Heavy‑Duty Certification Program

This page last updated June 25, 2019


Background

Description: Semi-trailer end dump truck - a semi tractor with a cargo trailer which uses a hydraulic hoist to lift the front of the trailer in order to dump the contents out the back end.

The Heavy‑Duty Certification Program is responsible for the certification of new incomplete or diesel-fueled medium‑duty vehicles certified using the engine test procedure, heavy‑duty engines, heavy‑duty vehicles, and urban buses (UB). This page provides a collection of emission-related certification and test procedures, regulations, test procedures, Manufacturers Advisory Correspondences (MACs), Mailouts, and related documents applicable to these engines and vehicles, and is primarily for the interest and needs of manufacturers and others that are required to obtain certification from ARB. For public-oriented materials, please visit our On‑Road Heavy‑Duty Vehicle Program page.


Announcements New Item
June 25, 2019

Application Process 

Please address all communication to the Division Chief of the Emissions Compliance, Automotive Regulations and Science Division. The proper mailing address is:
Chief,
Emissions Compliance, Automotive Regulations and Science Division
9480 Telstar Avenue, Suite 4
El Monte, CA 91731
It is acceptable to include an 'ATTN' line in the address if you wish the correspondence be routed to a particular person. Otherwise, it will be routed according to internal ARB rules.

Regulations, Test Procedures, and Policies 

Additional standards for medium‑duty and heavy‑duty engines and vehicles are contained in California Code of Regulations, Title 13 and Title 17 and the following test procedures, as incorporated by reference. Section numbers of selected topics are listed for your convenience when performing a search on the regulations web page.

Emission Control Warranty:
  • 13 CCR 2035-2041, 2044.

Vehicle Emission Labeling:
  • 13 CCR 1965. Emission Control, Smog Index, and Environmental Performance Labels - 1979 and Subsequent Model-Year Motor Vehicles.
  • "California Motor Vehicle Emission Control and Smog Index Label Specifications for 1978 through 2003 Model Year Model Year Motorcycles, Light-, Medium-, and Heavy‑Duty Engines and Vehicles.", adopted March 1, 1978, last amended September 5, 2003. ( PDF ‑ 84K )
  • EPA Document CISD-2006-19, "New Examples of Vehicle Emission Control Information (VECI) Labels and Heavy‑Duty Engine Labels" ( PDF ‑ 153K )


Naming of engine families, evaporative/refueling families, and GHG vehicle families:
  • EPA document EPA420-B-98-002, "Certification Guidance for Engines Regulated Under: 40 CFR Part 86 (On-Highway Heavy‑Duty Engines) and 40 CFR Part 89 (Nonroad CI Engines)", Appendix D ( PDF ‑ 311K )
  • EPA document CISD-07-03, "EPA Standardized Naming Conventions for Model Year 2009 and Later Engine Family and Test Group Names, Evaporative/Refueling Family Names, and Permeation Family Names" ( PDF ‑ 110K )
  • EPA document CD-12-01, "EPA Standardized Naming Conventions for Model Year 2013 and Later Heavy‑Duty Highway Vehicle Family Names" ( PDF ‑ 194K )
  • EPA document CD-15-19, "Consolidation of EPA Standardized Naming Conventions for Engine Family, Test Group, Evaporative/Refueling Family, Permeation Family, Emission Family, and Durability Group" ( PDF ‑ 309K )


Assigned Deterioration Factors:
  • EPA document CCD-00-12, "REISSUE OF ASSIGNED DF'S FOR GASEOUS-FUELED VEHICLES AND ENGINES, formerly CD-95-14" ( PDF ‑ 2097K )
  • EPA document CCD-05-10, "Assigned Deterioration Factors" ( PDF ‑ 512K )
  • EPA document CD-12-07, "Assigned Deterioration Factors" ( PDF ‑ 37K )

Manufacturer Advisory Correspondence 
  • MAC 99-04: Tamper-Resistance Requirements for Diesel Injection Pumps ( PDF ‑ 406K )
  • MAC 07-03: Protocol for the Engine Shutdown System on New California Certified Heavy‑Duty Diesel Engines for 2008 and Subsequent Model Years ( PDF ‑ 101K )

Mailouts 
  • MSO 2007-03: New Requirement to Report Carbon Dioxide Emissions from 2008 and Subsequent Model Year California Certified Vehicles and Engines ( PDF ‑ 85K )

Reports 
ARB Heavy‑Duty Vehicle SCR Technology Field Evaluation

The California Air Resources Board (ARB) staff conducted field investigations into the implementation of 2010 model year (MY) on-road heavy‑duty diesel (HDD) engines equipped with Selective Catalytic Reduction (SCR).  The investigations included: (1) two surveys of diesel exhaust fluid (DEF) availability within the State of California, (2) a survey to determine whether truck operators driving 2010 MY SCR-equipped trucks on California roadways have tampered with SCR components or are not using DEF, (3) an examination of the types and effectiveness of SCR driver inducements employed on 2010 MY HDD vehicles, and (4) an examination of the emission impacts of HDD SCR-equipped vehicles when DEF has been depleted, diluted or the SCR system has been tampered with. All questions regarding this report should be directed to Ms. Annette Hebert, Chief, Mobile Source Operations Division, at (626) 450-6150.

ARB Heavy‑Duty Vehicle SCR Technology Field Evaluation - Second Study

The California Air Resources Board (ARB) staff conducted a second field study in 2011/2012 similar to the first study but with new heavy‑duty diesel (HDD) engines tested. The investigations included (1) a follow-up survey of diesel exhaust fluid (DEF) availability with the State of California, (2) roadside inspections to determine whether truck operators driving Selective Catalyst Reduction (SCR) equipped trucks on California roadways have tampered with SCR components or are not using DEF, (3) a re-evaluation of driver inducements on two SCR-equipped 2010 model year (MY) Cummins engines evaluated in the first study where error in programming and part malfunctions were found, (4) a continued evaluation of 2010+ MY NOx control strategies including an examination of the types and effectiveness of SCR driver inducements employed on SCR-equipped trucks, and (5) an examination of the emission impacts of HDD vehicles. All questions regarding this report should be directed to Mr. Tom Valencia, Manager, In-Use Compliance Section, Mobile Source Operations Division, (626) 575-6741.


Workshops 
Public Workshop to Discuss Current Alternative Fuel Conversion Requirements for New and Used Vehicles and Engines

The California Air Resources Board (ARB) staff hosted a public workshop to clarify ARB's current requirements regarding conversion of vehicles and engines to operate on alternative fuels. The United States Environmental Protection Agency (U.S. EPA) promulgated changes to its rules affecting alternative fuel converters in 2011, and since then ARB has received numerous inquiries regarding its requirements for conversion of vehicles and engines to alternative fuels. Manufacturers have requested guidance on how to certify and show compliance with the ARB regulations. The intent of the workshop was to clarify ARB's regulations and test procedures regarding conversion of vehicles and engines to operate on alternative fuels for new vehicles and engines and for vehicles and engines that have already been purchased (aftermarket). For more information, please read mail-out MSO #2012-02 ( PDF ‑ 47K )

Selective Catalytic Reduction Workshop for New Diesel Engines

The California Air Resources Board (ARB) held a workshop concerning selective catalytic reduction for new diesel engines on July 20, 2010.

Durability Demonstration Workshop for New Diesel Engines

The California Air Resources Board (ARB) held a workshop concerning durability demonstration and deterioration factors for new diesel engines on March 24, 2010.


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