExpense_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_SellingGeneralAndAdministrativeExpense_2_lbl" xml:lang="en-US"> Gain on settlement </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_EffectsOfInventoriesAndOpenContracts" xlink:label="peix_EffectsOfInventoriesAndOpenContracts"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EffectsOfInventoriesAndOpenContracts" xlink:to="peix_EffectsOfInventoriesAndOpenContracts_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_EffectsOfInventoriesAndOpenContracts_lbl" xml:lang="en-US"> Effects of inventories and open contracts </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DescriptionOfAgreementClosedTerm" xlink:label="peix_DescriptionOfAgreementClosedTerm"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DescriptionOfAgreementClosedTerm" xlink:to="peix_DescriptionOfAgreementClosedTerm_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DescriptionOfAgreementClosedTerm_lbl" xml:lang="en-US"> Description of agreement closed term </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest" xlink:label="us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest" xlink:to="us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest_lbl" xml:lang="en-US"> Ownership interest sold </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationIndemnificationAssetsAmountAsOfAcquisitionDate" xlink:label="us-gaap_BusinessCombinationIndemnificationAssetsAmountAsOfAcquisitionDate"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationIndemnificationAssetsAmountAsOfAcquisitionDate" xlink:to="us-gaap_BusinessCombinationIndemnificationAssetsAmountAsOfAcquisitionDate_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationIndemnificationAssetsAmountAsOfAcquisitionDate_lbl" xml:lang="en-US"> ACEC contribution in assets </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_AdditionalCashContributionInSale" xlink:label="peix_AdditionalCashContributionInSale"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_AdditionalCashContributionInSale" xlink:to="peix_AdditionalCashContributionInSale_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_AdditionalCashContributionInSale_lbl" xml:lang="en-US"> ACEC additional cash contribution </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_AdditionalPaidInCapitalForBookValueAndContributionAndSale" xlink:label="peix_AdditionalPaidInCapitalForBookValueAndContributionAndSale"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_AdditionalPaidInCapitalForBookValueAndContributionAndSale" xlink:to="peix_AdditionalPaidInCapitalForBookValueAndContributionAndSale_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_AdditionalPaidInCapitalForBookValueAndContributionAndSale_lbl" xml:lang="en-US"> Additional paid in capital for book value and contribution and sale </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_MinimumWorkingCapital" xlink:label="peix_MinimumWorkingCapital"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_MinimumWorkingCapital" xlink:to="peix_MinimumWorkingCapital_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_MinimumWorkingCapital_lbl" xml:lang="en-US"> Minimum working capital </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries" xlink:label="us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries" xlink:to="us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries_lbl" xml:lang="en-US"> Ownership interest purchase in cash </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ReductionInNoncontrollingInterest" xlink:label="peix_ReductionInNoncontrollingInterest"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ReductionInNoncontrollingInterest" xlink:to="peix_ReductionInNoncontrollingInterest_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_ReductionInNoncontrollingInterest_lbl" xml:lang="en-US"> Reduction in noncontrolling interest </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_IncreaseDecreaseInAdditionalPaidInCapitalDueToAcquisition" xlink:label="peix_IncreaseDecreaseInAdditionalPaidInCapitalDueToAcquisition"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IncreaseDecreaseInAdditionalPaidInCapitalDueToAcquisition" xlink:to="peix_IncreaseDecreaseInAdditionalPaidInCapitalDueToAcquisition_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_IncreaseDecreaseInAdditionalPaidInCapitalDueToAcquisition_lbl" xml:lang="en-US"> Increase (decrease) in additional paid in capital due to acquisition </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryNet" xlink:to="us-gaap_InventoryNet_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_InventoryNet_3_lbl" xml:lang="en-US"> Total </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FIFOInventoryAmount" xlink:to="us-gaap_FIFOInventoryAmount_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FIFOInventoryAmount_2_lbl" xml:lang="en-US"> Inventory, net of valuation adjustments </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TypeOfArrangementAxis" xlink:to="us-gaap_TypeOfArrangementAxis_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_TypeOfArrangementAxis_2_lbl" xml:lang="en-US"> Collaborative Arrangement and Arrangement Other than Collaborative [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_AgreementTerm" xlink:label="peix_AgreementTerm"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_AgreementTerm" xlink:to="peix_AgreementTerm_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_AgreementTerm_lbl" xml:lang="en-US"> Agreement term </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_AgreementRenewalTerm" xlink:label="peix_AgreementRenewalTerm"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_AgreementRenewalTerm" xlink:to="peix_AgreementRenewalTerm_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_AgreementRenewalTerm_lbl" xml:lang="en-US"> Agreement renewal term </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DescriptionOfAgreementTermination" xlink:label="peix_DescriptionOfAgreementTermination"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DescriptionOfAgreementTermination" xlink:to="peix_DescriptionOfAgreementTermination_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DescriptionOfAgreementTermination_lbl" xml:lang="en-US"> Description of agreement termination </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_NumberOfPlants" xlink:label="peix_NumberOfPlants"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_NumberOfPlants" xlink:to="peix_NumberOfPlants_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_NumberOfPlants_lbl" xml:lang="en-US"> Number of plants </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DescriptionOfAgreementTerms" xlink:label="peix_DescriptionOfAgreementTerms"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DescriptionOfAgreementTerms" xlink:to="peix_DescriptionOfAgreementTerms_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DescriptionOfAgreementTerms_lbl" xml:lang="en-US"> Description of agreement terms </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DeliveringAndProcessingServicesFeesPerDollar" xlink:label="peix_DeliveringAndProcessingServicesFeesPerDollar"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DeliveringAndProcessingServicesFeesPerDollar" xlink:to="peix_DeliveringAndProcessingServicesFeesPerDollar_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DeliveringAndProcessingServicesFeesPerDollar_lbl" xml:lang="en-US"> Services fees (per bushel) </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromRelatedParties" xlink:label="us-gaap_RevenueFromRelatedParties"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueFromRelatedParties" xlink:to="us-gaap_RevenueFromRelatedParties_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RevenueFromRelatedParties_lbl" xml:lang="en-US"> Revenues from related party </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_GrainProcurementExpenses" xlink:label="peix_GrainProcurementExpenses"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_GrainProcurementExpenses" xlink:to="peix_GrainProcurementExpenses_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_GrainProcurementExpenses_lbl" xml:lang="en-US"> Grain procurement expenses </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementBusinessSegmentsAxis" xlink:to="us-gaap_StatementBusinessSegmentsAxis_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StatementBusinessSegmentsAxis_2_lbl" xml:lang="en-US"> Segments [Axis] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax" xlink:to="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_3_lbl" xml:lang="en-US"> Net Sales </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_3_lbl" xml:lang="en-US"> Income (loss) before benefit for income taxes </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepreciationAndAmortization" xlink:to="us-gaap_DepreciationAndAmortization_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DepreciationAndAmortization_2_lbl" xml:lang="en-US"> Depreciation and amortization </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpense" xlink:to="us-gaap_InterestExpense_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestExpense_2_lbl" xml:lang="en-US"> Interest expense </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ProductionMember" xlink:label="peix_ProductionMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ProductionMember" xlink:to="peix_ProductionMember_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_ProductionMember_lbl" xml:lang="en-US"> Production [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Assets" xlink:to="us-gaap_Assets_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Assets_2_lbl" xml:lang="en-US"> Total Assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NumberOfOperatingSegments" xlink:label="us-gaap_NumberOfOperatingSegments"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NumberOfOperatingSegments" xlink:to="us-gaap_NumberOfOperatingSegments_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xml:lang="en-US"> Number of operating segments </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ManagementFees" xlink:label="peix_ManagementFees"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ManagementFees" xlink:to="peix_ManagementFees_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_ManagementFees_lbl" xml:lang="en-US"> Management fees </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="us-gaap_PropertyPlantAndEquipmentGross"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentGross" xlink:to="us-gaap_PropertyPlantAndEquipmentGross_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentGross_lbl" xml:lang="en-US"> Property, Plant and Equipment, Gross </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:to="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_lbl" xml:lang="en-US"> Accumulated Depreciation </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentNet" xlink:to="us-gaap_PropertyPlantAndEquipmentNet_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_2_lbl" xml:lang="en-US"> Property, Plant and Equipment, Net </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Depreciation" xlink:to="us-gaap_Depreciation_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_Depreciation_2_lbl" xml:lang="en-US"> Depreciation expense </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestCostsCapitalized" xlink:label="us-gaap_InterestCostsCapitalized"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestCostsCapitalized" xlink:to="us-gaap_InterestCostsCapitalized_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestCostsCapitalized_lbl" xml:lang="en-US"> Capitalized interest </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:to="us-gaap_IntangibleAssetsNetExcludingGoodwill_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IntangibleAssetsNetExcludingGoodwill_2_lbl" xml:lang="en-US"> Intangible assets amount </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue" xlink:label="us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue" xlink:to="us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue_lbl" xml:lang="en-US"> Derivative assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue" xlink:label="us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue" xlink:to="us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue_lbl" xml:lang="en-US"> Derivative liabilities </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:label="us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:to="us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_lbl" xml:lang="en-US"> Derivative Instruments, Gain (Loss) [Table] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:label="us-gaap_DerivativeInstrumentsGainLossLineItems"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:to="us-gaap_DerivativeInstrumentsGainLossLineItems_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeInstrumentsGainLossLineItems_lbl" xml:lang="en-US"> Derivative Instruments, Gain (Loss) [Line Items] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnDerivativeInstrumentsNetPretax" xlink:to="us-gaap_GainLossOnDerivativeInstrumentsNetPretax_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GainLossOnDerivativeInstrumentsNetPretax_2_lbl" xml:lang="en-US"> Realized Gains (Losses) </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts" xlink:label="us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts" xlink:to="us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts_lbl" xml:lang="en-US"> Unrealized Gains (Losses) </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1" xlink:to="us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1_2_lbl" xml:lang="en-US"> Recognized losses due to change in fair value </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_lbl" xml:lang="en-US"> 2019 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl" xml:lang="en-US"> 2020 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl" xml:lang="en-US"> 2021 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl" xml:lang="en-US"> 2022 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl" xml:lang="en-US"> 2023 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_lbl" xml:lang="en-US"> 2024-43 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" xml:lang="en-US"> Total </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_RightOfAssetsAndOperatingLeaseLiability" xlink:label="peix_RightOfAssetsAndOperatingLeaseLiability"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_RightOfAssetsAndOperatingLeaseLiability" xlink:to="peix_RightOfAssetsAndOperatingLeaseLiability_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_RightOfAssetsAndOperatingLeaseLiability_lbl" xml:lang="en-US"> Right of assets and operating lease liability </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:to="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_lbl" xml:lang="en-US"> Weighted average remaining lease term </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:to="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_lbl" xml:lang="en-US"> Operating lease, weighted average discount rate </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiability" xlink:label="us-gaap_OperatingLeaseLiability"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseLiability" xlink:to="us-gaap_OperatingLeaseLiability_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xml:lang="en-US"> Operating lease liability </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseTermOfContract" xlink:label="us-gaap_LesseeOperatingLeaseTermOfContract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LesseeOperatingLeaseTermOfContract" xlink:to="us-gaap_LesseeOperatingLeaseTermOfContract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LesseeOperatingLeaseTermOfContract_lbl" xml:lang="en-US"> Lease term </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseCost" xlink:label="us-gaap_OperatingLeaseCost"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseCost" xlink:to="us-gaap_OperatingLeaseCost_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeaseCost_lbl" xml:lang="en-US"> Operating lease costs </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtByComponentsAlternativeAbstract" xlink:label="us-gaap_LongTermDebtByComponentsAlternativeAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtByComponentsAlternativeAbstract" xlink:to="us-gaap_LongTermDebtByComponentsAlternativeAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtByComponentsAlternativeAbstract_lbl" xml:lang="en-US"> Long-term borrowings are summarized as follows </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShortTermBorrowings" xlink:label="us-gaap_ShortTermBorrowings"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermBorrowings" xlink:to="us-gaap_ShortTermBorrowings_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShortTermBorrowings_lbl" xml:lang="en-US"> Term debt </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NotesPayable" xlink:label="us-gaap_NotesPayable"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NotesPayable" xlink:to="us-gaap_NotesPayable_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NotesPayable_lbl" xml:lang="en-US"> Notes payable </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebt" xlink:label="us-gaap_LongTermDebt"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebt" xlink:to="us-gaap_LongTermDebt_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebt_lbl" xml:lang="en-US"> Total debt </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentUnamortizedDiscount" xlink:to="us-gaap_DebtInstrumentUnamortizedDiscount_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount_lbl" xml:lang="en-US"> Less unamortized debt discount </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnamortizedDebtIssuanceExpense" xlink:label="us-gaap_UnamortizedDebtIssuanceExpense"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnamortizedDebtIssuanceExpense" xlink:to="us-gaap_UnamortizedDebtIssuanceExpense_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_UnamortizedDebtIssuanceExpense_lbl" xml:lang="en-US"> Less unamortized debt financing costs </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtCurrent" xlink:to="us-gaap_LongTermDebtCurrent_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_LongTermDebtCurrent_2_lbl" xml:lang="en-US"> Less short-term portion </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtNoncurrent" xlink:to="us-gaap_LongTermDebtNoncurrent_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LongTermDebtNoncurrent_2_lbl" xml:lang="en-US"> Long-term debt </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_lbl" xml:lang="en-US"> 2019 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xml:lang="en-US"> 2020 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" xml:lang="en-US"> 2021 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" xml:lang="en-US"> 2022 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" xml:lang="en-US"> 2023 </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebt" xlink:to="us-gaap_LongTermDebt_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LongTermDebt_2_lbl" xml:lang="en-US"> Total debt </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xml:lang="en-US"> Maximum borrowing capacity </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityExpirationDate1" xlink:label="us-gaap_LineOfCreditFacilityExpirationDate1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityExpirationDate1" xlink:to="us-gaap_LineOfCreditFacilityExpirationDate1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityExpirationDate1_lbl" xml:lang="en-US"> Line of credit maturity date </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityInterestRateDescription" xlink:label="us-gaap_LineOfCreditFacilityInterestRateDescription"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityInterestRateDescription" xlink:to="us-gaap_LineOfCreditFacilityInterestRateDescription_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityInterestRateDescription_lbl" xml:lang="en-US"> Description of interest rate </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd" xlink:label="us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd" xlink:to="us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd_lbl" xml:lang="en-US"> Interest rate at end of period </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_LineOfCreditFacilityInterestMarginRate" xlink:label="peix_LineOfCreditFacilityInterestMarginRate"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_LineOfCreditFacilityInterestMarginRate" xlink:to="peix_LineOfCreditFacilityInterestMarginRate_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_LineOfCreditFacilityInterestMarginRate_lbl" xml:lang="en-US"> Interest margin rate </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:to="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_lbl" xml:lang="en-US"> Unused facility fees </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DescriptionOfPaymentMadeToCompany" xlink:label="peix_DescriptionOfPaymentMadeToCompany"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DescriptionOfPaymentMadeToCompany" xlink:to="peix_DescriptionOfPaymentMadeToCompany_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DescriptionOfPaymentMadeToCompany_lbl" xml:lang="en-US"> Description of payment made to company </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityCollateral" xlink:label="us-gaap_LineOfCreditFacilityCollateral"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityCollateral" xlink:to="us-gaap_LineOfCreditFacilityCollateral_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityCollateral_lbl" xml:lang="en-US"> Description of collateral </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:to="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_lbl" xml:lang="en-US"> Unused borrowing capacity </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="us-gaap_DebtInstrumentFaceAmount"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentFaceAmount" xlink:to="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xml:lang="en-US"> Debt face amount </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:label="us-gaap_DebtInstrumentMaturityDate"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentMaturityDate" xlink:to="us-gaap_DebtInstrumentMaturityDate_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xml:lang="en-US"> Debt maturity date </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentInterestRateTerms" xlink:label="us-gaap_DebtInstrumentInterestRateTerms"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateTerms" xlink:to="us-gaap_DebtInstrumentInterestRateTerms_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentInterestRateTerms_lbl" xml:lang="en-US"> Interest rate term </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentPeriodicPayment" xlink:label="us-gaap_DebtInstrumentPeriodicPayment"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentPeriodicPayment" xlink:to="us-gaap_DebtInstrumentPeriodicPayment_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentPeriodicPayment_lbl" xml:lang="en-US"> Principal payments </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentFrequencyOfPeriodicPayment" xlink:label="us-gaap_DebtInstrumentFrequencyOfPeriodicPayment"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentFrequencyOfPeriodicPayment" xlink:to="us-gaap_DebtInstrumentFrequencyOfPeriodicPayment_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentFrequencyOfPeriodicPayment_lbl" xml:lang="en-US"> Frequency of periodic payments </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentPaymentTerms" xlink:label="us-gaap_DebtInstrumentPaymentTerms"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentPaymentTerms" xlink:to="us-gaap_DebtInstrumentPaymentTerms_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentPaymentTerms_lbl" xml:lang="en-US"> Description payment terms </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentCovenantDescription" xlink:label="us-gaap_DebtInstrumentCovenantDescription"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentCovenantDescription" xlink:to="us-gaap_DebtInstrumentCovenantDescription_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentCovenantDescription_lbl" xml:lang="en-US"> Description of debt covenant </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_SubsequentDebtInstrumentCovenantDescription" xlink:label="peix_SubsequentDebtInstrumentCovenantDescription"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_SubsequentDebtInstrumentCovenantDescription" xlink:to="peix_SubsequentDebtInstrumentCovenantDescription_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_SubsequentDebtInstrumentCovenantDescription_lbl" xml:lang="en-US"> Description of debt covenant subsequent </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentDescription" xlink:label="us-gaap_DebtInstrumentDescription"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentDescription" xlink:to="us-gaap_DebtInstrumentDescription_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentDescription_lbl" xml:lang="en-US"> Description of borrowing terms </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DebtDefaultLongtermDebtInterestRate" xlink:label="peix_DebtDefaultLongtermDebtInterestRate"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DebtDefaultLongtermDebtInterestRate" xlink:to="peix_DebtDefaultLongtermDebtInterestRate_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DebtDefaultLongtermDebtInterestRate_lbl" xml:lang="en-US"> Debt default interest rate </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentCollateral" xlink:label="us-gaap_DebtInstrumentCollateral"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentCollateral" xlink:to="us-gaap_DebtInstrumentCollateral_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentCollateral_lbl" xml:lang="en-US"> Description of debt collateral </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentMaturityDateDescription" xlink:label="us-gaap_DebtInstrumentMaturityDateDescription"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentMaturityDateDescription" xlink:to="us-gaap_DebtInstrumentMaturityDateDescription_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentMaturityDateDescription_lbl" xml:lang="en-US"> Description of maturity date </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DebtInstrumentRetiremntAmount" xlink:label="peix_DebtInstrumentRetiremntAmount"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DebtInstrumentRetiremntAmount" xlink:to="peix_DebtInstrumentRetiremntAmount_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DebtInstrumentRetiremntAmount_lbl" xml:lang="en-US"> Debt retiremnt amount </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtInstrumentIncreaseDecreaseForPeriodNet" xlink:label="us-gaap_DebtInstrumentIncreaseDecreaseForPeriodNet"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentIncreaseDecreaseForPeriodNet" xlink:to="us-gaap_DebtInstrumentIncreaseDecreaseForPeriodNet_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentIncreaseDecreaseForPeriodNet_lbl" xml:lang="en-US"> Increased in debt amount </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentUnamortizedDiscount" xlink:to="us-gaap_DebtInstrumentUnamortizedDiscount_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount_2_lbl" xml:lang="en-US"> Debt discount </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaidInKindInterest" xlink:label="us-gaap_PaidInKindInterest"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaidInKindInterest" xlink:to="us-gaap_PaidInKindInterest_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaidInKindInterest_lbl" xml:lang="en-US"> Paid in kind interest </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebt" xlink:to="us-gaap_LongTermDebt_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LongTermDebt_3_lbl" xml:lang="en-US"> Principal balance </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RepaymentsOfDebt" xlink:label="us-gaap_RepaymentsOfDebt"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfDebt" xlink:to="us-gaap_RepaymentsOfDebt_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RepaymentsOfDebt_lbl" xml:lang="en-US"> Repayment of debt </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DeferredFinancingFees" xlink:label="peix_DeferredFinancingFees"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DeferredFinancingFees" xlink:to="peix_DeferredFinancingFees_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DeferredFinancingFees_lbl" xml:lang="en-US"> Deferred financing fees </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityBorrowingCapacityDescription" xlink:label="us-gaap_LineOfCreditFacilityBorrowingCapacityDescription"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityBorrowingCapacityDescription" xlink:to="us-gaap_LineOfCreditFacilityBorrowingCapacityDescription_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityBorrowingCapacityDescription_lbl" xml:lang="en-US"> Description of borrowing capacity </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DebtInstrumentFaceAmount1" xlink:label="peix_DebtInstrumentFaceAmount1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DebtInstrumentFaceAmount1" xlink:to="peix_DebtInstrumentFaceAmount1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DebtInstrumentFaceAmount1_lbl" xml:lang="en-US"> Additional borrowing </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DecsriptionOfMaintainWorkingCapital" xlink:label="peix_DecsriptionOfMaintainWorkingCapital"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DecsriptionOfMaintainWorkingCapital" xlink:to="peix_DecsriptionOfMaintainWorkingCapital_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DecsriptionOfMaintainWorkingCapital_lbl" xml:lang="en-US"> Description of maintain working capital </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefaultLongtermDebtDescriptionOfViolationOrEventOfDefault" xlink:label="us-gaap_DefaultLongtermDebtDescriptionOfViolationOrEventOfDefault"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefaultLongtermDebtDescriptionOfViolationOrEventOfDefault" xlink:to="us-gaap_DefaultLongtermDebtDescriptionOfViolationOrEventOfDefault_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefaultLongtermDebtDescriptionOfViolationOrEventOfDefault_lbl" xml:lang="en-US"> Description of event of default </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Assets" xlink:to="us-gaap_Assets_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_Assets_3_lbl" xml:lang="en-US"> Net assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LineOfCreditFacilityDateOfFirstRequiredPayment1" xlink:label="us-gaap_LineOfCreditFacilityDateOfFirstRequiredPayment1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityDateOfFirstRequiredPayment1" xlink:to="us-gaap_LineOfCreditFacilityDateOfFirstRequiredPayment1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityDateOfFirstRequiredPayment1_lbl" xml:lang="en-US"> Date of first required principal payment </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlanAbstract" xlink:label="us-gaap_DefinedBenefitPlanFundedStatusOfPlanAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanFundedStatusOfPlanAbstract" xlink:to="us-gaap_DefinedBenefitPlanFundedStatusOfPlanAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanFundedStatusOfPlanAbstract_lbl" xml:lang="en-US"> Changes in plan assets: </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets" xlink:label="us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets" xlink:to="us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets_lbl" xml:lang="en-US"> Fair value of plan assets, beginning </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanActuarialGainLoss" xlink:label="us-gaap_DefinedBenefitPlanActuarialGainLoss"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanActuarialGainLoss" xlink:to="us-gaap_DefinedBenefitPlanActuarialGainLoss_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanActuarialGainLoss_lbl" xml:lang="en-US"> Actual gains (losses) </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid" xlink:label="us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid" xlink:to="us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid_lbl" xml:lang="en-US"> Benefits paid </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanContributionsByEmployer" xlink:label="us-gaap_DefinedBenefitPlanContributionsByEmployer"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanContributionsByEmployer" xlink:to="us-gaap_DefinedBenefitPlanContributionsByEmployer_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanContributionsByEmployer_lbl" xml:lang="en-US"> Company contributions </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAssetsContributionsByPlanParticipant" xlink:label="us-gaap_DefinedBenefitPlanPlanAssetsContributionsByPlanParticipant"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanPlanAssetsContributionsByPlanParticipant" xlink:to="us-gaap_DefinedBenefitPlanPlanAssetsContributionsByPlanParticipant_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanPlanAssetsContributionsByPlanParticipant_lbl" xml:lang="en-US"> Participant contributions </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets" xlink:to="us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets_2_lbl" xml:lang="en-US"> Fair value of plan assets, ending </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligation" xlink:label="us-gaap_DefinedBenefitPlanBenefitObligation"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanBenefitObligation" xlink:to="us-gaap_DefinedBenefitPlanBenefitObligation_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanBenefitObligation_lbl" xml:lang="en-US"> Less: projected accumulated benefit obligation </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:label="us-gaap_DefinedBenefitPlanFundedStatusOfPlan"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:to="us-gaap_DefinedBenefitPlanFundedStatusOfPlan_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanFundedStatusOfPlan_lbl" xml:lang="en-US"> Funded status, (underfunded)/overfunded </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossAfterTaxAbstract" xlink:label="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossAfterTaxAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossAfterTaxAbstract" xlink:to="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossAfterTaxAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossAfterTaxAbstract_lbl" xml:lang="en-US"> Amounts recognized in the consolidated balance sheets: </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionOtherLiabilityAfterTax" xlink:label="peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionOtherLiabilityAfterTax"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionOtherLiabilityAfterTax" xlink:to="peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionOtherLiabilityAfterTax_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionOtherLiabilityAfterTax_lbl" xml:lang="en-US"> Other liabilities </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax" xlink:label="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax" xlink:to="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_lbl" xml:lang="en-US"> Accumulated other comprehensive loss (income) </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:to="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_lbl" xml:lang="en-US"> Components of net periodic benefit costs are as follows: </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="us-gaap_DefinedBenefitPlanServiceCost"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanServiceCost" xlink:to="us-gaap_DefinedBenefitPlanServiceCost_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanServiceCost_lbl" xml:lang="en-US"> Service cost </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="us-gaap_DefinedBenefitPlanInterestCost"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanInterestCost" xlink:to="us-gaap_DefinedBenefitPlanInterestCost_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanInterestCost_lbl" xml:lang="en-US"> Interest cost </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:label="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:to="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_lbl" xml:lang="en-US"> Expected return on plan assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:to="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_lbl" xml:lang="en-US"> Net periodic benefit cost </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:to="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_3_lbl" xml:lang="en-US"> Loss (gain) recognized in other comprehensive income (expense) </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract" xlink:label="us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract" xlink:to="us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_lbl" xml:lang="en-US"> Assumptions used in computation benefit obligations: </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate" xlink:to="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_lbl" xml:lang="en-US"> Discount rate </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets" xlink:to="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_lbl" xml:lang="en-US"> Expected long-term return on plan assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease" xlink:to="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostRateOfCompensationIncrease_lbl" xml:lang="en-US"> Rate of compensation increase </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths" xlink:to="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_lbl" xml:lang="en-US"> 2019 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo" xlink:to="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_lbl" xml:lang="en-US"> 2020 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree" xlink:to="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_lbl" xml:lang="en-US"> 2021 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour" xlink:to="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_lbl" xml:lang="en-US"> 2022 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive" xlink:to="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_lbl" xml:lang="en-US"> 2023 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter" xlink:to="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_lbl" xml:lang="en-US"> 2024-28 </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_TotalExpectedBenefitPayments" xlink:label="peix_TotalExpectedBenefitPayments"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_TotalExpectedBenefitPayments" xlink:to="peix_TotalExpectedBenefitPayments_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="peix_TotalExpectedBenefitPayments_lbl" xml:lang="en-US"> Total expected benefit payments </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanFundedStatusOfPlanAbstract" xlink:to="us-gaap_DefinedBenefitPlanFundedStatusOfPlanAbstract_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DefinedBenefitPlanFundedStatusOfPlanAbstract_2_lbl" xml:lang="en-US"> Amounts at the end of the year: </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation" xlink:label="us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation" xlink:to="us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_lbl" xml:lang="en-US"> Accumulated/projected benefit obligation </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets" xlink:label="us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets" xlink:to="us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets_lbl" xml:lang="en-US"> Fair value of plan assets </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionLiabilityAfterTax" xlink:label="peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionLiabilityAfterTax"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionLiabilityAfterTax" xlink:to="peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionLiabilityAfterTax_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionLiabilityAfterTax_lbl" xml:lang="en-US"> Accrued liabilties </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanFundedStatusOfPlanAbstract" xlink:to="us-gaap_DefinedBenefitPlanFundedStatusOfPlanAbstract_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DefinedBenefitPlanFundedStatusOfPlanAbstract_3_lbl" xml:lang="en-US"> Amounts recognized in the plan for the year: </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:to="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:label="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_2_lbl" xml:lang="en-US"> Amortization of prior service costs </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate" xlink:to="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_2_lbl" xml:lang="en-US"> Discount rate used in computation of benefit obligations </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_TotalExpectedBenefitPayments" xlink:to="peix_TotalExpectedBenefitPayments_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_TotalExpectedBenefitPayments_2_lbl" xml:lang="en-US"> Total expected benefit payments </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear" xlink:to="us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear_lbl" xml:lang="en-US"> Expected contributions by the company </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths" xlink:to="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_2_lbl" xml:lang="en-US"> Expected net periodic benefit cost for 2017 </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_PercentageOfPremedicarePostretirementMedicalBenefits" xlink:label="peix_PercentageOfPremedicarePostretirementMedicalBenefits"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PercentageOfPremedicarePostretirementMedicalBenefits" xlink:to="peix_PercentageOfPremedicarePostretirementMedicalBenefits_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_PercentageOfPremedicarePostretirementMedicalBenefits_lbl" xml:lang="en-US"> Percentage of pre-Medicare postretirement medical benefits </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_PerCapitaCostOfCoveredBenefits" xlink:label="peix_PerCapitaCostOfCoveredBenefits"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PerCapitaCostOfCoveredBenefits" xlink:to="peix_PerCapitaCostOfCoveredBenefits_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_PerCapitaCostOfCoveredBenefits_lbl" xml:lang="en-US"> Per capita cost of covered benefits </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DiscriptionOfAdjustingRateForAssumedHealthCare" xlink:label="peix_DiscriptionOfAdjustingRateForAssumedHealthCare"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DiscriptionOfAdjustingRateForAssumedHealthCare" xlink:to="peix_DiscriptionOfAdjustingRateForAssumedHealthCare_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DiscriptionOfAdjustingRateForAssumedHealthCare_lbl" xml:lang="en-US"> Percentage of adjusting rate assumed health care </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:to="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xml:lang="en-US"> Current provision (benefit) </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:to="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xml:lang="en-US"> Deferred provision (benefit) </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxExpenseBenefit" xlink:to="us-gaap_IncomeTaxExpenseBenefit_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_IncomeTaxExpenseBenefit_2_lbl" xml:lang="en-US"> Total </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract" xlink:to="us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperationsTaxRateReconciliationAbstract_lbl" xml:lang="en-US"> Effective income tax rate reconciliation </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" xml:lang="en-US"> Statutory rate </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_lbl" xml:lang="en-US"> State income taxes, net of federal benefit </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_lbl" xml:lang="en-US"> Change in valuation allowance </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance1" xlink:label="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance1" xlink:to="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance1_lbl" xml:lang="en-US"> Impact of Federal tax rate change on deferred taxes </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_EffectiveIncomeTaxRateReconciliationChangeInFederalTaxAssetsValuationAllowance" xlink:label="peix_EffectiveIncomeTaxRateReconciliationChangeInFederalTaxAssetsValuationAllowance"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EffectiveIncomeTaxRateReconciliationChangeInFederalTaxAssetsValuationAllowance" xlink:to="peix_EffectiveIncomeTaxRateReconciliationChangeInFederalTaxAssetsValuationAllowance_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_EffectiveIncomeTaxRateReconciliationChangeInFederalTaxAssetsValuationAllowance_lbl" xml:lang="en-US"> Impact of Federal tax rate change on valuation allowance </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsFairValueAdjustmentsAndWarrantInducements" xlink:label="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsFairValueAdjustmentsAndWarrantInducements"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsFairValueAdjustmentsAndWarrantInducements" xlink:to="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsFairValueAdjustmentsAndWarrantInducements_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsFairValueAdjustmentsAndWarrantInducements_lbl" xml:lang="en-US"> Fair value adjustments and warrant inducements </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsNoncontrollingInterests" xlink:label="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsNoncontrollingInterests"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsNoncontrollingInterests" xlink:to="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsNoncontrollingInterests_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsNoncontrollingInterests_lbl" xml:lang="en-US"> Noncontrolling interest </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_lbl" xml:lang="en-US"> Stock compensation </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther_lbl" xml:lang="en-US"> Non-deductible items </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments" xlink:to="us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_lbl" xml:lang="en-US"> Other </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:to="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_lbl" xml:lang="en-US"> Effective rate </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsGrossAbstract" xlink:label="us-gaap_DeferredTaxAssetsGrossAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsGrossAbstract" xlink:to="us-gaap_DeferredTaxAssetsGrossAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsGrossAbstract_lbl" xml:lang="en-US"> Deferred tax assets: </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwards" xlink:label="us-gaap_DeferredTaxAssetsTaxCreditCarryforwards"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsTaxCreditCarryforwards" xlink:to="us-gaap_DeferredTaxAssetsTaxCreditCarryforwards_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsTaxCreditCarryforwards_lbl" xml:lang="en-US"> Net operating loss carryforwards </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness" xlink:label="us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness" xlink:to="us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsGeneralBusiness_lbl" xml:lang="en-US"> R&D, energy and AMT credits </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DisallowedInterestDeferredtaxassets" xlink:label="peix_DisallowedInterestDeferredtaxassets"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DisallowedInterestDeferredtaxassets" xlink:to="peix_DisallowedInterestDeferredtaxassets_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DisallowedInterestDeferredtaxassets_lbl" xml:lang="en-US"> Disallowed interest </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DeferredTaxAssetsOtherRailcarContracts" xlink:label="peix_DeferredTaxAssetsOtherRailcarContracts"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DeferredTaxAssetsOtherRailcarContracts" xlink:to="peix_DeferredTaxAssetsOtherRailcarContracts_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DeferredTaxAssetsOtherRailcarContracts_lbl" xml:lang="en-US"> Railcar contracts </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits" xlink:to="us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits_lbl" xml:lang="en-US"> Stock-based compensation </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts" xlink:to="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts_lbl" xml:lang="en-US"> Allowance for doubtful accounts and other assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsDerivativeInstruments" xlink:label="us-gaap_DeferredTaxAssetsDerivativeInstruments"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsDerivativeInstruments" xlink:to="us-gaap_DeferredTaxAssetsDerivativeInstruments_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsDerivativeInstruments_lbl" xml:lang="en-US"> Derivatives </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DeferredTaxAssetsOtherPensionLiability" xlink:label="peix_DeferredTaxAssetsOtherPensionLiability"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DeferredTaxAssetsOtherPensionLiability" xlink:to="peix_DeferredTaxAssetsOtherPensionLiability_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DeferredTaxAssetsOtherPensionLiability_lbl" xml:lang="en-US"> Pension liability </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsOther" xlink:label="us-gaap_DeferredTaxAssetsOther"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsOther" xlink:to="us-gaap_DeferredTaxAssetsOther_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DeferredTaxAssetsOther_lbl" xml:lang="en-US"> Other </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsGross" xlink:label="us-gaap_DeferredTaxAssetsGross"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsGross" xlink:to="us-gaap_DeferredTaxAssetsGross_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_DeferredTaxAssetsGross_lbl" xml:lang="en-US"> Total deferred tax assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxLiabilitiesAbstract" xlink:label="us-gaap_DeferredTaxLiabilitiesAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxLiabilitiesAbstract" xlink:to="us-gaap_DeferredTaxLiabilitiesAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxLiabilitiesAbstract_lbl" xml:lang="en-US"> Deferred tax liabilities: </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment" xlink:label="us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment" xlink:to="us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_lbl" xml:lang="en-US"> Property and equipment </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets" xlink:label="us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets" xlink:to="us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_lbl" xml:lang="en-US"> Intangibles </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DeferredTaxLiabilitiesOtherDebtBasis" xlink:label="peix_DeferredTaxLiabilitiesOtherDebtBasis"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DeferredTaxLiabilitiesOtherDebtBasis" xlink:to="peix_DeferredTaxLiabilitiesOtherDebtBasis_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="peix_DeferredTaxLiabilitiesOtherDebtBasis_lbl" xml:lang="en-US"> Debt basis </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxLiabilitiesOther" xlink:label="us-gaap_DeferredTaxLiabilitiesOther"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxLiabilitiesOther" xlink:to="us-gaap_DeferredTaxLiabilitiesOther_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DeferredTaxLiabilitiesOther_lbl" xml:lang="en-US"> Other </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilities" xlink:label="us-gaap_DeferredIncomeTaxLiabilities"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredIncomeTaxLiabilities" xlink:to="us-gaap_DeferredIncomeTaxLiabilities_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:label="us-gaap_DeferredIncomeTaxLiabilities_lbl" xml:lang="en-US"> Total deferred tax liabilities </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsValuationAllowance" xlink:to="us-gaap_DeferredTaxAssetsValuationAllowance_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance_lbl" xml:lang="en-US"> Valuation allowance </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxLiabilities" xlink:label="us-gaap_DeferredTaxLiabilities"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxLiabilities" xlink:to="us-gaap_DeferredTaxLiabilities_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DeferredTaxLiabilities_lbl" xml:lang="en-US"> Net deferred tax liabilities, included in other liabilities </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_NonExpiringNonOperatingLosses" xlink:label="peix_NonExpiringNonOperatingLosses"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_NonExpiringNonOperatingLosses" xlink:to="peix_NonExpiringNonOperatingLosses_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_NonExpiringNonOperatingLosses_lbl" xml:lang="en-US"> Non-expiring NOLs </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLossCarryforwards" xlink:label="us-gaap_OperatingLossCarryforwards"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLossCarryforwards" xlink:to="us-gaap_OperatingLossCarryforwards_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLossCarryforwards_lbl" xml:lang="en-US"> Net operating loss carryforward </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_TaxYearsStillOpenToAudit" xlink:label="peix_TaxYearsStillOpenToAudit"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_TaxYearsStillOpenToAudit" xlink:to="peix_TaxYearsStillOpenToAudit_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_TaxYearsStillOpenToAudit_lbl" xml:lang="en-US"> Tax Years still open to audit </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsValuationAllowance" xlink:to="us-gaap_DeferredTaxAssetsValuationAllowance_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsValuationAllowance_2_lbl" xml:lang="en-US"> Valuation allowance </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" xlink:label="us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" xlink:to="us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_lbl" xml:lang="en-US"> Increase (decrease) in valuation allowance </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes" xlink:label="us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes" xlink:to="us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes_lbl" xml:lang="en-US"> Tax benefit related to adjustments to tax asset valuation allowance from prior year </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_RevisedEffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:label="peix_RevisedEffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_RevisedEffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:to="peix_RevisedEffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_RevisedEffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_lbl" xml:lang="en-US"> Revised federal income tax rate </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:label="us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:to="us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_lbl" xml:lang="en-US"> Valuation allowance absent of deferred tax liability </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_DecreasedGrossDeferredAssets" xlink:label="peix_DecreasedGrossDeferredAssets"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DecreasedGrossDeferredAssets" xlink:to="peix_DecreasedGrossDeferredAssets_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DecreasedGrossDeferredAssets_lbl" xml:lang="en-US"> Decreased gross deferred assets </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_AccruedTaxUncertainties" xlink:label="peix_AccruedTaxUncertainties"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_AccruedTaxUncertainties" xlink:to="peix_AccruedTaxUncertainties_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_AccruedTaxUncertainties_lbl" xml:lang="en-US"> Accrued tax uncertainties </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExaminationDescription" xlink:label="us-gaap_IncomeTaxExaminationDescription"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxExaminationDescription" xlink:to="us-gaap_IncomeTaxExaminationDescription_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxExaminationDescription_lbl" xml:lang="en-US"> Description of income tax </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxExpenseBenefit" xlink:to="us-gaap_IncomeTaxExpenseBenefit_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeTaxExpenseBenefit_3_lbl" xml:lang="en-US"> Provision (benefit) for income taxes </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_RemainingNetOperatingLossCarryforwards" xlink:label="peix_RemainingNetOperatingLossCarryforwards"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_RemainingNetOperatingLossCarryforwards" xlink:to="peix_RemainingNetOperatingLossCarryforwards_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_RemainingNetOperatingLossCarryforwards_lbl" xml:lang="en-US"> Remaining net operating loss carryforwards </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="us-gaap_DeferredTaxAssetsNet"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsNet" xlink:to="us-gaap_DeferredTaxAssetsNet_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsNet_lbl" xml:lang="en-US"> Deferred tax assets </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_PreferredStockUndesignatedSharesAuthorized" xlink:label="peix_PreferredStockUndesignatedSharesAuthorized"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PreferredStockUndesignatedSharesAuthorized" xlink:to="peix_PreferredStockUndesignatedSharesAuthorized_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_PreferredStockUndesignatedSharesAuthorized_lbl" xml:lang="en-US"> Preferred undesignated shares authorized </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesAuthorized" xlink:to="us-gaap_PreferredStockSharesAuthorized_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PreferredStockSharesAuthorized_2_lbl" xml:lang="en-US"> Preferred shares authorized </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesOutstanding" xlink:to="us-gaap_PreferredStockSharesOutstanding_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PreferredStockSharesOutstanding_2_lbl" xml:lang="en-US"> Preferred shares outstanding </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_PreferredStockConvertibleIntoCommonSharesCommonShares" xlink:label="peix_PreferredStockConvertibleIntoCommonSharesCommonShares"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PreferredStockConvertibleIntoCommonSharesCommonShares" xlink:to="peix_PreferredStockConvertibleIntoCommonSharesCommonShares_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_PreferredStockConvertibleIntoCommonSharesCommonShares_lbl" xml:lang="en-US"> Preferred stock convertible into common shares, common shares </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DividendsPreferredStockCash" xlink:label="us-gaap_DividendsPreferredStockCash"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPreferredStockCash" xlink:to="us-gaap_DividendsPreferredStockCash_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsPreferredStockCash_lbl" xml:lang="en-US"> Preferred stock dividends accrued and paid </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_CumulativeDividendsPayableInCash" xlink:label="peix_CumulativeDividendsPayableInCash"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CumulativeDividendsPayableInCash" xlink:to="peix_CumulativeDividendsPayableInCash_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_CumulativeDividendsPayableInCash_lbl" xml:lang="en-US"> Cumulative dividends payable in cash </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TemporaryEquityLiquidationPreferencePerShare" xlink:label="us-gaap_TemporaryEquityLiquidationPreferencePerShare"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TemporaryEquityLiquidationPreferencePerShare" xlink:to="us-gaap_TemporaryEquityLiquidationPreferencePerShare_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TemporaryEquityLiquidationPreferencePerShare_lbl" xml:lang="en-US"> Liquidation preference stock holder </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightAxis" xlink:to="us-gaap_ClassOfWarrantOrRightAxis_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ClassOfWarrantOrRightAxis_2_lbl" xml:lang="en-US"> Class of Warrant or Right [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_lbl" xml:lang="en-US"> Number of Shares </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfWarrantOrRightOutstanding" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightOutstanding" xlink:to="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xml:lang="en-US"> Begining Balance </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_WarrantsIssued" xlink:label="peix_WarrantsIssued"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WarrantsIssued" xlink:to="peix_WarrantsIssued_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_WarrantsIssued_lbl" xml:lang="en-US"> Warrants issued </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_WarrantsExercised" xlink:label="peix_WarrantsExercised"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WarrantsExercised" xlink:to="peix_WarrantsExercised_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="peix_WarrantsExercised_lbl" xml:lang="en-US"> Warrants exercised </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_WarrantsExpired" xlink:label="peix_WarrantsExpired"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WarrantsExpired" xlink:to="peix_WarrantsExpired_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="peix_WarrantsExpired_lbl" xml:lang="en-US"> Warrants expired </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightOutstanding" xlink:to="us-gaap_ClassOfWarrantOrRightOutstanding_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_2_lbl" xml:lang="en-US"> Ending Balance </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ExercuisePricePerShareAbstract" xlink:label="peix_ExercuisePricePerShareAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ExercuisePricePerShareAbstract" xlink:to="peix_ExercuisePricePerShareAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_ExercuisePricePerShareAbstract_lbl" xml:lang="en-US"> Price per Share </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:to="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xml:lang="en-US"> Begining Balance </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsIssued" xlink:label="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsIssued"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsIssued" xlink:to="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsIssued_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsIssued_lbl" xml:lang="en-US"> Warrants issued </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsExercised" xlink:label="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsExercised"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsExercised" xlink:to="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsExercised_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsExercised_lbl" xml:lang="en-US"> Warrants exercised </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsExpired" xlink:label="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsExpired"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsExpired" xlink:to="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsExpired_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsExpired_lbl" xml:lang="en-US"> Warrants expired </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1" xlink:to="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_2_lbl" xml:lang="en-US"> Ending Balance </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_lbl" xml:lang="en-US"> Weighted Average Exercise Price </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_WeightedAverageExercisePriceWarrantsOutstanding" xlink:label="peix_WeightedAverageExercisePriceWarrantsOutstanding"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WeightedAverageExercisePriceWarrantsOutstanding" xlink:to="peix_WeightedAverageExercisePriceWarrantsOutstanding_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="peix_WeightedAverageExercisePriceWarrantsOutstanding_lbl" xml:lang="en-US"> Begining Balance </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_WeightedAverageExercisePriceWarrantsIssued" xlink:label="peix_WeightedAverageExercisePriceWarrantsIssued"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WeightedAverageExercisePriceWarrantsIssued" xlink:to="peix_WeightedAverageExercisePriceWarrantsIssued_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="peix_WeightedAverageExercisePriceWarrantsIssued_lbl" xml:lang="en-US"> Warrants issued </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_WeightedAverageExercisePriceWarrantsExercised" xlink:label="peix_WeightedAverageExercisePriceWarrantsExercised"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WeightedAverageExercisePriceWarrantsExercised" xlink:to="peix_WeightedAverageExercisePriceWarrantsExercised_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="peix_WeightedAverageExercisePriceWarrantsExercised_lbl" xml:lang="en-US"> Warrants exercised </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_WeightedAverageExercisePriceWarrantsExpired" xlink:label="peix_WeightedAverageExercisePriceWarrantsExpired"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WeightedAverageExercisePriceWarrantsExpired" xlink:to="peix_WeightedAverageExercisePriceWarrantsExpired_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="peix_WeightedAverageExercisePriceWarrantsExpired_lbl" xml:lang="en-US"> Warrants expired </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WeightedAverageExercisePriceWarrantsOutstanding" xlink:to="peix_WeightedAverageExercisePriceWarrantsOutstanding_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="peix_WeightedAverageExercisePriceWarrantsOutstanding_2_lbl" xml:lang="en-US"> Ending Balance </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_WarrantInducements" xlink:label="peix_WarrantInducements"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WarrantInducements" xlink:to="peix_WarrantInducements_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_WarrantInducements_lbl" xml:lang="en-US"> Warrant inducements </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAdjustmentOfWarrants" xlink:to="us-gaap_FairValueAdjustmentOfWarrants_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_3_lbl" xml:lang="en-US"> Fair value adjustments for warrants </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_StockIssuedDuringPeriodSharesNewIssues3" xlink:label="peix_StockIssuedDuringPeriodSharesNewIssues3"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_StockIssuedDuringPeriodSharesNewIssues3" xlink:to="peix_StockIssuedDuringPeriodSharesNewIssues3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_StockIssuedDuringPeriodSharesNewIssues3_lbl" xml:lang="en-US"> Number of stock issued (in shares) </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_StockIssuedDuringPeriodValueNewIssues3" xlink:label="peix_StockIssuedDuringPeriodValueNewIssues3"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_StockIssuedDuringPeriodValueNewIssues3" xlink:to="peix_StockIssuedDuringPeriodValueNewIssues3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_StockIssuedDuringPeriodValueNewIssues3_lbl" xml:lang="en-US"> Number of stock issued, value </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsForBrokerageFees" xlink:label="us-gaap_PaymentsForBrokerageFees"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForBrokerageFees" xlink:to="us-gaap_PaymentsForBrokerageFees_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsForBrokerageFees_lbl" xml:lang="en-US"> Fees paid </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentMaturityDate" xlink:to="us-gaap_DebtInstrumentMaturityDate_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DebtInstrumentMaturityDate_2_lbl" xml:lang="en-US"> Maturity term </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AwardTypeAxis" xlink:to="us-gaap_AwardTypeAxis_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AwardTypeAxis_2_lbl" xml:lang="en-US"> Award Type [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xml:lang="en-US"> Begining Balance </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_lbl" xml:lang="en-US"> Exercised/cancelled </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_2_lbl" xml:lang="en-US"> Ending Balance </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions" xlink:to="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_lbl" xml:lang="en-US"> Options exercisable at end of year </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xml:lang="en-US"> Begining Balance </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US"> Expired </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_2_lbl" xml:lang="en-US"> Ending Balance </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1" xlink:to="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_lbl" xml:lang="en-US"> Options exercisable at end of year </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis" xlink:to="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_2_lbl" xml:lang="en-US"> Exercise Price Range [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions" xlink:to="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_lbl" xml:lang="en-US"> Number Outstanding </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2" xlink:to="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_lbl" xml:lang="en-US"> Weighted Average Remaining Contractual Life (yrs) </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1" xlink:to="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_lbl" xml:lang="en-US"> Weighted Average Exercise Price </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions" xlink:to="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_2_lbl" xml:lang="en-US"> Number Exercisable </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1" xlink:to="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_2_lbl" xml:lang="en-US"> Weighted Average Exercise Price </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_lbl" xml:lang="en-US"> Number of Shares </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xml:lang="en-US"> Begining Balance </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xml:lang="en-US"> Issued </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xml:lang="en-US"> Vested </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_lbl" xml:lang="en-US"> Canceled </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_2_lbl" xml:lang="en-US"> Ending Balance </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_lbl" xml:lang="en-US"> Weighted Average Grant Date Fair Value </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xml:lang="en-US"> Begining Balance </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xml:lang="en-US"> Issued </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl" xml:lang="en-US"> Vested </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_lbl" xml:lang="en-US"> Canceled </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_2_lbl" xml:lang="en-US"> Ending Balance </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensation" xlink:to="us-gaap_ShareBasedCompensation_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ShareBasedCompensation_2_lbl" xml:lang="en-US"> Total stock-based compensation expense </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_lbl" xml:lang="en-US"> Shares authorized </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl" xml:lang="en-US"> Intrinsic values of outstanding options </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1_lbl" xml:lang="en-US"> Fair value of stock vested </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions_lbl" xml:lang="en-US"> Total compensation cost related to unvested awards </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_lbl" xml:lang="en-US"> Compensation cost weighted average period </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueAbstract" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDueAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesFutureMinimumPaymentsDueAbstract" xlink:to="us-gaap_CapitalLeasesFutureMinimumPaymentsDueAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDueAbstract_lbl" xml:lang="en-US"> Capital Leases </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent" xlink:to="us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_lbl" xml:lang="en-US"> 2019 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears" xlink:to="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_lbl" xml:lang="en-US"> 2020 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears" xlink:to="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears_lbl" xml:lang="en-US"> 2021 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears" xlink:to="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears_lbl" xml:lang="en-US"> 2022 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears" xlink:to="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears_lbl" xml:lang="en-US"> 2023 </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter" xlink:to="us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter_lbl" xml:lang="en-US"> Thereafter </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalLeasesFutureMinimumPaymentsDue" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesFutureMinimumPaymentsDue" xlink:to="us-gaap_CapitalLeasesFutureMinimumPaymentsDue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDue_lbl" xml:lang="en-US"> Total minimum payments </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeaseObligationsCurrent" xlink:to="us-gaap_CapitalLeaseObligationsCurrent_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_CapitalLeaseObligationsCurrent_2_lbl" xml:lang="en-US"> Obligations due within one year </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeaseObligationsNoncurrent" xlink:to="us-gaap_CapitalLeaseObligationsNoncurrent_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CapitalLeaseObligationsNoncurrent_2_lbl" xml:lang="en-US"> Long-term obligations under capital leases </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueAbstract_lbl" xml:lang="en-US"> Operating Leases </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_2_lbl" xml:lang="en-US"> Thereafter </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_2_lbl" xml:lang="en-US"> Total minimum payments </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseAndRentalExpense" xlink:label="us-gaap_LeaseAndRentalExpense"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeaseAndRentalExpense" xlink:to="us-gaap_LeaseAndRentalExpense_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LeaseAndRentalExpense_lbl" xml:lang="en-US"> Rent expense </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_SalesCommitments" xlink:label="peix_SalesCommitments"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_SalesCommitments" xlink:to="peix_SalesCommitments_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_SalesCommitments_lbl" xml:lang="en-US"> Sales commitments </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_IndexedpriceContractsToSell" xlink:label="peix_IndexedpriceContractsToSell"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IndexedpriceContractsToSell" xlink:to="peix_IndexedpriceContractsToSell_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_IndexedpriceContractsToSell_lbl" xml:lang="en-US"> Indexed-price contracts to sell </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermPurchaseCommitmentAmount" xlink:label="us-gaap_LongTermPurchaseCommitmentAmount"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermPurchaseCommitmentAmount" xlink:to="us-gaap_LongTermPurchaseCommitmentAmount_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermPurchaseCommitmentAmount_lbl" xml:lang="en-US"> Purchase commitments </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_IndexedpricePurchaseContracts" xlink:label="peix_IndexedpricePurchaseContracts"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IndexedpricePurchaseContracts" xlink:to="peix_IndexedpricePurchaseContracts_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_IndexedpricePurchaseContracts_lbl" xml:lang="en-US"> Indexed-price purchase contracts </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_MaximumAmountOfFinanceToBeAmortizedUnderPropertyTaxAssessments" xlink:label="peix_MaximumAmountOfFinanceToBeAmortizedUnderPropertyTaxAssessments"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_MaximumAmountOfFinanceToBeAmortizedUnderPropertyTaxAssessments" xlink:to="peix_MaximumAmountOfFinanceToBeAmortizedUnderPropertyTaxAssessments_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_MaximumAmountOfFinanceToBeAmortizedUnderPropertyTaxAssessments_lbl" xml:lang="en-US"> Maximum amount of finance to be amortized under property tax assessments </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ProjectAmortizedPeriod" xlink:label="peix_ProjectAmortizedPeriod"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ProjectAmortizedPeriod" xlink:to="peix_ProjectAmortizedPeriod_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_ProjectAmortizedPeriod_lbl" xml:lang="en-US"> Project amortized period </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProductionCostsCumulative" xlink:label="us-gaap_ProductionCostsCumulative"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProductionCostsCumulative" xlink:to="us-gaap_ProductionCostsCumulative_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProductionCostsCumulative_lbl" xml:lang="en-US"> Capital expenditures </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LitigationReserve" xlink:to="us-gaap_LitigationReserve_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LitigationReserve_2_lbl" xml:lang="en-US"> Litigation reserve </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainLossRelatedToLitigationSettlement" xlink:label="us-gaap_GainLossRelatedToLitigationSettlement"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossRelatedToLitigationSettlement" xlink:to="us-gaap_GainLossRelatedToLitigationSettlement_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GainLossRelatedToLitigationSettlement_lbl" xml:lang="en-US"> Gain on litigation settlement </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_AdditionalPropertyTaxPayments" xlink:label="peix_AdditionalPropertyTaxPayments"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_AdditionalPropertyTaxPayments" xlink:to="peix_AdditionalPropertyTaxPayments_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_AdditionalPropertyTaxPayments_lbl" xml:lang="en-US"> Additional property tax payments </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_InterestRateOnOutstandingBalanceOfAssessment" xlink:label="peix_InterestRateOnOutstandingBalanceOfAssessment"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_InterestRateOnOutstandingBalanceOfAssessment" xlink:to="peix_InterestRateOnOutstandingBalanceOfAssessment_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_InterestRateOnOutstandingBalanceOfAssessment_lbl" xml:lang="en-US"> Interest rate on outstanding balance of assessment </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LitigationSettlementAmountAwardedToOtherParty" xlink:label="us-gaap_LitigationSettlementAmountAwardedToOtherParty"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LitigationSettlementAmountAwardedToOtherParty" xlink:to="us-gaap_LitigationSettlementAmountAwardedToOtherParty_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LitigationSettlementAmountAwardedToOtherParty_lbl" xml:lang="en-US"> Settlement cliam </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromLegalSettlements" xlink:label="us-gaap_ProceedsFromLegalSettlements"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromLegalSettlements" xlink:to="us-gaap_ProceedsFromLegalSettlements_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromLegalSettlements_lbl" xml:lang="en-US"> Proceeds from legal settlement </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LossContingencyDamagesSoughtValue" xlink:label="us-gaap_LossContingencyDamagesSoughtValue"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LossContingencyDamagesSoughtValue" xlink:to="us-gaap_LossContingencyDamagesSoughtValue_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LossContingencyDamagesSoughtValue_lbl" xml:lang="en-US"> Amount of expectation damages </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SignificantSupplyCommitmentDescription" xlink:label="us-gaap_SignificantSupplyCommitmentDescription"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SignificantSupplyCommitmentDescription" xlink:to="us-gaap_SignificantSupplyCommitmentDescription_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SignificantSupplyCommitmentDescription_lbl" xml:lang="en-US"> Open ethanol indexed-price sales contracts </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SignificantSupplyCommitmentRemainingMinimumAmountCommitted" xlink:label="us-gaap_SignificantSupplyCommitmentRemainingMinimumAmountCommitted"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SignificantSupplyCommitmentRemainingMinimumAmountCommitted" xlink:to="us-gaap_SignificantSupplyCommitmentRemainingMinimumAmountCommitted_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SignificantSupplyCommitmentRemainingMinimumAmountCommitted_lbl" xml:lang="en-US"> Open fixed-price sales contracts valued </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SignificantPurchaseCommitmentDescription" xlink:label="us-gaap_SignificantPurchaseCommitmentDescription"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SignificantPurchaseCommitmentDescription" xlink:to="us-gaap_SignificantPurchaseCommitmentDescription_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_SignificantPurchaseCommitmentDescription_lbl" xml:lang="en-US"> Indexed-price purchase contracts </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted" xlink:label="us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted" xlink:to="us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PurchaseCommitmentRemainingMinimumAmountCommitted_lbl" xml:lang="en-US"> Fixed-price purchase contracts value </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:to="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_3_lbl" xml:lang="en-US"> Expected return on plan assets </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:to="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_2_lbl" xml:lang="en-US"> Net periodic expense </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" xlink:to="us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_lbl" xml:lang="en-US"> Amortization of loss </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation" xlink:to="us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation_2_lbl" xml:lang="en-US"> Accumulated projected benefit obligation </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:to="us-gaap_DefinedBenefitPlanFundedStatusOfPlan_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DefinedBenefitPlanFundedStatusOfPlan_2_lbl" xml:lang="en-US"> Underfunded amount </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" xlink:to="us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_2_lbl" xml:lang="en-US"> Amortization expense </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xml:lang="en-US"> Fair Value, Recurring and Nonrecurring [Table] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xml:lang="en-US"> Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_2_lbl" xml:lang="en-US"> Fair Value Hierarchy and NAV [Axis] </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisAbstract" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisAbstract" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisAbstract_lbl" xml:lang="en-US"> Summary of fair value measurements by level </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsFairValueDisclosureAbstract" xlink:label="us-gaap_AssetsFairValueDisclosureAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsFairValueDisclosureAbstract" xlink:to="us-gaap_AssetsFairValueDisclosureAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsFairValueDisclosureAbstract_lbl" xml:lang="en-US"> Assets: </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="us-gaap_AssetsFairValueDisclosure"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsFairValueDisclosure" xlink:to="us-gaap_AssetsFairValueDisclosure_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xml:lang="en-US"> Assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosureAbstract" xlink:label="us-gaap_LiabilitiesFairValueDisclosureAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesFairValueDisclosureAbstract" xlink:to="us-gaap_LiabilitiesFairValueDisclosureAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesFairValueDisclosureAbstract_lbl" xml:lang="en-US"> Liabilities: </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosure" xlink:label="us-gaap_LiabilitiesFairValueDisclosure"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesFairValueDisclosure" xlink:to="us-gaap_LiabilitiesFairValueDisclosure_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl" xml:lang="en-US"> Liabilities </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage" xlink:label="us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage" xlink:to="us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage_lbl" xml:lang="en-US"> Benefit plan allocation percentage </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract" xlink:to="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasicAbstract_lbl" xml:lang="en-US"> Basic and diluted loss per share: </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:to="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_3_lbl" xml:lang="en-US"> Loss available to common stockholders </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted" xlink:to="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_WeightedAverageNumberOfShareOutstandingBasicAndDiluted_2_lbl" xml:lang="en-US"> Shares available to common stockholders - basic and diluted </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareBasicAndDiluted" xlink:to="us-gaap_EarningsPerShareBasicAndDiluted_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted_2_lbl" xml:lang="en-US"> Per-Share amount - basic and diluted </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsReceivableGross" xlink:label="us-gaap_AccountsReceivableGross"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsReceivableGross" xlink:to="us-gaap_AccountsReceivableGross_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccountsReceivableGross_lbl" xml:lang="en-US"> Receivables from subsidiaries </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_AssetsCurrent_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AssetsCurrent_2_lbl" xml:lang="en-US"> Total current assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsNoncurrentAbstract" xlink:label="us-gaap_AssetsNoncurrentAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsNoncurrentAbstract" xlink:to="us-gaap_AssetsNoncurrentAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AssetsNoncurrentAbstract_lbl" xml:lang="en-US"> Other Assets: </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures" xlink:label="us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures" xlink:to="us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_lbl" xml:lang="en-US"> Investments in subsidiaries </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_PacificEthanolWestPlantReceivable" xlink:label="peix_PacificEthanolWestPlantReceivable"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PacificEthanolWestPlantReceivable" xlink:to="peix_PacificEthanolWestPlantReceivable_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_PacificEthanolWestPlantReceivable_lbl" xml:lang="en-US"> Pacific Ethanol West plant receivable </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsNoncurrent" xlink:label="us-gaap_AssetsNoncurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsNoncurrent" xlink:to="us-gaap_AssetsNoncurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsNoncurrent_lbl" xml:lang="en-US"> Total other assets </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent" xlink:to="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_lbl" xml:lang="en-US"> Accounts payable and accrued liabilities </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_PayablesToSubsidiaries" xlink:label="peix_PayablesToSubsidiaries"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PayablesToSubsidiaries" xlink:to="peix_PayablesToSubsidiaries_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_PayablesToSubsidiaries_lbl" xml:lang="en-US"> Payable to subsidiaries </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned" xlink:label="us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned" xlink:to="us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned_lbl" xml:lang="en-US"> Accrued PE Op Co. purchase </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtCurrent" xlink:to="us-gaap_LongTermDebtCurrent_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LongTermDebtCurrent_3_lbl" xml:lang="en-US"> Current portion of long-term debt </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAccruedLiabilitiesCurrent" xlink:to="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OtherAccruedLiabilitiesCurrent_lbl" xml:lang="en-US"> Other current liabilities </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_LiabilitiesCurrent_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LiabilitiesCurrent_2_lbl" xml:lang="en-US"> Total current liabilities </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebt" xlink:to="us-gaap_LongTermDebt_4_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebt_4_lbl" xml:lang="en-US"> Long-term debt, net </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:to="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xml:lang="en-US"> Operating leases, net of current portion </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxLiabilitiesCurrent" xlink:label="us-gaap_DeferredTaxLiabilitiesCurrent"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxLiabilitiesCurrent" xlink:to="us-gaap_DeferredTaxLiabilitiesCurrent_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxLiabilitiesCurrent_lbl" xml:lang="en-US"> Deferred tax liabilities </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherLiabilitiesCurrent" xlink:to="us-gaap_OtherLiabilitiesCurrent_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OtherLiabilitiesCurrent_2_lbl" xml:lang="en-US"> Other liabilities </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_Liabilities_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Liabilities_2_lbl" xml:lang="en-US"> Total Liabilities </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="us-gaap_StockholdersEquityAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquityAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xml:lang="en-US"> Stockholders' Equity: </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockValue" xlink:to="us-gaap_PreferredStockValue_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PreferredStockValue_2_lbl" xml:lang="en-US"> Preferred stock </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockValue" xlink:to="us-gaap_CommonStockValue_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockValue_2_lbl" xml:lang="en-US"> Common and non-voting common stock </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquity_2_lbl" xml:lang="en-US"> Total Pacific Ethanol, Inc. stockholders' equity </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_2_lbl" xml:lang="en-US"> Total Liabilities and Stockholders' Equity </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueFromRelatedParties" xlink:to="us-gaap_RevenueFromRelatedParties_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_RevenueFromRelatedParties_2_lbl" xml:lang="en-US"> Management fees from subsidiaries </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingIncomeLoss" xlink:to="us-gaap_OperatingIncomeLoss_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingIncomeLoss_2_lbl" xml:lang="en-US"> Loss from operations </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InducedConversionOfConvertibleDebtExpense" xlink:label="us-gaap_InducedConversionOfConvertibleDebtExpense"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InducedConversionOfConvertibleDebtExpense" xlink:to="us-gaap_InducedConversionOfConvertibleDebtExpense_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_InducedConversionOfConvertibleDebtExpense_lbl" xml:lang="en-US"> Fair value adjustments </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestIncomeOperating" xlink:label="us-gaap_InterestIncomeOperating"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestIncomeOperating" xlink:to="us-gaap_InterestIncomeOperating_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestIncomeOperating_lbl" xml:lang="en-US"> Interest income </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpense" xlink:to="us-gaap_InterestExpense_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:label="us-gaap_InterestExpense_3_lbl" xml:lang="en-US"> Interest expense </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_4_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_4_lbl" xml:lang="en-US"> Income (loss) before provision (benefit) for income taxes </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxExpenseBenefit" xlink:to="us-gaap_IncomeTaxExpenseBenefit_4_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncomeTaxExpenseBenefit_4_lbl" xml:lang="en-US"> Provision (benefit) for income taxes </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:label="us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:to="us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US"> Income (loss) before equity in earnings of subsidiaries </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_EquityInEarningsLossesOfSubsidiaries" xlink:label="peix_EquityInEarningsLossesOfSubsidiaries"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EquityInEarningsLossesOfSubsidiaries" xlink:to="peix_EquityInEarningsLossesOfSubsidiaries_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_EquityInEarningsLossesOfSubsidiaries_lbl" xml:lang="en-US"> Equity in losses of subsidiaries </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NetIncomeLoss_3_lbl" xml:lang="en-US"> Net income (loss) </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_2_lbl" xml:lang="en-US"> Adjustments to reconcile net income (loss) to cash provided by operating activities: </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EquityInEarningsLossesOfSubsidiaries" xlink:to="peix_EquityInEarningsLossesOfSubsidiaries_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="peix_EquityInEarningsLossesOfSubsidiaries_2_lbl" xml:lang="en-US"> Equity in losses of subsidiaries </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Dividends" xlink:label="us-gaap_Dividends"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Dividends" xlink:to="us-gaap_Dividends_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Dividends_lbl" xml:lang="en-US"> Dividends from subsidiaries </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="us-gaap_DepreciationDepletionAndAmortization"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepreciationDepletionAndAmortization" xlink:to="us-gaap_DepreciationDepletionAndAmortization_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xml:lang="en-US"> Depreciation </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfDebtDiscountPremium" xlink:to="us-gaap_AmortizationOfDebtDiscountPremium_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium_2_lbl" xml:lang="en-US"> Amortization of debt discounts </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract" xlink:to="us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssetsAndLiabilitiesNetAbstract_lbl" xml:lang="en-US"> Changes in operating assets and liabilities: </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:to="us-gaap_IncreaseDecreaseInAccountsReceivable_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_2_lbl" xml:lang="en-US"> Accounts receivables </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOtherCurrentAssets" xlink:to="us-gaap_IncreaseDecreaseInOtherCurrentAssets_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:label="us-gaap_IncreaseDecreaseInOtherCurrentAssets_2_lbl" xml:lang="en-US"> Other assets </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_IncreaseDecreaseAccountsPayableWithSubsidiaries" xlink:label="peix_IncreaseDecreaseAccountsPayableWithSubsidiaries"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IncreaseDecreaseAccountsPayableWithSubsidiaries" xlink:to="peix_IncreaseDecreaseAccountsPayableWithSubsidiaries_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_IncreaseDecreaseAccountsPayableWithSubsidiaries_lbl" xml:lang="en-US"> Accounts payable with subsidiaries </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_2_lbl" xml:lang="en-US"> Net cash provided by operating activities </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromDividendsReceived" xlink:label="us-gaap_ProceedsFromDividendsReceived"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromDividendsReceived" xlink:to="us-gaap_ProceedsFromDividendsReceived_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromDividendsReceived_lbl" xml:lang="en-US"> Dividend from subsidiaries </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ContributionsToSubsidiaries" xlink:label="peix_ContributionsToSubsidiaries"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ContributionsToSubsidiaries" xlink:to="peix_ContributionsToSubsidiaries_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_ContributionsToSubsidiaries_lbl" xml:lang="en-US"> Contributions to subsidiaries </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_PaymentsForInvestmentsInSubsidiaries" xlink:label="peix_PaymentsForInvestmentsInSubsidiaries"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PaymentsForInvestmentsInSubsidiaries" xlink:to="peix_PaymentsForInvestmentsInSubsidiaries_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="peix_PaymentsForInvestmentsInSubsidiaries_lbl" xml:lang="en-US"> Investments in subsidiaries </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_PurchaseOfPeOpCo.Debt" xlink:label="peix_PurchaseOfPeOpCo.Debt"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PurchaseOfPeOpCo.Debt" xlink:to="peix_PurchaseOfPeOpCo.Debt_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="peix_PurchaseOfPeOpCo.Debt_lbl" xml:lang="en-US"> Purchase of PE OP Co. debt </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_2_lbl" xml:lang="en-US"> Net cash used in investing activities </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromNotesPayable" xlink:to="us-gaap_ProceedsFromNotesPayable_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ProceedsFromNotesPayable_2_lbl" xml:lang="en-US"> Proceeds from issuances of senior notes </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromContributionsFromAffiliates" xlink:label="us-gaap_ProceedsFromContributionsFromAffiliates"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromContributionsFromAffiliates" xlink:to="us-gaap_ProceedsFromContributionsFromAffiliates_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromContributionsFromAffiliates_lbl" xml:lang="en-US"> Proceeds from Pacific Ethanol West </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromWarrantExercises" xlink:to="us-gaap_ProceedsFromWarrantExercises_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ProceedsFromWarrantExercises_2_lbl" xml:lang="en-US"> Proceeds from warrant stock option exercises </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RepaymentsOfNotesPayable" xlink:label="us-gaap_RepaymentsOfNotesPayable"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfNotesPayable" xlink:to="us-gaap_RepaymentsOfNotesPayable_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_RepaymentsOfNotesPayable_lbl" xml:lang="en-US"> Payments on senior notes </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsOfDividends" xlink:label="us-gaap_PaymentsOfDividends"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsOfDividends" xlink:to="us-gaap_PaymentsOfDividends_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsOfDividends_lbl" xml:lang="en-US"> Preferred stock dividend payments </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_2_lbl" xml:lang="en-US"> Net cash used in financing activities </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:to="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_2_lbl" xml:lang="en-US"> Net increase (decrease) in cash and cash equivalents </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsNet" xlink:label="us-gaap_AssetsNet"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsNet" xlink:to="us-gaap_AssetsNet_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsNet_lbl" xml:lang="en-US"> Net asset </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_QuarterlyFinancialDataUnauditedAbstract" xlink:label="peix_QuarterlyFinancialDataUnauditedAbstract"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_QuarterlyFinancialDataUnauditedAbstract" xlink:to="peix_QuarterlyFinancialDataUnauditedAbstract_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_QuarterlyFinancialDataUnauditedAbstract_lbl" xml:lang="en-US"> Quarterly Financial Data Unaudited </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfGoodsAndServicesSold" xlink:to="us-gaap_CostOfGoodsAndServicesSold_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CostOfGoodsAndServicesSold_2_lbl" xml:lang="en-US"> Net sales </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GrossProfit" xlink:to="us-gaap_GrossProfit_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GrossProfit_2_lbl" xml:lang="en-US"> Gross profit (loss) </link:label>
<link:loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockDividendsAndOtherAdjustments" xlink:label="us-gaap_PreferredStockDividendsAndOtherAdjustments"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockDividendsAndOtherAdjustments" xlink:to="us-gaap_PreferredStockDividendsAndOtherAdjustments_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockDividendsAndOtherAdjustments_lbl" xml:lang="en-US"> Preferred stock dividends </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:to="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_4_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_4_lbl" xml:lang="en-US"> Net loss available to common stockholders </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareBasicAndDiluted" xlink:to="us-gaap_EarningsPerShareBasicAndDiluted_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EarningsPerShareBasicAndDiluted_3_lbl" xml:lang="en-US"> Basic and diluted loss per common share (in dollars per share) </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_AccruedTaxUncertainties" xlink:to="peix_AccruedTaxUncertainties_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_AccruedTaxUncertainties_doc" xml:lang="en-US"> It represents value of accrued tax uncertainties. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_AdditionalCashContributionInSale" xlink:to="peix_AdditionalCashContributionInSale_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_AdditionalCashContributionInSale_doc" xml:lang="en-US"> ACEC additional cash contribution </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_AdditionalPaidInCapitalForBookValueAndContributionAndSale" xlink:to="peix_AdditionalPaidInCapitalForBookValueAndContributionAndSale_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_AdditionalPaidInCapitalForBookValueAndContributionAndSale_doc" xml:lang="en-US"> Additional paid in capital for book value and contribution and sale </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_AdditionalPropertyTaxPayments" xlink:to="peix_AdditionalPropertyTaxPayments_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_AdditionalPropertyTaxPayments_doc" xml:lang="en-US"> It represents value of additional property tax payments. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_AffiliateManagementAgreementMember" xlink:to="peix_AffiliateManagementAgreementMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_AffiliateManagementAgreementMember_doc" xml:lang="en-US"> Information by category of arrangement, including but not limited to collaborative arrangements and non-collaborative arrangements. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_AgreementRenewalTerm" xlink:to="peix_AgreementRenewalTerm_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_AgreementRenewalTerm_doc" xml:lang="en-US"> It represents duration of agreement termination terms. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_AgreementTerm" xlink:to="peix_AgreementTerm_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_AgreementTerm_doc" xml:lang="en-US"> It represents duration of agreement terms. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_AmendmentCreditAgreementMember" xlink:to="peix_AmendmentCreditAgreementMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_AmendmentCreditAgreementMember_doc" xml:lang="en-US"> Information by category of arrangement, including but not limited to collaborative arrangements and non-collaborative arrangements. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ArizonaMember" xlink:to="peix_ArizonaMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ArizonaMember_doc" xml:lang="en-US"> Custom Element. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_AssessmentFinancing" xlink:to="peix_AssessmentFinancing_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_AssessmentFinancing_doc" xml:lang="en-US"> The amount of assessment financing. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_AuroraCoopElevatorMember" xlink:to="peix_AuroraCoopElevatorMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_AuroraCoopElevatorMember_doc" xml:lang="en-US"> The set of legal entities associated with a report. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_BalanceSheetsParentCompanyOnlyTableTextBlock" xlink:to="peix_BalanceSheetsParentCompanyOnlyTableTextBlock_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_BalanceSheetsParentCompanyOnlyTableTextBlock_doc" xml:lang="en-US"> Parent company financials - Balance Sheet [Table Text Block] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_BusinessAcquisitionsProFormaCostOfGoodSold" xlink:to="peix_BusinessAcquisitionsProFormaCostOfGoodSold_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_BusinessAcquisitionsProFormaCostOfGoodSold_doc" xml:lang="en-US"> The pro forma cost of goods sold for a period as if the business combination or combinations had been completed at the beginning of the period. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_BusinessAcquisitionsProFormaSellingGeneralAdministrativeExpenses" xlink:to="peix_BusinessAcquisitionsProFormaSellingGeneralAdministrativeExpenses_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_BusinessAcquisitionsProFormaSellingGeneralAdministrativeExpenses_doc" xml:lang="en-US"> The pro forma selling, general and administrative expenses for a period as if the business combination or combinations had been completed at the beginning of the period. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_BusinessCombinationConsiderationTransferred" xlink:to="peix_BusinessCombinationConsiderationTransferred_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_BusinessCombinationConsiderationTransferred_doc" xml:lang="en-US"> It refrest to business combination of consideration of transferred. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivablesUncollectible" xlink:to="peix_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivablesUncollectible_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivablesUncollectible_doc" xml:lang="en-US"> Uncollectible accounts receivable from acquisition </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CaliforniaMember" xlink:to="peix_CaliforniaMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_CaliforniaMember_doc" xml:lang="en-US"> Custom Element. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CapitalInvestmentActivitiesMember" xlink:to="peix_CapitalInvestmentActivitiesMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_CapitalInvestmentActivitiesMember_doc" xml:lang="en-US"> Information by type of long-lived, physical assets used to produce goods and services and not intended for resale. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CapitalLeasesAddedToPlantAndEquipment" xlink:to="peix_CapitalLeasesAddedToPlantAndEquipment_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_CapitalLeasesAddedToPlantAndEquipment_doc" xml:lang="en-US"> Capital leases added to plant and equipment </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CashCollateralBalanceMember" xlink:to="peix_CashCollateralBalanceMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_CashCollateralBalanceMember_doc" xml:lang="en-US"> Information by type of derivative contract. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsExercised" xlink:to="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsExercised_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsExercised_doc" xml:lang="en-US"> It represents number of shares of class of warrant or right exercise price of warrants or rights exercised. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsExpired" xlink:to="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsExpired_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsExpired_doc" xml:lang="en-US"> It represents number of shares of class of warrant or right exercise price of warrants or rights expired. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsIssued" xlink:to="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsIssued_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRightsIssued_doc" xml:lang="en-US"> It represents number of shares of class of warrant or right exercise price of warrants or rights issued. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CoProductContractsMember" xlink:to="peix_CoProductContractsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_CoProductContractsMember_doc" xml:lang="en-US"> Information related to co product contracts. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ColoradoMember" xlink:to="peix_ColoradoMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ColoradoMember_doc" xml:lang="en-US"> Custom Element. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ContractWithCustomerShippingAndHandlingCostPolicyTextBlock" xlink:to="peix_ContractWithCustomerShippingAndHandlingCostPolicyTextBlock_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ContractWithCustomerShippingAndHandlingCostPolicyTextBlock_doc" xml:lang="en-US"> The enitre policy for shipping and handling costs. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ContributionOfPropertyAndEquipmentForNoncontrollingInterest" xlink:to="peix_ContributionOfPropertyAndEquipmentForNoncontrollingInterest_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ContributionOfPropertyAndEquipmentForNoncontrollingInterest_doc" xml:lang="en-US"> Contribution of property and equipment for noncontrolling interest </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CoproductSalesMember" xlink:to="peix_CoproductSalesMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_CoproductSalesMember_doc" xml:lang="en-US"> The information about the corporate sales. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CornMember" xlink:to="peix_CornMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_CornMember_doc" xml:lang="en-US"> Information related to corn. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CornProcurementAgreementMember" xlink:to="peix_CornProcurementAgreementMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_CornProcurementAgreementMember_doc" xml:lang="en-US"> Information by category of arrangement, including but not limited to collaborative arrangements and non-collaborative arrangements. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CorporateActivitiesMember" xlink:to="peix_CorporateActivitiesMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_CorporateActivitiesMember_doc" xml:lang="en-US"> Corporate Assets [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CorporateAssetsMember" xlink:to="peix_CorporateAssetsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_CorporateAssetsMember_doc" xml:lang="en-US"> Information by business segments. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CreditAgreementMember" xlink:to="peix_CreditAgreementMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_CreditAgreementMember_doc" xml:lang="en-US"> Information by category of arrangement, including but not limited to collaborative arrangements and non-collaborative arrangements. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CumulativeDividendsPayableInCash" xlink:to="peix_CumulativeDividendsPayableInCash_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_CumulativeDividendsPayableInCash_doc" xml:lang="en-US"> It represents percentage of cumulative dividends payable in cash. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CustomerAAndBMember" xlink:to="peix_CustomerAAndBMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_CustomerAAndBMember_doc" xml:lang="en-US"> Information by name or description of a single external customer or a group of external customers. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CustomeraMember" xlink:to="peix_CustomeraMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_CustomeraMember_doc" xml:lang="en-US"> Information related to major customers. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CustomerbMember" xlink:to="peix_CustomerbMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_CustomerbMember_doc" xml:lang="en-US"> Information related to major customers. </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_CustomercMember" xlink:label="peix_CustomercMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CustomercMember" xlink:to="peix_CustomercMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_CustomercMember_doc" xml:lang="en-US"> Information related to major customers. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DebtDefaultLongtermDebtInterestRate" xlink:to="peix_DebtDefaultLongtermDebtInterestRate_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DebtDefaultLongtermDebtInterestRate_doc" xml:lang="en-US"> It represents percentage of debt default long-term debt interest. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DebtInstrumentRetiremntAmount" xlink:to="peix_DebtInstrumentRetiremntAmount_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DebtInstrumentRetiremntAmount_doc" xml:lang="en-US"> It represents value of debt instrument retiremnt. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DebtIssuedInIcpAcquisition" xlink:to="peix_DebtIssuedInIcpAcquisition_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DebtIssuedInIcpAcquisition_doc" xml:lang="en-US"> It represents value of Debt issued in LCP acquisition. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DecreasedGrossDeferredAssets" xlink:to="peix_DecreasedGrossDeferredAssets_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DecreasedGrossDeferredAssets_doc" xml:lang="en-US"> It represents value of decreased gross deferred assets. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DeferredFinancingFees" xlink:to="peix_DeferredFinancingFees_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DeferredFinancingFees_doc" xml:lang="en-US"> It represents as a deferred financing fees. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DeferredPolicyAcquisitionCostsDisclosurePolicyTextBlock" xlink:to="peix_DeferredPolicyAcquisitionCostsDisclosurePolicyTextBlock_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DeferredPolicyAcquisitionCostsDisclosurePolicyTextBlock_doc" xml:lang="en-US"> The tabular disclosure of deferred policy acquisaition cost. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DeferredTaxAssetsOtherPensionLiability" xlink:to="peix_DeferredTaxAssetsOtherPensionLiability_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DeferredTaxAssetsOtherPensionLiability_doc" xml:lang="en-US"> Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences pension liability. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DeferredTaxAssetsOtherRailcarContracts" xlink:to="peix_DeferredTaxAssetsOtherRailcarContracts_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DeferredTaxAssetsOtherRailcarContracts_doc" xml:lang="en-US"> Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences railcar contracts. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DeferredTaxLiabilitiesOtherDebtBasis" xlink:to="peix_DeferredTaxLiabilitiesOtherDebtBasis_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DeferredTaxLiabilitiesOtherDebtBasis_doc" xml:lang="en-US"> Amount of deferred tax liability attributable to taxable temporary differences debt basis. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionLiabilityAfterTax" xlink:to="peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionLiabilityAfterTax_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionLiabilityAfterTax_doc" xml:lang="en-US"> After tax amount of additional minimum pension liability not yet recognized as a net periodic pension cost. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionOtherLiabilityAfterTax" xlink:to="peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionOtherLiabilityAfterTax_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionOtherLiabilityAfterTax_doc" xml:lang="en-US"> After tax amount of additional minimum pension liability not yet recognized as a net periodic pension cost. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DefinedBenefitPlanAssetsFixedIncomeMember" xlink:to="peix_DefinedBenefitPlanAssetsFixedIncomeMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DefinedBenefitPlanAssetsFixedIncomeMember_doc" xml:lang="en-US"> Information related to defined benefit plan assets fixed income. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DefinedBenefitPlanAssetsIntlMember" xlink:to="peix_DefinedBenefitPlanAssetsIntlMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DefinedBenefitPlanAssetsIntlMember_doc" xml:lang="en-US"> Information related to defined benefit plan assets Intl. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DefinedBenefitPlanAssetsLargeMember" xlink:to="peix_DefinedBenefitPlanAssetsLargeMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DefinedBenefitPlanAssetsLargeMember_doc" xml:lang="en-US"> Information related to defined benefit plan assets large. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DefinedBenefitPlanAssetsMidMember" xlink:to="peix_DefinedBenefitPlanAssetsMidMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DefinedBenefitPlanAssetsMidMember_doc" xml:lang="en-US"> Information related to defined benefit plan assets mid. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DeliveringAndProcessingServicesFeesPerDollar" xlink:to="peix_DeliveringAndProcessingServicesFeesPerDollar_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DeliveringAndProcessingServicesFeesPerDollar_doc" xml:lang="en-US"> It represents per bushel price of delivering and processing services fees. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DerivativeFinancialInstrumentMember" xlink:to="peix_DerivativeFinancialInstrumentMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DerivativeFinancialInstrumentMember_doc" xml:lang="en-US"> Information related to derivative financial instrument. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DescriptionOfAgreementClosedTerm" xlink:to="peix_DescriptionOfAgreementClosedTerm_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DescriptionOfAgreementClosedTerm_doc" xml:lang="en-US"> Information related to agreement closed term. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DescriptionOfAgreementTermination" xlink:to="peix_DescriptionOfAgreementTermination_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DescriptionOfAgreementTermination_doc" xml:lang="en-US"> Information realted to agreement termination terms. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DescriptionOfAgreementTerms" xlink:to="peix_DescriptionOfAgreementTerms_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DescriptionOfAgreementTerms_doc" xml:lang="en-US"> Information realted to agreement terms. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DescriptionOfPaymentMadeToCompany" xlink:to="peix_DescriptionOfPaymentMadeToCompany_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DescriptionOfPaymentMadeToCompany_doc" xml:lang="en-US"> Description related to payment made to company. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DisallowedInterestDeferredtaxassets" xlink:to="peix_DisallowedInterestDeferredtaxassets_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DisallowedInterestDeferredtaxassets_doc" xml:lang="en-US"> It represents disallowed intrest deferred tax assets. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DiscriptionOfAdjustingRateForAssumedHealthCare" xlink:to="peix_DiscriptionOfAdjustingRateForAssumedHealthCare_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DiscriptionOfAdjustingRateForAssumedHealthCare_doc" xml:lang="en-US"> Description of adjusting rate for assumed health care. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DistillersGrainsMarketingAgreementsMember" xlink:to="peix_DistillersGrainsMarketingAgreementsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DistillersGrainsMarketingAgreementsMember_doc" xml:lang="en-US"> Information by category of arrangement, including but not limited to collaborative arrangements and non-collaborative arrangements. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsFairValueAdjustmentsAndWarrantInducements" xlink:to="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsFairValueAdjustmentsAndWarrantInducements_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsFairValueAdjustmentsAndWarrantInducements_doc" xml:lang="en-US"> Effective tax rate fair value adjustments and warrant inducements. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsNoncontrollingInterests" xlink:to="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsNoncontrollingInterests_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsNoncontrollingInterests_doc" xml:lang="en-US"> Effective tax rate non controlling interests. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance1" xlink:to="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance1_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance1_doc" xml:lang="en-US"> Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EffectiveIncomeTaxRateReconciliationChangeInFederalTaxAssetsValuationAllowance" xlink:to="peix_EffectiveIncomeTaxRateReconciliationChangeInFederalTaxAssetsValuationAllowance_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_EffectiveIncomeTaxRateReconciliationChangeInFederalTaxAssetsValuationAllowance_doc" xml:lang="en-US"> Percentage of domestic federal statutory tax rate applicable to pretax income (loss). </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EffectsOfInventoriesAndOpenContracts" xlink:to="peix_EffectsOfInventoriesAndOpenContracts_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_EffectsOfInventoriesAndOpenContracts_doc" xml:lang="en-US"> It represents value of effects of inventories and open contracts. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EmployeesCoveredByCollectiveBargainingAgreement" xlink:to="peix_EmployeesCoveredByCollectiveBargainingAgreement_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_EmployeesCoveredByCollectiveBargainingAgreement_doc" xml:lang="en-US"> Employees covered by collective bargaining agreement </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EmployeesMember" xlink:to="peix_EmployeesMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_EmployeesMember_doc" xml:lang="en-US"> Information related to employees. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EmploymentrelatedBenefitsPolicyTextBlock" xlink:to="peix_EmploymentrelatedBenefitsPolicyTextBlock_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_EmploymentrelatedBenefitsPolicyTextBlock_doc" xml:lang="en-US"> Employment related benefits [Policy Text Block] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EquityInEarningsLossesOfSubsidiaries" xlink:to="peix_EquityInEarningsLossesOfSubsidiaries_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_EquityInEarningsLossesOfSubsidiaries_doc" xml:lang="en-US"> Equity in earnings (losses) of subsidiaries </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolContractMember" xlink:to="peix_EthanolContractMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_EthanolContractMember_doc" xml:lang="en-US"> Information related to ethanol contract. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolMarketCapacityPerYear" xlink:to="peix_EthanolMarketCapacityPerYear_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_EthanolMarketCapacityPerYear_doc" xml:lang="en-US"> Ethanol market capacity per year </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolMarketingAgreementMember" xlink:to="peix_EthanolMarketingAgreementMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_EthanolMarketingAgreementMember_doc" xml:lang="en-US"> Information by category of arrangement, including but not limited to collaborative arrangements and non-collaborative arrangements. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolProductionCapacityPerYear" xlink:to="peix_EthanolProductionCapacityPerYear_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_EthanolProductionCapacityPerYear_doc" xml:lang="en-US"> Ethanol production capacity per year </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolProductionMember" xlink:to="peix_EthanolProductionMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_EthanolProductionMember_doc" xml:lang="en-US"> Ethanol Production [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolalcoholMember" xlink:to="peix_EthanolalcoholMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_EthanolalcoholMember_doc" xml:lang="en-US"> Infromation about the ethanolalchohol. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolalcoholSalesGrossMember" xlink:to="peix_EthanolalcoholSalesGrossMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_EthanolalcoholSalesGrossMember_doc" xml:lang="en-US"> The information about the ethanolalcohol sales gross. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolalcoholSalesNetMember" xlink:to="peix_EthanolalcoholSalesNetMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_EthanolalcoholSalesNetMember_doc" xml:lang="en-US"> The information about ethanolalcohol sales net. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ExercuisePricePerShareAbstract" xlink:to="peix_ExercuisePricePerShareAbstract_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ExercuisePricePerShareAbstract_doc" xml:lang="en-US"> Exercise price per share </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_FacilitiesAndPlanEquipmentMember" xlink:to="peix_FacilitiesAndPlanEquipmentMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_FacilitiesAndPlanEquipmentMember_doc" xml:lang="en-US"> Information related to facilities and plan equipment. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_FacilitiesAndPlantEquipmentMember" xlink:to="peix_FacilitiesAndPlantEquipmentMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_FacilitiesAndPlantEquipmentMember_doc" xml:lang="en-US"> Information by type of long-lived, physical assets used to produce goods and services and not intended for resale. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_FarmCredit1stServicesMember" xlink:to="peix_FarmCredit1stServicesMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_FarmCredit1stServicesMember_doc" xml:lang="en-US"> Information related to farm credit first services. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_FiveAccreditedInvestorsMember" xlink:to="peix_FiveAccreditedInvestorsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_FiveAccreditedInvestorsMember_doc" xml:lang="en-US"> Information related to five accredited investors. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_GrainProcurementExpenses" xlink:to="peix_GrainProcurementExpenses_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_GrainProcurementExpenses_doc" xml:lang="en-US"> Grain procurement expenses </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ICPMember" xlink:to="peix_ICPMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ICPMember_doc" xml:lang="en-US"> Information related to ICP. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IdahoMember" xlink:to="peix_IdahoMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_IdahoMember_doc" xml:lang="en-US"> Custom Element. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IllinoisCornProcessingLLCMember" xlink:to="peix_IllinoisCornProcessingLLCMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_IllinoisCornProcessingLLCMember_doc" xml:lang="en-US"> Information related to lllinois corn processing, llc. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IllinoisMember" xlink:to="peix_IllinoisMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_IllinoisMember_doc" xml:lang="en-US"> Information related to Illinois. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IncomeAllocatedToParticipatingSecurities" xlink:to="peix_IncomeAllocatedToParticipatingSecurities_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_IncomeAllocatedToParticipatingSecurities_doc" xml:lang="en-US"> Income allocated to participating securities </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IncreaseDecreaseAccountsPayableWithSubsidiaries" xlink:to="peix_IncreaseDecreaseAccountsPayableWithSubsidiaries_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_IncreaseDecreaseAccountsPayableWithSubsidiaries_doc" xml:lang="en-US"> Accounts payable with subsidiaries </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IncreaseDecreaseInAdditionalPaidInCapitalDueToAcquisition" xlink:to="peix_IncreaseDecreaseInAdditionalPaidInCapitalDueToAcquisition_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_IncreaseDecreaseInAdditionalPaidInCapitalDueToAcquisition_doc" xml:lang="en-US"> Increase (decrease) in additional paid in capital due to acquisition </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IncreaseOfAssetsAndLeaseLiabilities" xlink:to="peix_IncreaseOfAssetsAndLeaseLiabilities_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_IncreaseOfAssetsAndLeaseLiabilities_doc" xml:lang="en-US"> The amount of increase of assets and lease liabilities. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IndexedpriceContractsToSell" xlink:to="peix_IndexedpriceContractsToSell_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_IndexedpriceContractsToSell_doc" xml:lang="en-US"> Indexed-price contracts to sell </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IndexedpricePurchaseContracts" xlink:to="peix_IndexedpricePurchaseContracts_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_IndexedpricePurchaseContracts_doc" xml:lang="en-US"> Indexed-price purchase contracts </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IndianaMember" xlink:to="peix_IndianaMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_IndianaMember_doc" xml:lang="en-US"> Information related to Indiana. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IntercompanyAgreementsTextBlock" xlink:to="peix_IntercompanyAgreementsTextBlock_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_IntercompanyAgreementsTextBlock_doc" xml:lang="en-US"> Intercompany Agreements disclosure text block </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_InterestExpenseAddedToPlantTermDebt" xlink:to="peix_InterestExpenseAddedToPlantTermDebt_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_InterestExpenseAddedToPlantTermDebt_doc" xml:lang="en-US"> Interest expense added to plant term debt </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_InterestRateOnOutstandingBalanceOfAssessment" xlink:to="peix_InterestRateOnOutstandingBalanceOfAssessment_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_InterestRateOnOutstandingBalanceOfAssessment_doc" xml:lang="en-US"> The percentage represent interest rate on outstanding balance of assessment. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IntersegmentSalesMember" xlink:to="peix_IntersegmentSalesMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_IntersegmentSalesMember_doc" xml:lang="en-US"> information of intersegment sales. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_InventoryLowcarbonAndRinCreditsNetOfReserves" xlink:to="peix_InventoryLowcarbonAndRinCreditsNetOfReserves_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_InventoryLowcarbonAndRinCreditsNetOfReserves_doc" xml:lang="en-US"> It refrest to low carbon and RIN credit. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_IowaMember" xlink:to="peix_IowaMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_IowaMember_doc" xml:lang="en-US"> Information related to Iowa. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_KansasMember" xlink:to="peix_KansasMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_KansasMember_doc" xml:lang="en-US"> Information related to kansas. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_KinergyMarketingLLCMember" xlink:to="peix_KinergyMarketingLLCMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_KinergyMarketingLLCMember_doc" xml:lang="en-US"> Information related to kinergy marketing, llc. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_KinergyMarketingMember" xlink:to="peix_KinergyMarketingMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_KinergyMarketingMember_doc" xml:lang="en-US"> Information related to kinergy marketing. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_LineOfCreditFacilityInterestMarginRate" xlink:to="peix_LineOfCreditFacilityInterestMarginRate_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_LineOfCreditFacilityInterestMarginRate_doc" xml:lang="en-US"> It represents percentage of line of credit facility interest margin rate. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_LiquidityPolicyPolicyTextBlock" xlink:to="peix_LiquidityPolicyPolicyTextBlock_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_LiquidityPolicyPolicyTextBlock_doc" xml:lang="en-US"> Disclosure of accounting policy for liquidity. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ManagementFees" xlink:to="peix_ManagementFees_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ManagementFees_doc" xml:lang="en-US"> It represents the value of management fees. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_MarketingAndDistributionMember" xlink:to="peix_MarketingAndDistributionMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_MarketingAndDistributionMember_doc" xml:lang="en-US"> Information by business segments. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_MarketingMember" xlink:to="peix_MarketingMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_MarketingMember_doc" xml:lang="en-US"> The information of marketing. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_MaximumAmountOfFinanceToBeAmortizedUnderPropertyTaxAssessments" xlink:to="peix_MaximumAmountOfFinanceToBeAmortizedUnderPropertyTaxAssessments_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_MaximumAmountOfFinanceToBeAmortizedUnderPropertyTaxAssessments_doc" xml:lang="en-US"> The value represent maximum amount of finance to be amortized under property tax assessments. </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_MidwesternEthanolPlantsMember" xlink:label="peix_MidwesternEthanolPlantsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_MidwesternEthanolPlantsMember" xlink:to="peix_MidwesternEthanolPlantsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_MidwesternEthanolPlantsMember_doc" xml:lang="en-US"> The set of legal entities associated with a report. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_MinimumWorkingCapital" xlink:to="peix_MinimumWorkingCapital_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_MinimumWorkingCapital_doc" xml:lang="en-US"> It represents value of minimum working capital. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_MinnesotaMember" xlink:to="peix_MinnesotaMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_MinnesotaMember_doc" xml:lang="en-US"> Information related to minnesota. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_MissouriMember" xlink:to="peix_MissouriMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_MissouriMember_doc" xml:lang="en-US"> Information related to missouri. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_NebraskaMember" xlink:to="peix_NebraskaMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_NebraskaMember_doc" xml:lang="en-US"> Information related to nebraska. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_NewGrainProcurementAgreementMember" xlink:to="peix_NewGrainProcurementAgreementMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_NewGrainProcurementAgreementMember_doc" xml:lang="en-US"> Information by category of arrangement, including but not limited to collaborative arrangements and non-collaborative arrangements. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_NonEmployeesMember" xlink:to="peix_NonEmployeesMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_NonEmployeesMember_doc" xml:lang="en-US"> Information related to non employees. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_NonExpiringNonOperatingLosses" xlink:to="peix_NonExpiringNonOperatingLosses_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_NonExpiringNonOperatingLosses_doc" xml:lang="en-US"> Represents non expiring non operating losses. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_NonvotingCommonStockValue" xlink:to="peix_NonvotingCommonStockValue_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_NonvotingCommonStockValue_doc" xml:lang="en-US"> Nonvoting Common Stock Value. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_NotePurchaseAgreementMember" xlink:to="peix_NotePurchaseAgreementMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_NotePurchaseAgreementMember_doc" xml:lang="en-US"> Information by category of arrangement, including but not limited to collaborative arrangements and non-collaborative arrangements. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_NotesPayableOtherPayables1Member" xlink:to="peix_NotesPayableOtherPayables1Member_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_NotesPayableOtherPayables1Member_doc" xml:lang="en-US"> Information by type of debt instrument. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_NumberOfEthanolPlants" xlink:to="peix_NumberOfEthanolPlants_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_NumberOfEthanolPlants_doc" xml:lang="en-US"> Number of ethanol plants. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_NumberOfPlants" xlink:to="peix_NumberOfPlants_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_NumberOfPlants_doc" xml:lang="en-US"> It represents number of plants. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_OklahomaMember" xlink:to="peix_OklahomaMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_OklahomaMember_doc" xml:lang="en-US"> Information related to oklahoma. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_OregonMember" xlink:to="peix_OregonMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_OregonMember_doc" xml:lang="en-US"> Custom Element. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_OtherProductsProducedPerYear" xlink:to="peix_OtherProductsProducedPerYear_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_OtherProductsProducedPerYear_doc" xml:lang="en-US"> Other products produced per year </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PECentralMember" xlink:to="peix_PECentralMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_PECentralMember_doc" xml:lang="en-US"> Information related to PE central. </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_PEOpCoMember" xlink:label="peix_PEOpCoMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PEOpCoMember" xlink:to="peix_PEOpCoMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_PEOpCoMember_doc" xml:lang="en-US"> Information by type of related party. Related parties include, but not limited to, affiliates; other entities for which investments are accounted for by the equity method by the entity; trusts for benefit of employees; and principal owners, management, and members of immediate families. It also may include other parties with which the entity may control or can significantly influence the management or operating policies of the other to an extent that one of the transacting parties might be prevented from fully pursuing its own separate interests. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PacificAgProductsLLCMember" xlink:to="peix_PacificAgProductsLLCMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_PacificAgProductsLLCMember_doc" xml:lang="en-US"> Information related to pacific ag products, llc. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PacificAgProductsMember" xlink:to="peix_PacificAgProductsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_PacificAgProductsMember_doc" xml:lang="en-US"> Information related to pacific ag products [PAP]. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PacificAuroraLineOfCreditMember" xlink:to="peix_PacificAuroraLineOfCreditMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_PacificAuroraLineOfCreditMember_doc" xml:lang="en-US"> Information by consolidated entity or group of entities. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PacificAuroraMember" xlink:to="peix_PacificAuroraMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_PacificAuroraMember_doc" xml:lang="en-US"> Information related to pacific aurora. </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_PacificEthanolCentralPlantsMember" xlink:label="peix_PacificEthanolCentralPlantsMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PacificEthanolCentralPlantsMember" xlink:to="peix_PacificEthanolCentralPlantsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_PacificEthanolCentralPlantsMember_doc" xml:lang="en-US"> Pacific Ethanol Central Plants [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PacificEthanolPekinIncMember" xlink:to="peix_PacificEthanolPekinIncMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_PacificEthanolPekinIncMember_doc" xml:lang="en-US"> Information related to pacific ethanol pekin inc. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PacificEthanolWestPlantReceivable" xlink:to="peix_PacificEthanolWestPlantReceivable_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_PacificEthanolWestPlantReceivable_doc" xml:lang="en-US"> Pacific Ethanol West plant receivable </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ParentNotesPayableMember" xlink:to="peix_ParentNotesPayableMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ParentNotesPayableMember_doc" xml:lang="en-US"> Information related to parent notes payable. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PayablesToSubsidiaries" xlink:to="peix_PayablesToSubsidiaries_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_PayablesToSubsidiaries_doc" xml:lang="en-US"> Payables to subsidiaries </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PaymentsForInvestmentsInSubsidiaries" xlink:to="peix_PaymentsForInvestmentsInSubsidiaries_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_PaymentsForInvestmentsInSubsidiaries_doc" xml:lang="en-US"> Investments in subsidiaries </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PerCapitaCostOfCoveredBenefits" xlink:to="peix_PerCapitaCostOfCoveredBenefits_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_PerCapitaCostOfCoveredBenefits_doc" xml:lang="en-US"> Represent information about per capita cost of covered benefits. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PercentageOfPremedicarePostretirementMedicalBenefits" xlink:to="peix_PercentageOfPremedicarePostretirementMedicalBenefits_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_PercentageOfPremedicarePostretirementMedicalBenefits_doc" xml:lang="en-US"> It represents percentage of premedicare postretirement medical benefits. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Period1Member" xlink:to="peix_Period1Member_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_Period1Member_doc" xml:lang="en-US"> Information related to period. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Period2Member" xlink:to="peix_Period2Member_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_Period2Member_doc" xml:lang="en-US"> Information related to period. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Period3Member" xlink:to="peix_Period3Member_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_Period3Member_doc" xml:lang="en-US"> Information related to period. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Period4Member" xlink:to="peix_Period4Member_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_Period4Member_doc" xml:lang="en-US"> Information related to period. </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_Period5Member" xlink:label="peix_Period5Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Period5Member" xlink:to="peix_Period5Member_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_Period5Member_doc" xml:lang="en-US"> The member represent year, </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_Period6Member" xlink:label="peix_Period6Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Period6Member" xlink:to="peix_Period6Member_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_Period6Member_doc" xml:lang="en-US"> The member represent year, </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_Period7Member" xlink:label="peix_Period7Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Period7Member" xlink:to="peix_Period7Member_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_Period7Member_doc" xml:lang="en-US"> The member represent year, </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_Period8Member" xlink:label="peix_Period8Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Period8Member" xlink:to="peix_Period8Member_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_Period8Member_doc" xml:lang="en-US"> The member represent year, </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Plan2006Member" xlink:to="peix_Plan2006Member_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_Plan2006Member_doc" xml:lang="en-US"> Information related to plan 2006. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Plan2016Member" xlink:to="peix_Plan2016Member_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_Plan2016Member_doc" xml:lang="en-US"> Information related to plan 2016. </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_Post2017nonexpiringNOLSMember" xlink:label="peix_Post2017nonexpiringNOLSMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Post2017nonexpiringNOLSMember" xlink:to="peix_Post2017nonexpiringNOLSMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_Post2017nonexpiringNOLSMember_doc" xml:lang="en-US"> It represents the post 2017 non expiring nols member. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PostretirementPlanMember" xlink:to="peix_PostretirementPlanMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_PostretirementPlanMember_doc" xml:lang="en-US"> Information related to postretirement plan. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PreferredStockConvertibleIntoCommonSharesCommonShares" xlink:to="peix_PreferredStockConvertibleIntoCommonSharesCommonShares_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_PreferredStockConvertibleIntoCommonSharesCommonShares_doc" xml:lang="en-US"> Preferred stock convertible into common shares, common shares </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PreferredStockUndesignatedSharesAuthorized" xlink:to="peix_PreferredStockUndesignatedSharesAuthorized_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_PreferredStockUndesignatedSharesAuthorized_doc" xml:lang="en-US"> It represents number of shares of preferred stock undesignated shares authorized. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ProceedsFromIcpCreditFacilities" xlink:to="peix_ProceedsFromIcpCreditFacilities_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ProceedsFromIcpCreditFacilities_doc" xml:lang="en-US"> Proceeds from icp credit facilities. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ProjectAmortizedPeriod" xlink:to="peix_ProjectAmortizedPeriod_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ProjectAmortizedPeriod_doc" xml:lang="en-US"> The amount of projest amortized period. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PropertyAndEquipmentDepreciationUsefulLives" xlink:to="peix_PropertyAndEquipmentDepreciationUsefulLives_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_PropertyAndEquipmentDepreciationUsefulLives_doc" xml:lang="en-US"> Schedule of property and equipment useful lives. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PropertyTaxAssessmentMember" xlink:to="peix_PropertyTaxAssessmentMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_PropertyTaxAssessmentMember_doc" xml:lang="en-US"> It represents property tax assessment. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PurchaseOfPeOpCo.Debt" xlink:to="peix_PurchaseOfPeOpCo.Debt_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_PurchaseOfPeOpCo.Debt_doc" xml:lang="en-US"> Purchase of PE OP Co. debt </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PurchasesFromExternalCustomersTableTextBlock" xlink:to="peix_PurchasesFromExternalCustomersTableTextBlock_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_PurchasesFromExternalCustomersTableTextBlock_doc" xml:lang="en-US"> Purchases from external customers table text block. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ReclassOfWarrantLiabilityToEquityUponWarrantExercises" xlink:to="peix_ReclassOfWarrantLiabilityToEquityUponWarrantExercises_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ReclassOfWarrantLiabilityToEquityUponWarrantExercises_doc" xml:lang="en-US"> Reclass of warrant liability to equity upon warrant exercises </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ReductionInNoncontrollingInterest" xlink:to="peix_ReductionInNoncontrollingInterest_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ReductionInNoncontrollingInterest_doc" xml:lang="en-US"> Reduction in noncontrolling interest </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_RemainingNetOperatingLossCarryforwards" xlink:to="peix_RemainingNetOperatingLossCarryforwards_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_RemainingNetOperatingLossCarryforwards_doc" xml:lang="en-US"> It represents remaining net operating loss carryforwards. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_RetirementPlanMember" xlink:to="peix_RetirementPlanMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_RetirementPlanMember_doc" xml:lang="en-US"> Information related to retirement plan. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_RevisedEffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate" xlink:to="peix_RevisedEffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_RevisedEffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_doc" xml:lang="en-US"> Percentage of domestic federal statutory tax rate applicable to pretax income (loss). </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_SalesCommitments" xlink:to="peix_SalesCommitments_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_SalesCommitments_doc" xml:lang="en-US"> Sales commitments </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ScheduleOfComponentsOfJurisdictionAndVariousStateJurisdictionsIncomeTaxExpenseBenefitTableTextBlock" xlink:to="peix_ScheduleOfComponentsOfJurisdictionAndVariousStateJurisdictionsIncomeTaxExpenseBenefitTableTextBlock_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ScheduleOfComponentsOfJurisdictionAndVariousStateJurisdictionsIncomeTaxExpenseBenefitTableTextBlock_doc" xml:lang="en-US"> Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ScheduleOfFutureMinimumLeasePaymentsCapitalAndOperatingLeasesTableTextBlock" xlink:to="peix_ScheduleOfFutureMinimumLeasePaymentsCapitalAndOperatingLeasesTableTextBlock_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ScheduleOfFutureMinimumLeasePaymentsCapitalAndOperatingLeasesTableTextBlock_doc" xml:lang="en-US"> Schedule of future minimum lease payments - Capital and Operating Leases [Table Text Block] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_SecondNotePurchaseAgreementMember" xlink:to="peix_SecondNotePurchaseAgreementMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_SecondNotePurchaseAgreementMember_doc" xml:lang="en-US"> Information related to the agreement. </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_SolarProjectMember" xlink:label="peix_SolarProjectMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_SolarProjectMember" xlink:to="peix_SolarProjectMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_SolarProjectMember_doc" xml:lang="en-US"> Information related to solar project. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_StatementsOfCashFlowsParentCompanyOnlyTableTextBlock" xlink:to="peix_StatementsOfCashFlowsParentCompanyOnlyTableTextBlock_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_StatementsOfCashFlowsParentCompanyOnlyTableTextBlock_doc" xml:lang="en-US"> Parent company financials - Statements of Cash Flows [Table Text Block] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_StatementsOfOperationsParentCompanyOnlyTableTextBlock" xlink:to="peix_StatementsOfOperationsParentCompanyOnlyTableTextBlock_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_StatementsOfOperationsParentCompanyOnlyTableTextBlock_doc" xml:lang="en-US"> Parent company financials - Statements of Operations [Table Text Block] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_StockIssuedDuringPeriodSharesNewIssues3" xlink:to="peix_StockIssuedDuringPeriodSharesNewIssues3_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_StockIssuedDuringPeriodSharesNewIssues3_doc" xml:lang="en-US"> Number of new stock issued during the period. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_StockIssuedDuringPeriodValueNewIssues3" xlink:to="peix_StockIssuedDuringPeriodValueNewIssues3_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_StockIssuedDuringPeriodValueNewIssues3_doc" xml:lang="en-US"> Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_StockOptionAwardOneMember" xlink:to="peix_StockOptionAwardOneMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_StockOptionAwardOneMember_doc" xml:lang="en-US"> Custom Element. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_StockOptionAwardTwoMember" xlink:to="peix_StockOptionAwardTwoMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_StockOptionAwardTwoMember_doc" xml:lang="en-US"> Custom Element. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_StockbasedCompensationExpenseRestrictedStockAndOptionsToEmployeesAndDirectorsNetOfCancellationsShares" xlink:to="peix_StockbasedCompensationExpenseRestrictedStockAndOptionsToEmployeesAndDirectorsNetOfCancellationsShares_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_StockbasedCompensationExpenseRestrictedStockAndOptionsToEmployeesAndDirectorsNetOfCancellationsShares_doc" xml:lang="en-US"> Stock-based compensation expense - restricted stock and options to employees and directors, net of cancellations, shares </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_SubsequentDebtInstrumentCovenantDescription" xlink:to="peix_SubsequentDebtInstrumentCovenantDescription_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_SubsequentDebtInstrumentCovenantDescription_doc" xml:lang="en-US"> Description of subsequent debt instrument covenant. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_SupplierCMember" xlink:to="peix_SupplierCMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_SupplierCMember_doc" xml:lang="en-US"> Information related to major supplier. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_SupplierDMember" xlink:to="peix_SupplierDMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_SupplierDMember_doc" xml:lang="en-US"> Information related to major supplier. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_SupplieraMember" xlink:to="peix_SupplieraMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_SupplieraMember_doc" xml:lang="en-US"> Information related to major supplier. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_SupplierbMember" xlink:to="peix_SupplierbMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_SupplierbMember_doc" xml:lang="en-US"> Information related to major supplier. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_SuppliersMember" xlink:to="peix_SuppliersMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_SuppliersMember_doc" xml:lang="en-US"> It represents related party. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_TaxYearsStillOpenToAudit" xlink:to="peix_TaxYearsStillOpenToAudit_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_TaxYearsStillOpenToAudit_doc" xml:lang="en-US"> Tax Years still open to audit </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_TermLoan1Member" xlink:to="peix_TermLoan1Member_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_TermLoan1Member_doc" xml:lang="en-US"> Information by type of debt instrument. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_TermLoanMember" xlink:to="peix_TermLoanMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_TermLoanMember_doc" xml:lang="en-US"> Information related to term loan. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_TexasMember" xlink:to="peix_TexasMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_TexasMember_doc" xml:lang="en-US"> Information related to texas. </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_ThereafterMember" xlink:label="peix_ThereafterMember"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ThereafterMember" xlink:to="peix_ThereafterMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ThereafterMember_doc" xml:lang="en-US"> Information related to after fifth year. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_TotalExpectedBenefitPayments" xlink:to="peix_TotalExpectedBenefitPayments_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_TotalExpectedBenefitPayments_doc" xml:lang="en-US"> Total expected benefit payments </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WarrantExercisesSharesIssued" xlink:to="peix_WarrantExercisesSharesIssued_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_WarrantExercisesSharesIssued_doc" xml:lang="en-US"> Warrant exercises, shares issued </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WarrantInducements" xlink:to="peix_WarrantInducements_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_WarrantInducements_doc" xml:lang="en-US"> Warrant inducements </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WarrantsExercised" xlink:to="peix_WarrantsExercised_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_WarrantsExercised_doc" xml:lang="en-US"> Warrants exercised </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WarrantsExpired" xlink:to="peix_WarrantsExpired_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_WarrantsExpired_doc" xml:lang="en-US"> Warrants expired </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WarrantsIssued" xlink:to="peix_WarrantsIssued_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_WarrantsIssued_doc" xml:lang="en-US"> Warrants issued </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WeightedAverageExercisePriceWarrantsExercised" xlink:to="peix_WeightedAverageExercisePriceWarrantsExercised_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_WeightedAverageExercisePriceWarrantsExercised_doc" xml:lang="en-US"> Weighted average exercise price warrants exercised </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WeightedAverageExercisePriceWarrantsExpired" xlink:to="peix_WeightedAverageExercisePriceWarrantsExpired_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_WeightedAverageExercisePriceWarrantsExpired_doc" xml:lang="en-US"> It represents weighted average exercise price warrants expired. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WeightedAverageExercisePriceWarrantsIssued" xlink:to="peix_WeightedAverageExercisePriceWarrantsIssued_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_WeightedAverageExercisePriceWarrantsIssued_doc" xml:lang="en-US"> Weighted average exercise price warrants issued </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WeightedAverageExercisePriceWarrantsOutstanding" xlink:to="peix_WeightedAverageExercisePriceWarrantsOutstanding_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_WeightedAverageExercisePriceWarrantsOutstanding_doc" xml:lang="en-US"> Weighted average exercise price warrants outstanding </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_WesternSugarMember" xlink:to="peix_WesternSugarMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_WesternSugarMember_doc" xml:lang="en-US"> Information related to western sugar. </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_Year2017Member" xlink:label="peix_Year2017Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Year2017Member" xlink:to="peix_Year2017Member_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_Year2017Member_doc" xml:lang="en-US"> Information related to current year. </link:label>
<link:loc xlink:type="locator" xlink:href="peix-20190930.xsd#peix_Year2018Member" xlink:label="peix_Year2018Member"/>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Year2018Member" xlink:to="peix_Year2018Member_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_Year2018Member_doc" xml:lang="en-US"> Information related to second year. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Year2019Member" xlink:to="peix_Year2019Member_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_Year2019Member_doc" xml:lang="en-US"> Information related to third year. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Year2020Member" xlink:to="peix_Year2020Member_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_Year2020Member_doc" xml:lang="en-US"> Information related to fourth year. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Year2021Member" xlink:to="peix_Year2021Member_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_Year2021Member_doc" xml:lang="en-US"> Information related to fifth year. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Year2022Member" xlink:to="peix_Year2022Member_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_Year2022Member_doc" xml:lang="en-US"> The information related to 2022. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_Year2023Member" xlink:to="peix_Year2023Member_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_Year2023Member_doc" xml:lang="en-US"> The information related to 2023. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DebtInstrumentFaceAmount1" xlink:to="peix_DebtInstrumentFaceAmount1_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DebtInstrumentFaceAmount1_doc" xml:lang="en-US"> Face (par) amount of debt instrument at time of issuance. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DecsriptionOfMaintainWorkingCapital" xlink:to="peix_DecsriptionOfMaintainWorkingCapital_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_DecsriptionOfMaintainWorkingCapital_doc" xml:lang="en-US"> Information pertaining to maintain working capital. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolSalesContractsMember" xlink:to="peix_EthanolSalesContractsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_EthanolSalesContractsMember_doc" xml:lang="en-US"> Ethanol Sales Contracts [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_CoproductsSalesContractsMember" xlink:to="peix_CoproductsSalesContractsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_CoproductsSalesContractsMember_doc" xml:lang="en-US"> Co-products Sales Contracts [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_EthanolPurchaseContractsMember" xlink:to="peix_EthanolPurchaseContractsMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_EthanolPurchaseContractsMember_doc" xml:lang="en-US"> Ethanol Purchase Contracts [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ContributionsToSubsidiaries" xlink:to="peix_ContributionsToSubsidiaries_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ContributionsToSubsidiaries_doc" xml:lang="en-US"> Represents contribution to subsidiaries. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ProceedsFromCogenContractAmendment" xlink:to="peix_ProceedsFromCogenContractAmendment_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ProceedsFromCogenContractAmendment_doc" xml:lang="en-US"> Proceeds from CoGen contract amendment. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_InitialRightOfUseAssetsAndLiabilitiesRecordedUnderAsc842" xlink:to="peix_InitialRightOfUseAssetsAndLiabilitiesRecordedUnderAsc842_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_InitialRightOfUseAssetsAndLiabilitiesRecordedUnderAsc842_doc" xml:lang="en-US"> Initial right of use assets and liabilities recorded under ASC 842. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_LandRelatedMember" xlink:to="peix_LandRelatedMember_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_LandRelatedMember_doc" xml:lang="en-US"> Represents land related member. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_RightOfAssetsAndOperatingLeaseLiability" xlink:to="peix_RightOfAssetsAndOperatingLeaseLiability_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_RightOfAssetsAndOperatingLeaseLiability_doc" xml:lang="en-US"> The information related to right of assets and operating lease liability. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_ScheduleOfInventoryTableTextBlock" xlink:to="peix_ScheduleOfInventoryTableTextBlock_doc" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="peix_ScheduleOfInventoryTableTextBlock_doc" xml:lang="en-US"> Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for sale or to be used in manufacturing, servicing or production process. </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_KinergyMarketingLLCMember" xlink:to="peix_KinergyMarketingLLCMember_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_KinergyMarketingLLCMember_3_lbl" xml:lang="en-US"> KinergyMarketingLLCMember </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_PacificAgProductsLLCMember" xlink:to="peix_PacificAgProductsLLCMember_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_PacificAgProductsLLCMember_3_lbl" xml:lang="en-US"> FacilitiesAndPlantEquipmentMember </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PostemploymentRetirementBenefitsMember" xlink:to="us-gaap_PostemploymentRetirementBenefitsMember_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PostemploymentRetirementBenefitsMember_2_lbl" xml:lang="en-US"> Postemployment Retirement Benefits [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPostretirementLifeInsuranceMember" xlink:to="us-gaap_DefinedBenefitPostretirementLifeInsuranceMember_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPostretirementLifeInsuranceMember_2_lbl" xml:lang="en-US"> Postretirement Life Insurance [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PostretirementBenefitCostsMember" xlink:to="us-gaap_PostretirementBenefitCostsMember_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PostretirementBenefitCostsMember_2_lbl" xml:lang="en-US"> Postretirement Benefit Costs [Member] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsCurrent" xlink:to="us-gaap_AssetsCurrent_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AssetsCurrent_3_lbl" xml:lang="en-US"> Assets, Current </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssets" xlink:to="us-gaap_OtherAssets_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAssets_2_lbl" xml:lang="en-US"> Other Assets </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeInstrumentsAndHedgesLiabilities" xlink:to="us-gaap_DerivativeInstrumentsAndHedgesLiabilities_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DerivativeInstrumentsAndHedgesLiabilities_2_lbl" xml:lang="en-US"> Derivative Instruments and Hedges, Liabilities </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesCurrent" xlink:to="us-gaap_LiabilitiesCurrent_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesCurrent_3_lbl" xml:lang="en-US"> Liabilities, Current </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_4_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_4_lbl" xml:lang="en-US"> Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:to="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_2_lbl" xml:lang="en-US"> Net Income (Loss) Attributable to Noncontrolling Interest </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPreferredStock" xlink:to="us-gaap_DividendsPreferredStock_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsPreferredStock_3_lbl" xml:lang="en-US"> Dividends, Preferred Stock </link:label>
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<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInOtherCurrentAssets_3_lbl" xml:lang="en-US"> Increase (Decrease) in Other Current Assets </link:label>
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<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsForProceedsFromOtherDeposits_2_lbl" xml:lang="en-US"> Payments for (Proceeds from) Other Deposits </link:label>
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<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock" xlink:to="us-gaap_PaymentsOfDividendsPreferredStockAndPreferenceStock_2_lbl" xlink:type="arc"/>
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<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfOtherDebt" xlink:to="us-gaap_RepaymentsOfOtherDebt_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RepaymentsOfOtherDebt_2_lbl" xml:lang="en-US"> Repayments of Other Debt </link:label>
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<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RepaymentsOfSeniorDebt_2_lbl" xml:lang="en-US"> Repayments of Senior Debt </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsOfDebtIssuanceCosts" xlink:to="us-gaap_PaymentsOfDebtIssuanceCosts_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsOfDebtIssuanceCosts_2_lbl" xml:lang="en-US"> Payments of Debt Issuance Costs </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesOutstanding" xlink:to="us-gaap_SharesOutstanding_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharesOutstanding_3_lbl" xml:lang="en-US"> Shares, Outstanding </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InventoryPolicyTextBlock" xlink:to="us-gaap_InventoryPolicyTextBlock_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InventoryPolicyTextBlock_2_lbl" xml:lang="en-US"> Inventory, Policy [Policy Text Block] </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory_2_lbl" xml:lang="en-US"> Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_2_lbl" xml:lang="en-US"> Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_2_lbl" xml:lang="en-US"> Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther" xlink:to="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther_2_lbl" xml:lang="en-US"> Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GeneralAndAdministrativeExpense" xlink:to="us-gaap_GeneralAndAdministrativeExpense_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GeneralAndAdministrativeExpense_2_lbl" xml:lang="en-US"> General and Administrative Expense </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:to="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_2_lbl" xml:lang="en-US"> Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnamortizedDebtIssuanceExpense" xlink:to="us-gaap_UnamortizedDebtIssuanceExpense_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UnamortizedDebtIssuanceExpense_2_lbl" xml:lang="en-US"> Unamortized Debt Issuance Expense </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_2_lbl" xml:lang="en-US"> Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_2_lbl" xml:lang="en-US"> Long-term Debt, Maturities, Repayments of Principal in Year Two </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_2_lbl" xml:lang="en-US"> Long-term Debt, Maturities, Repayments of Principal in Year Three </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_2_lbl" xml:lang="en-US"> Long-term Debt, Maturities, Repayments of Principal in Year Four </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_2_lbl" xml:lang="en-US"> Long-term Debt, Maturities, Repayments of Principal in Year Five </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets" xlink:to="us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets_3_lbl" xml:lang="en-US"> Defined Benefit Plan, Pension Plan with Projected Benefit Obligation in Excess of Plan Assets, Plan Assets </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid" xlink:to="us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid_2_lbl" xlink:type="arc"/>
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<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionOtherLiabilityAfterTax" xlink:to="peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionOtherLiabilityAfterTax_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionOtherLiabilityAfterTax_3_lbl" xml:lang="en-US"> Payment Date December 23, 2014 </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo" xlink:to="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_2_lbl" xml:lang="en-US"> Defined Benefit Plan, Expected Future Benefit Payment, Year Two </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree" xlink:to="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_2_lbl" xml:lang="en-US"> Defined Benefit Plan, Expected Future Benefit Payment, Year Three </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour" xlink:to="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_2_lbl" xml:lang="en-US"> Defined Benefit Plan, Expected Future Benefit Payment, Year Four </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive" xlink:to="us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_2_lbl" xlink:type="arc"/>
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<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionLiabilityAfterTax" xlink:to="peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionLiabilityAfterTax_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionLiabilityAfterTax_3_lbl" xml:lang="en-US"> DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeOtherMinimumPensionLiabilityAfterTax </link:label>
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<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:to="us-gaap_EffectiveIncomeTaxRateContinuingOperations_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EffectiveIncomeTaxRateContinuingOperations_2_lbl" xml:lang="en-US"> Effective Income Tax Rate Reconciliation, Percent </link:label>
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<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxAssetsGross" xlink:to="us-gaap_DeferredTaxAssetsGross_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredTaxAssetsGross_2_lbl" xml:lang="en-US"> Deferred Tax Assets, Gross </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment" xlink:to="us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_2_lbl" xlink:type="arc"/>
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<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets" xlink:to="us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_2_lbl" xlink:type="arc"/>
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<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="peix_WeightedAverageExercisePriceWarrantsExpired_3_lbl" xml:lang="en-US"> WeightedAverageExercisePriceWarrantsExpired </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_3_lbl" xlink:type="arc"/>
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<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1" xlink:to="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_3_lbl" xml:lang="en-US"> Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1" xlink:to="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_2_lbl" xml:lang="en-US"> Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_3_lbl" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_2_lbl" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_2_lbl" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_3_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_3_lbl" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_2_lbl" xml:lang="en-US"> Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent" xlink:to="us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_2_lbl" xlink:type="arc"/>
<link:label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent_2_lbl" xml:lang="en-US"> Capital Leases, Future Minimum Payments Due, Next Twelve Months </link:label>
<link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears" xlink:to="us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears_2_lbl" xlink:type="arc"/>
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2 Subsequent Filings that Reference this Filing

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 3/26/21  Alto Ingredients, Inc.            10-K       12/31/20  107:9.1M                                   EdgarAgents LLC/FA
 1/28/20  SEC                               UPLOAD3/05/20    2:39K  Alto Ingredients, Inc.
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