OBD Updates: Other OBD Information

This page last reviewed October 28, 2015.


The following information/documents can be found on this webpage:

ARB OBD-related Mail-Outs 

Electronic templates for rate-based data reports, CAL ID and CVN data, and monitoring requirements checklists (available under Mail-Out #MSC 06-23 for OBD II and #MSC 09-22 for HD OBD)

ARB OBD presentations for SAE symposiums

Additional information (e.g., draft guidelines)


ARB OBD-related Mail-Outs


ARB Mail-Out #MSC 09-22 (dated July 7, 2009)

Here you will find ARB Mail-Out #MSC 09-22, "Guidelines for Heavy-Duty On-Board Diagnostic (HD OBD) Certification Data," and its associated electronic templates. This mail-out document contains details on information manufacturers are required to submit to ARB when certifying their HD OBD systems, including the required formats for misfire detection and disablement charts, summary tables, rate-based data reports, CAL ID and CVN information, and the gasoline and diesel monitor checklists. Please use the latest versions of the misfire chart, templates, and checklists.

Note: for files marked "last updated October 28, 2015": changes involve updates to the form numbers and the revision dates of the documents (now dated 9/15).

  • Mail-Out #MSC 09-22: ARB document containing specifics on the information and formats required to be submitted by manufacturers. (PDF - 149K).
    • Attachment A: Misfire Disablement and Detection Chart: (PDF - 18K) (last updated February 24, 2011)
  • HD OBD Rate-Based Data Report Template: Template manufacturers are required to use for electronically submitting rate-based data reports (section 1971.1(l)(3)) to ARB. 
    • Diesel Engines: (Excel - 114K) (last updated October 28, 2015)
    • Gasoline Engines: (Excel - 106K) (last updated October 28, 2015)
  • HD OBD CAL ID and CVN Data Template: Template manufacturers are required to use for electronically submitting CAL ID and CVN information (section 1971.1(h)(4)) to ARB. (Excel - 24K(last updated October 28, 2015)
  • HD OBD Gasoline and Diesel Monitoring Requirements Checklists: Checklists manufacturers are required to fill out as part of the HD OBD certification application (section 1971.1(j)).
    • Diesel Engines: (Excel - 36K(last updated October 28, 2015)
    • Gasoline Engines: (Excel - 30K(last updated October 28, 2015)

ARB Mail-Out #MSC 06-23 (dated December 21, 2006)

Here you will find ARB Mail-Out #MSC 06-23, "Guidelines for On-Board Diagnostic II (OBD II) Certification Data," and its associated electronic templates. This mail-out document contains details on information manufacturers are required to submit to ARB when certifying their OBD II systems, including the required formats for misfire detection and disablement charts, summary tables, rate-based data reports, CAL ID and CVN information, and the gasoline and diesel monitor checklists.  Please use the latest versions of the misfire chart, templates, and checklists.

Note: for files marked "last updated October 28, 2015": changes involve updates to the form numbers and the revision dates of the documents (now dated 9/15).

  • Mail-Out #MSC 06-23: ARB document containing specifics on the information and formats required to be submitted by manufacturers. (PDF - 115K)
    • Attachment A: Misfire Disablement and Detection Chart: (PDF - 18K) (last updated February 24, 2011)
  • OBD II Rate-Based Data Report Template: Template manufacturers are required to use for electronically submitting rate-based data reports (section 1968.2(j)(3)) to ARB.
    • Gasoline Vehicles: (Excel - 75K(last updated October 1, 2014)
    • Diesel Vehicles: (Excel - 72K(last updated May 19, 2014)
  • OBD II CAL ID and CVN Data Template: Template manufacturers are required to use for electronically submitting CAL ID and CVN information (section 1968.2(g)(4)) to ARB for 2008 and subsequent model year vehicles. (Excel - 22K(last updated October 28, 2015)
  • OBD II Gasoline and Diesel Monitoring Requirements Checklists: Checklists manufacturers are required to fill out as part of the OBD II certification application (section 1968.2(i)).
    • Gasoline Vehicles: (Excel - 31K(last updated October 28, 2015)
    • Diesel Vehicles: (Excel - 36K(last updated October 28, 2015)

ARB Mail-Out #98-01 (dated January 22, 1998)

Here you will find an electronic version of ARB Mail-Out #98-01, "On-Board Diagnostics II Compliance Guidelines," first made available on January 22, 1998. This mail-out document, published after the guidance made available in ARB Mail-Out #95-20 (found below), was developed to provide more guidelines to manufacturers and clarify certain aspects of the OBD II requirements, including clarifications to the MIL illumination requirements for misfire detection.   Please note that since the initial publication of this document in 1998, some of the information in the document have been superceded with new regulatory language.

ARB Mail-Out #96-05 (dated February 16, 1996)

Here you will find an electronic version of ARB Mail-Out #96-05, "Guidelines for Reporting Full Range Misfire Detection Data for On-Board Diagnostics II (OBD II) Approval," first made available on February 16, 1996. This mail-out document was developed during the early years of OBD II implementation and served as a guidance to manufacturers for reporting the probability of misfire detection data.  Please note that since the initial publication of this document in 1996, information about the required format for the misfire probability of detection chart have been superceded with ARB Mail-Out #MSC 06-23 (found above).

ARB Mail-Out #95-20 (dated May 22, 1995)

Here you will find an electronic version of ARB Mail-Out #95-20, "Guidelines for Compliance with On-Board Diagnostics II (OBD II) Requirements," first made available on May 22, 1995. This mail-out document was developed during the early years of OBD II implementation and served as a guidance to manufacturers to clarify certain aspects of the OBD II requirements and to set forth the minimum acceptable performance requirements for certain OBD II monitors.  The document also contained details on the required format for the summary tables manufacturers are required to submit to ARB when certifying their OBD II systems.  Please note that since the initial publication of this document in 1995, most of the information in the document, including the required format for the summary table, has been superceded with new regulatory language and other documents, such as ARB Mail-Out #MSC 06-23 (found above).


ARB OBD Presentations for SAE Symposiums

ARB Presentations from September 15-17, 2015 SAE OBD Symposium (Indianapolis, Indiana, USA) (posted October 28, 2015)

Here you will find ARB's staff presentations from the SAE OBD Symposium that took place in Indianapolis, Indiana, USA on September 15-17, 2015.  These presentations include updates on the proposed OBD II regulation amendments that ARB presented at the September 24-25, 2015 Board Hearing as well as updates concerning the HD OBD program.

ARB Presentations from the March 2-4, 2015 SAE OBD Symposium (Stuttgart, Germany)

Here you will find ARB's staff presentations from the SAE OBD Symposium that took place in Stuttgart, Germany on March 2-4, 2015.  These presentations include updates on the proposed OBD II regulation amendments that ARB planned to adopt at the 2015 Board Hearing as well as updates concerning the HD OBD program.  Note: the proposed OBD II regulation amendments presented here may not reflect the final proposed amendments ARB presented at the September 24-25, 2015 Board Hearing.  Please refer to the OBD II 2015 rulemaking page here for the final proposal.

ARB Presentations from the November 2012 SAE OBD Symposium (Stuttgart, Germany) and September 2013 SAE OBD Symposium (Indianapolis, Indiana, USA)

Here you will find ARB's staff presentations from the following SAE OBD Symposiums listed below.  These presentations include proposed LEV III-based OBD malfunction thresholds that ARB planned to adopt at a future Board Hearing.  Note: the proposed OBD II regulation amendments presented here may not reflect the final proposed amendments ARB presented at the September 24-25, 2015 Board Hearing.  Please refer to the OBD II 2015 rulemaking page here for the final proposal.

  • Stuttgart, Germany (November 13-15, 2012): ARB presentation providing an update on the light-duty OBD II requirements. (PDF - 1710K)
  • Indianapolis, Indiana, USA (September 25-27, 2013): ARB presentation providing an update on the light-duty OBD II requirements. (PDF - 415K)

ARB Presentations from the September 2005 SAE OBD Symposium (Pasadena, California, USA)

Here you will find the ARB staff presentations from the SAE OBD Symposium that took place in Pasadena, CA during September 2005.

  • Update on Light-Duty OBD II: ARB presentation given on September 13, 2005 of issues/changes regarding the OBD II regulation in anticipation of the biennial review scheduled to take place in early 2006. (Powerpoint - 2777K) or (PDF - 492K)
  • CARB Heavy-Duty OBD Update: ARB presentation given on September 15, 2005 summarizing the requirements of the recently adopted heavy-duty OBD regulation. (Powerpoint - 461K) or (PDF - 476K)



Additional Information

Draft Guidelines for Alternate Fuel Vehicle OBD II Certification (from August 14, 2012 alternate fuel conversion workshop)

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)






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