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 September 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.
 
     
Dated: November 20, 2006
 By:  
/s/ NEIL M. KOEHLER                                                          
 
Neil M. Koehler
Chief Executive Officer (principal executive officer)
   
 
     
Dated: November 20, 2006
 By:  
/s/ WILLIAM G. LANGLEY                                                 
 
William G. Langley
Chief Financial Officer (principal financial officer)
   
 
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.