Proposed Amendments to the Alternative Fuel Conversion Certification Procedures for On-Road Motor Vehicles and Engines

This page last reviewed December 5, 2013

Background

California Air Resources Board (ARB) staff is proposing amendments to the alternative fuel conversion certification procedures for both new and in-use vehicles and engines. California regulations prohibit the conversion of previously ARB certified vehicles and engines to operate on an alternative fuel, such as natural gas or propane, in lieu of the original gasoline or diesel fuel unless the conversion has been evaluated and certified by ARB. In response to comments received, ARB staff proposed changes to the procedures used to certify conversions of on-road motor vehicles and engines to use alternative fuels.

For more information about the current alternative fuel conversion certification procedures for new and in-use on-road vehicles and engines, please go here.

What's New

December 5, 2013:

The 15-Day Notice of Public Availability of Modified Text has been posted and is available for viewing at our Rulemaking Activity web page. Written comments on the modified text may be submitted by postal mail or electronic mail as indicated on the notice.

November 12, 2013:

The following material will accompany the alternative fuel retrofit system certification workshop to be held on November 12, 2013. See the October 17, 2013 notice below. For those unable to attend in person, this workshop will be available by webinar. To participate in the webinar to take place on Tuesday, November 12, 2013 from 1:00 p.m. to 3:00 p.m. (PST), follow the link for registration and sign in <HERE>.
  • Workshop Presentation (PDF - 150K)
  • Workshop Presentation, OBD II Specific (PDF - 419K)
  • Alternative Fuel Retrofit System Certification Request Based on New Alternative Fuel Certification Vehicle or Engine Certification (PDF - 56K)
  • DMS Directory Structure (PDF - 167K)
  • DMS File and Workflow Naming Convention (PDF - 202K)
  • Recommended Certification Application Format for 2004 Model Year and Later Alternative Fuel Retrofit Systems (PDF - 98K)

October 17, 2013:

The Air Resources Board staff invites you to participate in a public workshop on Tuesday, November 12, to clarify ARB's certification requirements regarding conversion of 2004 and later model year vehicles and engines to operate on alternative fuels. Vehicle and engine manufacturers and other interested parties are welcome to participate. Please view the workshop notice

September 26, 2013:

The Board held a public meeting to hear the proposed amendments to the Alternative Fuel Conversion Certification Procedures for On-Road Motor Vehicles and Engines. The Board approved a resolution to direct staff to move forward with the proposed amendments with minor changes.

August 7, 2013:

The public hearing notice and staff report for proposed amendments to the Alternative Fuel Conversion Certification Procedures for On-Road Motor Vehicles and Engines have been posted on the Rulemaking Activity web page. The Air Resources Board will conduct a public hearing on this item in Sacramento on September 26 or 27, 2013. Comments on the proposed amendments to Alternative Fuel Conversion Certification Procedures for On-Road Motor Vehicles and Engines may be submitted here.

May 1, 2013:

The Air Resources Board will conduct a public workshop in El Monte, California to discuss proposed amendments to the alternative fuel conversion certification procedures for new and in-use vehicles and engines. See Mail-out MSC 13-11 below.

January 22, 2013:

The Air Resources Board conducted a public workshop in El Monte, California to discuss proposed amendments to the alternative fuel conversion certification procedures for new and in-use vehicles and engines. See Mail-out MSC 12-27 below.
  • Workshop Notice (PDF - 92K)
  • Workshop Presentation (PDF - 226K)
  • Letter from ARB to Mr. Peter F. Ward, Principal, Alternative Fuels Advocates, LLC, "Streamlining of Certain Natural Gas / Propane Vehicle and Engine Certification Procedures." (PDF - 792K)
  • Letter from ARB to Mr. Tim Carmichael, President, California Natural Gas Vehicle Coalition, "Suggested Improvements To ARB's Certification and OBD Requirements for NGVs From Small Volume Manufacturers." (PDF - 409K)

August 14, 2012:

The Air Resources Board conducted a public workshop to discuss current alternate fuel conversion requirements for new and used vehicles and engines used in such vehicles. See Mail-out MSO 2012-02 below.
  • MSO 2012-02, Public Workshop to Discuss Current Alternate Fuel Conversion Requirements for New and Used Vehicles and Engines used in Such Vehicles (PDF - 47K)
  • Workshop Slide Presentation (PDF - 1.97M)
  • Workshop Slide Presentation, OBD II Specific (PDF - 586K)
  • Draft Guidelines for Alternate Fuel Vehicle OBD II Certification
    1. Here will you find the DRAFT "Guidelines for Alternate Fuel Vehicle On-Board Diagnostic II (OBD II) Certification" mail-out that was made available at the ARB public workshop concerning the current alternate fuel conversion requirements for new and used vehicles and engines used in such vehicles (held on August 14, 2012). Please note that this is not the finalized "official" ARB mail-out that will be released by ARB at a later date. (PDF - 144K)
    2. Summary of California and U.S. EPA certification requirements for new and aftermarket alternative fuel conversions. (PDF - 22K)

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