California Air Resources Board

The following files contain the latest clean versions (without underline and strikeout) of CARB's test procedures for low-emission vehicles and zero-emission vehicles.

Current Test Procedures

• Criteria Pollutant Exhaust Test Procedure: 2026+ MY (LEV IV)
  “California 2026 and Subsequent Model Year Criteria Pollutant Emission Standards and Test Procedures for Passenger Cars, Light-Duty Trucks, and Medium-Duty Vehicles,” as of November 30, 2022 (adopted August 25, 2022), incorporated by reference in Section 1961.4(c)(1), Title 13, CCR

• Criteria Pollutant Exhaust Test Procedure: 2015 - 2025 MY; Greenhouse Gas Test Procedure: 2017+ MY (LEV III)
  “California 2015 through 2025 Model Year Criteria Pollutant Exhaust Emission Standards and Test Procedures and 2017 and Subsequent Model Year Greenhouse Gas Exhaust Emission Standards and Test Procedures for Passenger Cars, Light Duty Trucks, and Medium Duty Vehicles,” as of November 30, 2022 (last amended August 25, 2022), incorporated by reference in Section 1961.2(d), Title 13, CCR

• Zero-Emission and Plug-in Hybrid Vehicle Test Procedure: 2026+MY (ACC II ZEV and LEV IV)
  California Test Procedures for 2026 and Subsequent Model Year Zero-Emission Vehicles and Plug-in Hybrid Electric Vehicles, in the Passenger Car, Light-Duty Truck and Medium-Duty Vehicle Classes," as of November 30, 2022 (last amended August 25, 2022), incorporated by reference in Section 1962.4(d), Title 13, CCR

• Zero-Emission, Plug-in Hybrid, and Hybrid Vehicle Test Procedure: 2018 - 2025 MY (ACC I ZEV and LEV III)
  "California Exhaust Emission Standards and Test Procedures for 2018 Through 2025 Model Year Zero-Emission Vehicles and Hybrid Electric Vehicles, in the Passenger Car, Light-Duty Truck and Medium-Duty Vehicle Classes," as of November 30, 2022 (last amended August 25, 2022), incorporated by reference in Section 1962.2(h), Title 13, CCR

• Assembly-Line Test Procedure: 2001+ MY
  "California Assembly-Line Test Procedures for 2001 and Subsequent Model-Year Passenger Cars, Light-Duty Trucks and Medium-Duty Vehicles," as of December 1, 1999 (adopted August 5, 1999), incorporated by reference in Section 2062, Title 13, CCR

• Environmental Performance Label Specifications: 2009+ MY
  "California Environmental Performance Label Specifications for 2009 and Subsequent Model Year Passenger Cars, Light-Duty Trucks, and Medium-Duty Passenger Vehicles," as of October 8, 2015 (last amended September 2, 2015), incorporated by reference in Section 1965, Title 13, CCR

• Test Procedures for Evaluating Substitute Fuels and New Clean Fuels: 2015+ MY
  “California Test Procedures for Evaluating Substitute Fuels and New Clean Fuels in 2015 and Subsequent Years”, as of November 30, 2022 (last amended August 25, 2022), incorporated by reference in Section 2317(a)(1), Title 13, CCR

• Criteria Pollutant Exhaust Test Procedure: 2015+ MY; Greenhouse Gas Test Procedure: 2017+ MY
  The "California 2015 and Subsequent Model Criteria Pollutant Exhaust Emission Standards and Test Procedures and 2017 and Subsequent Model Greenhouse Gas Exhaust Emission Standards and Test Procedures for Passenger Cars, Light Duty Trucks, and Medium Duty Vehicles," as of April 1, 2022 (last amended September 9, 2021) incorporated by reference in Section 1961.2(d), Title 13, CCR

• Non-methane Organic Gas (NMOG) Test Procedure: 2017+ MY
  "California Non-Methane Organic Gas Test Procedures for 2017 and Subsequent Model Year Vehicles", as of November 30, 2022 (last amended August 25, 2022), incorporated by reference in Section 1961.2(d), Title 13, CCR

• Guidelines for Certification of Federally-Certified Light-Duty Vehicles: 2003+ MY
  "Guidelines for Certification of 2003 and Subsequent Model-Year Federally-Certified Light-Duty Motor Vehicles for Sale in California," as of October 16, 2002 (adopted July 30, 2002),incorporated by reference in Section 1960.5(c), Title 13, CCR

• California New Vehicle Compliance Test Procedure
  "California New Vehicle Compliance Test Procedures" as of December 1, 1999 (last amended August 5, 1999), incorporated by reference in Section 2101(b), Title 13, CCR

Current Regulations

The most recent versions of the California Code of Regulations (CCR) can be found at Westlaw. For related requirements in various sections of chapter 1 (Motor Vehicle Pollution Control Devices) and chapter 2 (Enforcement of Vehicle Emission Standards and Surveillance Testing), division 3 (Air Resources Board), title 13, CCR, please refer to the following document:

• The California Low-Emission Vehicle Regulations for Passenger Cars, Light-Duty Trucks and Medium-Duty Vehicles, including all or portions of Sections 1900, 1956.8, 1960.1, 1960.5, 1961, 1961.1, 1961.2, 1961.3, 1961.4, 1962, 1962.1, 1962.2, 1962.3, 1962.4, 1962.5, 1962.6, 1962.7, 1962.8, 1965, 1976, 1978, 2037,2038, 2062, 2101, and 2235 title 13, California Code of Regulations, as of November 30, 2022.

Archived Test Procedures

• Criteria Pollutant Test Procedure: 2001 - 2014 MY; Greenhouse Gas Test Procedure: 2009 - 2016 MY
  The "California 2001 through 2014 Model Criteria Pollutant Exhaust Emission Standards and Test Procedures and 2009 through 2016 Model Greenhouse Gas Exhaust Emission Standards and Test Procedures for Passenger Cars, Light-Duty Trucks, and Medium-Duty Vehicles," as of December 31, 2012 (last amended December 6, 2012) incorporated by reference in Section 1961(d), Title 13, CCR

• Exhaust Emission Test Procedure: 1988 - 2000 MY
  "California Exhaust Emission Standards and Test Procedures for 1988 Through 2000 Model Passenger Cars, Light-Duty Trucks and Medium-Duty Vehicles," as of December 1, 1999 (last amended August 5, 1999), incorporated by reference in Section 1960.1(k), Title 13, CCR

• Zero-Emission and Hybrid Vehicle Test Procedure: 2009 - 2017 MY
  "California Exhaust Emission Standards and Test Procedures for 2009 through 2017 Model Zero-Emission Vehicles, and Hybrid Electric Vehicles, in the Passenger Car, Light-Duty Truck and Medium-Duty Vehicle Classes," as of January 1, 2016 (last amended September 3, 2015), incorporated by reference in Section 1962.1(h), Title 13, CCR

• Exhaust Emission Test Procedure: 2005 - 2008 MY Zero-Emission Vehicles, 2001 - 2008 MY Hybrid Electric Vehicles
  "California Exhaust Emission Standards and Test Procedures for 2005 through 2008 Model Zero-Emission Vehicles, and 2001 and through 2008 Model Hybrid Electric Vehicles, in the Passenger Car, Light-Duty Truck and Medium-Duty Vehicle Classes," as of February 13, 2010 (last amended December 2, 2009), incorporated by reference in Section 1962(e), Title 13, CCR

• Assembly-Line Test Procedure: 1998 - 2000 MY
  "California Assembly-Line Test Procedures for 1998 Through 2000 Model Passenger Cars, Light-Duty Trucks and Medium-Duty Vehicles" as of December 1, 1999 (last amended August 5, 1999), incorporated by reference in Section 2062, Title 13, CCR 

• Emission Control and Smog Index Label Specifications: 2004 - 2009 MY
  "California Motor Vehicle Smog Index Label Specifications for 2004 through 2009 Model Passenger Cars and Light-Duty Trucks," as of June 16, 2008 (last amended May 2, 2008), incorporated by reference in Section 1965, Title 13, CCR

• Emission Control and Smog Index Label Specifications: 1978 - 2003 MY
  "California Motor Vehicle Emission Control and Smog Index Label Specifications for 1978 through 2003 Model Year Motorcycles, Light-, Medium- and Heavy-Duty Engines and Vehicles," as of December 1, 1999 (last amended September 5, 2003), incorporated by reference in Section 1965, Title 13, CCR

• Guidelines for Certification of Federally-Certified Light-Duty Vehicles: 1983 - 2002 MY
  "Guidelines for Certification of 1983 Through 2002 Model-Year Federally-Certified Light-Duty Motor Vehicles for Sale in California," as of October 16, 2002 (last amended July 30, 2002), incorporated by reference in Section 1960.5(c), Title 13, CCR

• Non-methane Organic Gas (NMOG) Test Procedure: 1993 - 2016 MY
  "California Non-Methane Organic Gas Test Procedures for 1993 Through 2016 Model Year Vehicles", as of October 8, 2015 (last amended September 2, 2015), incorporated by reference in Section 1961.2(d), Title 13, CCR

For archived test procedures not listed here, please email cleancars@arb.ca.gov to request a copy.

Evaporative Emissions

To obtain the latest clean versions (without underline and strikeout) of the California evaporative and refueling emissions test procedures, visit Evaporative Emissions Controls for Motor Vehicles.

On-Board Diagnostics Regulations

To obtain the latest clean versions (without underline and strikeout) of the California on-board diagnostics regulations, visit OBD II Regulations and Rulemaking.