EXHIBIT
      32.1
    
     
    CERTIFICATION
      OF 
     
    CHIEF
      EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER
     
    PURSUANT
      TO 18 U.S.C. SECTION 1350,
     
    AS
      ADOPTED PURSUANT TO
     
    SECTION
      906 OF THE SARBANES-OXLEY ACT OF 2002
     
    In
      connection with the quarterly report on Form 10-Q of Pacific Ethanol, Inc.
      (the
“Company”) for the period ended June 30, 2006 (the “Report”), the undersigned
      hereby certify in their capacities as Chief Executive Officer and Chief
      Financial Officer of the Company, respectively, pursuant to 18 U.S.C.
      section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act
      of
      2002, that:
     
    1. the
      Report fully complies with the requirements of Section 13(a) or 15(d) of the
      Securities Exchange Act of 1934, as amended; and
     
    2. the
      information contained in the Report fairly presents, in all material respects,
      the financial condition and results of operations of the Company.
     
    
      
          
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            | Dated:
              August 17, 2006 | 
            By:   | 
            /s/ NEIL
              M.
              KOEHLER | 
          
          
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               Neil
                M.
                Koehler 
              Chief Executive Officer (principal executive
                officer) 
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              | Dated:
                August 17, 2006 | 
              By:   | 
              /s/ WILLIAM
                G. LANGLEY | 
            
            
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                 William
                  G. Langley 
                Chief Financial Officer (principal financial
                  officer) 
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    A
      signed original of this written statement required by Section 906, or other
      document authenticating, acknowledging, or otherwise adopting the signatures
      that appear in typed form within the electronic version of this written
      statement required by Section 906, has been provided to the Company and will
      be
      retained by the Company and furnished to the Securities and Exchange Commission
      or its staff upon request.