On-Board Diagnostic System Requirements (OBD II & HD OBD)

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This page last reviewed November 22, 2022

Proposed Revisions to the On-Board Diagnostic System Requirements and Associated Enforcement Provisions for Passenger Cars, Light-Duty Trucks, Medium-Duty Vehicles and Engines, and Heavy-Duty Engines

Hearing Date(s)
Public Comments Received
Final Approval / OAL Action

OAL approved the rulemaking and filed with Secretary of State on November 22, 2022. The effective date is November 22, 2022.

Final Regulation Order - OBD II Regulation, Title 13, California Code of Regulations, Section 1968.2, Malfunction and Diagnostic System Requirements 2004 and Subsequent Model Year Passenger Cars, Light Duty Trucks, and Medium Duty Vehicles and Engines
Final Regulation Order - OBD II Enforcement Regulation Title 13, California Code of Regulations, Section 1968.5, Enforcement of Malfunction and Diagnostic System Requirements for 2004 and Subsequent Model Year Passenger Cars, Light Duty Trucks, and Medium Duty Vehicles and Engines
Final Regulation Order - HD OBD Regulation, Title 13, California Code of Regulations, Section 1971.1, On-Board Diagnostic System Requirements 2010 and Subsequent Model Year Heavy-Duty Engines
Addendum to the Final Statement of Reasons
Adopted Regulations and Materials Submitted to OAL

The final rulemaking package was submitted to OAL on July 20, 2022

Final Statement of Reasons
Executive Order
Final Regulation Order - OBD II Regulation, Title 13, California Code of Regulations, Section 1968.2, Malfunction and Diagnostic System Requirements 2004 and Subsequent Model Year Passenger Cars, Light Duty Trucks, and Medium Duty Vehicles and Engines  ~See Revised Above~
Final Regulation Order - OBD II Enforcement Regulation Title 13, California Code of Regulations, Section 1968.5, Enforcement of Malfunction and Diagnostic System Requirements for 2004 and Subsequent Model Year Passenger Cars, Light Duty Trucks, and Medium Duty Vehicles and Engines
 ~See Revised Above~
Final Regulation Order - HD OBD Regulation, Title 13, California Code of Regulations, Section 1971.1, On-Board Diagnostic System Requirements 2010 and Subsequent Model Year Heavy-Duty Engines  ~See Revised Above~
Final Regulation Order Regulation Order - HD OBD Enforcement Regulation, Title 13, California Code of Regulations, Section 1971.5, Enforcement of Malfunction and Diagnostic System Requirements for 2010 and Subsequent Model Year Heavy-Duty Engines
Data Record Reporting Procedures for Over-the-Air Reprogrammed Vehicles and Engines Using SAE J1979-2
Updated Informative Digest
Request for Early Effective Date
Hearing Action and Supplemental 15 Day Notices
Posted
Second Notice of Public Availability of Modified Text  (Deadline to comment: May 9, 2022)
Attachment A: Proposed Second 15-Day Modified Regulation Order, OBD Regulations Title 13, California Code of Regulations, Sections 1968.2 and 1971.1
Posted
Notice of Public Availability of Modified Text and Availability of Additional Documents and/or Information  (Deadline to comment: March 2, 2022)
Attachment A: Proposed 15-Day Modified Regulation Order, OBD II Regulations, Title 13, California Code of Regulations, Sections 1968.2 and 1968.5,
Attachment B: Proposed 15-Day Modified Regulation Order, HD OBD Regulations, Title 13, California Code of Regulations, Sections 1971.1 and 1971.5
Attachment C: Updates to Appendix E: Data Record Reporting Procedures for Over-the-Air Reprogrammed Vehicles and Engines Using SAE J1979-2
Attachment D: Addendum to the Initial Statement of Reasons for the Public Hearing to Consider the Proposed Revisions to the On-Board Diagnostic System Requirements and Associated Enforcement Provisions for Passenger Cars, Light-Duty Trucks, Medium-Duty Vehicles and Engines, and Heavy-Duty Engines
Resolution 21-15
Public Hearing Notice and Related Material
Posted
Notice of Public Hearing  (Deadline to Submit Public Comments: July 19, 2021, or during the Public Hearing on July 22, 2021)
Staff Report: Initial Statement of Reasons (ISOR)
Appendix A: Proposed Regulation Order - OBD II Regulation, Title 13, California Code of Regulations, Section 1968.2, Malfunction and Diagnostic System Requirements 2004 and Subsequent Model Year Passenger Cars, Light Duty Trucks, and Medium Duty Vehicles and Engines
Appendix B: Proposed Regulation Order - OBD II Enforcement Regulation, Title 13, California Code of Regulations, Section 1968.5, Enforcement of Malfunction and Diagnostic System Requirements for 2004 and Subsequent Model Year Passenger Cars, Light Duty Trucks, and Medium Duty Vehicles and Engines
Appendix C: Proposed Regulation Order - HD OBD Regulation, Title 13, California Code of Regulations, Section 1971.1, On-Board Diagnostic System Requirements 2010 and Subsequent Model Year Heavy-Duty Engines
Appendix D: Proposed Regulation Order - HD OBD Enforcement Regulation, Title 13, California Code of Regulations, Section 1971.5, Enforcement of Malfunction and Diagnostic System Requirements for 2010 and Subsequent Model Year Heavy-Duty Engines
Appendix E: Data Record Reporting Procedures for Over-the-Air Reprogrammed Vehicles and Engines Using SAE J1979-2
Appendix F: Economic Analysis Support
More Information

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