Consent of Independent Registered Public
To the Board of Directors
Pacific Ethanol, Inc.
We consent to the incorporation
by reference in Registration Statement (Nos. 333-137663, 333-169002, 333-176540, 333-185884, 333-189478, 333-196876, and 333-212070)
on Form S-8 and (Nos. 333-178685, 333-180731 and 333-195364) on Form S-3 and (No. 333-201879) on Form S-4, of Pacific Ethanol,
Inc. of our report dated March 16, 2015, relating to our audit of the consolidated financial statements for the year ended December
31, 2014, which appears in this Annual Report on Form 10-K of Pacific Ethanol, Inc. for the year ended December 31, 2016.
/s/ Hein & Associates LLP
Hein & Associates LLP
March 15, 2017