California Air Resources Board

Latest OAL-Approved OBD II Regulations

For the latest official versions of the OBD II and associated enforcement regulations (sections 1968.2 and 1968.5, title 13, California Code of Regulations (CCR)), see the Barclays Official California Code of Regulations.

2022 Advanced Clean Cars II Regulations and Associated Amendments (Board Hearings: June 9, 2022 and August 25, 2022)

CARB's Advanced Clear Cars II regulations were approved by OAL on November 30, 2022 and effective the same day.  The rulemaking package includes proposed amendments to the OBD II regulation to address the new Low Emission Vehicle IV emission standards. 

Please visit the official CARB regulatory website for the regulatory documents for this rulemaking.

2021 OBD II and Heavy-Duty OBD (HD OBD) Regulatory Documents (Board Hearing: July 22, 2021)

Final Rulemaking Package (approved by OAL on November 22, 2022, effective the same day)

• Final Statement of Reasons: Summary of the adopted changes and agency responses to each objection and recommendation made by the public during the 45-Day and 15-Day comment periods.
• Addendum to the Final Statement of Reasons: Summary of updates to the Final Statement of Reasons and the final regulation orders.
• Final Regulation Orders: These documents include the strikeout/underline format to identify changes from the current regulations. The final regulation orders only include excerpts of the regulations where the changes were made.
  • Final Regulation Order: Section 1968.2 of Title 13, CCR
  • Final Regulation Order: Section 1968.5 of Title 13, CCR
  • Final Regulation Order: Section 1971.1 of Title 13, CCR
  • Final Regulation Order: Section 1971.5 of Title 13, CCR
• Data Record Reporting Procedures for Over-the-Air Reprogrammed Vehicles and Engines Using SAE J1979-2: This is the latest clean version (December 15, 2021). 
• Executive Order: Used when the Board approved the regulations with the 15-Day changes.
• Updated Informative Digest: Summary of the regulations and the rulemaking process.
• Request for Early Effective Date

Second 15-Day Notice: Posted April 22, 2022 (Deadline to Comment: May 9, 2022)

• Second Notice of Public Availability of Modified Text: The Second 15-Day Notice summarizing the changes to the regulations. The notice includes a summary of the Board's action, a list of the second set of additional changes made to the original proposed amendments to the regulation, availability information of the attachment, and relevant dates.
• Attachment A: Second Modified Text of Sections 1968.2 and 1971.1 of Title 13, CCR: This document uses the bold italic double strikeout/underline format to identify the second set of additional changes to the original proposed amendments to the OBD II and HD OBD regulations made available to the public prior to the Board Hearing.

First 15-Day Notice: Posted February 15, 2022 (Deadline to Comment: March 2, 2022)

• Notice of Public Availability of Modified Text: The 15-Day Notice summarizing the changes to the regulations. The notice includes a summary of the Board's action, a list of the additional changes made to the original proposed amendments to the regulation, availability information of the attachments, and relevant dates.
• Attachment A: Modified Text of Sections 1968.2 and 1968.5 of Title 13, CCR: This document uses the double strikeout/underline format to identify additional changes to the original proposed amendments to the OBD II regulations made available to the public prior to the Board Hearing.
• Attachment B: Modified Text of Sections 1971.1 and 1971.5 of Title 13, CCR: This document uses the double strikeout/underline format to identify additional changes to the original proposed amendments to the HD OBD regulations made available to the public prior to the Board Hearing.
• Attachment C: Data Record Reporting Procedures for Over-the-Air Reprogrammed Vehicles and Engines Using SAE J1979-2: This document updates Appendix E of the Initial Statement of Reasons.
• Attachment D: Addendum to the Initial Statement of Reasons: This document updates information originally provided in the Initial Statement of Reasons.

Board Hearing Documents: Posted June 1, 2021 (Board Hearing: July 22, 2021)

• Board Hearing Presentation: CARB board hearing presentation of the proposed changes to the regulations.
• Public Hearing Notice: Invitation to public and industry to discuss proposed changes to the regulations. This notice includes the date, time, location, and a summary of the issues to be covered during the hearing.
• Staff Report: Initial Statement of Reasons (ISOR): Descriptions of the proposed amendments to the regulations.
• Appendix A: Proposed Regulation Order: Section 1968.2 of Title 13, CCR
• Appendix B: Proposed Regulation Order: Section 1968.5 of Title 13, CCR
• Appendix C: Proposed Regulation Order: Section 1971.1 of Title 13, CCR
• Appendix D: Proposed Regulation Order: Section 1971.5 of Title 13, CCR
• Appendix E: Data Record Reporting Procedures for Over-the-Air Reprogrammed Vehicles and Engines Using SAE J1979-2
• Appendix F: Economic Analysis Support

OBD Workshop: February 27, 2020

• Workshop Notice: Invitation (Mail-Out #ECC 2020-01) to the public and industry to discuss the proposed amendments to the OBD II and HD OBD regulations. This notice indicates the date (February 27), time, location, and a quick summary of the issues to be covered during the workshop.
• Workshop Presentation: CARB workshop presentation of the proposed amendments. 

The regulatory documents for this 2021 OBD rulemaking update can also be found on the official CARB regulatory website.

2018 Heavy-Duty OBD (HD OBD) and OBD II Regulatory Documents (Board Hearing Date: November 15-16, 2018)

Amendments to the HD OBD and OBD II regulations (sections 1971.1, 1971.5, and 1968.2 of title 13, CCR) for adoption. You can find the regulatory documents pertaining to the Board Hearing on the Heavy-Duty OBD Regulations and Rulemaking website or the official CARB regulatory website.

2015 OBD II Regulatory Documents (Board Hearing: September 24-25, 2015)

Office of Administrative Law (OAL)-Approved Final Regulation Orders for the OBD II and Associated Regulations: approved on July 25, 2016

These are the final regulation orders for the OBD II regulations and various other associated regulations, approved by OAL on July 25, 2016.  These versions of the regulations include the "track changes" format to identify changes from the original regulation (additions are indicated by underline and deletions are indicated by strikeout).  

• Section 1968.2 of Title 13, CCR
• Section 1968.5 of Title 13, CCR
• Sections 1900, 1956.8, 1971.1, 1971.5, and 2485 of Title 13, CCR, and Sections 95302 and 95662 of Title 17, CCR

Final Statement of Reasons Package

Documents that are part of the final rulemaking package for the OBD II regulatory update that were filed with OAL on June 10, 2016, and approved by OAL on July 25, 2016.

• Final Statement of Reasons: Summary of the adopted changes to the regulations and each objection and recommendation made by the public during the 45-Day and 15-Day comment periods.
• Addendum to the Final Statement of Reasons
• Updated Informative Digest: Summary of the amendments to the regulations and the rulemaking process.
• Early Effective Date: Request and explanation of good cause for an early date for the regulations to become effective.
• Notice of Exemption
• Executive Order: Used when the Board approves the regulations with the 15-Day changes.

OBD II 15-Day Notice: March 21, 2016

• Notice of Public Availability of Modified Text: The 15-Day Notice summarizing the changes to the regulations. The notice includes a summary of the Board's action, a list of the additional changes made to the original proposed amendments to the regulation, availability information of the attachments, and relevant dates.
• Attachment A: Modified Text of Sections 1968.2 and 1968.5 of Title 13, CCR: This document includes the double strikeout/underline format to identify additional changes to the original proposed amendments to the regulations made available to the public prior to the Board Hearing.
• Attachment B: Modified Text of Sections 1900, 1956.8, 1971.1, 1971.5, and 2485 of Title 13, CCR, and Sections 95302 and 95662 of Title 17, CCR: This document includes the single strikeout/underline format to identify changes from the current regulations.

Board Hearing Documents: September 24-25, 2015 

• Board Hearing Presentation: CARB board hearing presentation of the proposed changes to the regulations.
• Public Hearing Notice: Invitation to public and industry to discuss proposed changes to the regulations. This notice includes the date, time, location, and a summary of the issues to be covered during the hearing.
  • Notice of Public Meeting Location Change: This notice describes the revised location of the public hearing.
• Staff Report: Initial Statement of Reasons (ISOR): Descriptions of the proposed amendments to the regulations.
• Proposed Regulation Order: Section 1968.2: The OBD II regulation (section 1968.2 of title 13, CCR) incorporating the proposed amendments. This document includes the strikeout/underline format to identify changes from the current regulation.
• Proposed Regulation Order: Section 1968.5: The OBD II enforcement regulation (section 1968.5 of title 13, CCR) incorporating the proposed amendments. This document includes the strikeout/underline format to identify changes from the current regulation.
• Proposed Regulation Order: Section 1900: Section 1900 of title 13, CCR incorporating the proposed amendments. This document includes the strikeout/underline format to identify changes from the current regulation.

OBD II Workshop: October 30, 2014 

• Workshop Notice: Invitation (Mail-Out #ECARS 14-07) to the public and industry to discuss the proposed amendments to the OBD II regulation. This notice indicates the date (October 30), time, location, and a quick summary of the issues to be covered during the workshop.
• Workshop Presentation: CARB workshop presentation of the proposed amendments. (revised November 3, 2014)

The regulatory documents for this 2015 OBD II rulemaking update can also be found on the official CARB regulatory website.