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As Amended: December 6, 2012 

Date of Hearing: November 15, 2012

State of California 

AIR RESOURCES BOARD

CALIFORNIA EXHAUST EMISSION STANDARDS AND TEST PROCEDURES 

FOR 2004 AND SUBSEQUENT MODEL 

HEAVY-DUTY DIESEL-ENGINES AND VEHICLES

Adopted: December 12, 2002 

Amended: July 24, 2003 

Amended: September 1, 2006 

Amended: July 26, 2007 

Amended: October 17, 2007 

 Amended: October 14, 2008 

Amended: September 27, 2010 

Amended: October 12, 2011 

Amended: March 22, 2012 

Amended: December 6, 2012 

Note: The proposed amendments to this document are shown in underline to indicate 

additions and strikeout to indicate deletions compared to the test procedures as 

adopted March 22, 2012. [No change] indicates proposed federal provisions that are 

also proposed for incorporation herein without change. Existing intervening text that is 

not amended in this rulemaking is indicated by “ * * * * ”. 

 
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As Amended: December 6, 2012 

Date of Hearing: November 15, 2012

* * * * 

CALIFORNIA EXHAUST EMISSION STANDARDS AND TEST PROCEDURES 

FOR 2004 AND SUBSEQUENT MODEL 

HEAVY-DUTY DIESEL ENGINES AND VEHICLES

* * * * 

PART 86 – CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY 

VEHICLES AND ENGINES

I. GENERAL PROVISIONS FOR CERTIFICATION AND IN-USE VERIFICATION 

OF EMISSIONS. 

* * * * 

Subpart A - General Provisions for Emission Regulations for 1977 and Later 

Model Year New Light-Duty Vehicles, Light-Duty Trucks, and Heavy-Duty Engines, 

and for 1985 and Later Model Year New Gasoline-Fueled, Natural Gas-Fueled, 

Liquefied Petroleum Gas-Fueled and Methanol-Fueled Heavy-Duty Vehicles. 

* * * * 

11. Emission standards for diesel heavy-duty engines and vehicles. [§86.xxx-11] 

* * * * 

A. California provisions. 

* * * * 

5. Standards for Medium-Duty Engines. 

5.1 Requirements Specific to Heavy-Duty Engines Used in 

Medium-Duty Vehicles 8,501 to 10,000 pounds GVW. For the 2004 

through 2019 2021 model years, a manufacturer of heavy-duty engines used 

in medium-duty vehicles 8,501 to 10,000 pounds GVW may choose to comply 

with the following standards as an alternative to the primary emission 

standards and test procedures specified in title 13, CCR, §1961 or §1961.2, 

as applicable. A manufacturer that chooses to comply with these optional 

heavy-duty standards and test procedures shall specify, in the application for 

certification, an in-use compliance test procedure, as provided in title 13, 

CCR, §2139(c). For the 20202 and subsequent model years, a manufacturer 

of heavy-duty engines used in medium-duty vehicles 8,501 to 10,000 pounds 
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As Amended: December 6, 2012 

Date of Hearing: November 15, 2012

GVW must comply with the primary emission standards and test procedures 

specified in title 13, CCR, §1961.2. 

* * * * 

5.3 Exhaust Emission Standards for Medium-Duty Engines. The 

exhaust emissions from new 2004 through 2019 2021 model heavy-duty 

diesel engines used in ultra-low emission and super-ultra-low emission 

medium-duty diesel vehicles 8,501 to 10,000 pounds GVW and 2004 and 

subsequent model heavy-duty diesel engines used in ultra-low emission and 

super-ultra-low emission medium-duty diesel vehicles 10,001 to 14,000 

pounds GVW shall not exceed: 

Exhaust Emission Standards for 2004 through 2006 Model 

Medium-Duty ULEVs and SULEVs

Vehicle 

Emission 

Category 

NOx + NMHC CO PM HCHO 

ULEV1

Option A 

2.5 (with a 0.5 cap on 

NMHC) 

14.4 0.10 0.050 

ULEV1; 

Option B 

2.4 14.4 0.10 0.050 

Exhaust Emission Standards for 2007 through 2019 2021 Model 

Medium-Duty ULEVs and SULEVs 8,501-10,000 lbs. GVW 

and 2007 and Subsequent Model 

Medium-Duty ULEVs and SULEVs 10,001-14,000 lbs. GVW

Vehicle 

Emission 

Category 

NOx NMHC or 

NMHCE CO PM HCHO 

ULEV1 0.20 0.14 15.5 0.01 0.050 

SULEV1 0.10 0.07 7.7 0.005 0.025 

1 Emissions averaging may be used to meet these standards using the requirements for 

participation averaging, banking and trading programs, as set forth in Section I.15 of these test 

procedures. 

5.4 Optional Standards for Complete and Incomplete Heavy-Duty 

Vehicles. Manufacturers may request to group complete and incomplete 

heavy-duty vehicles into the same test group as vehicles certifying to the LEV 

III exhaust emission standards and test procedures specified in title 13, CCR, 

§1961.2, so long as those complete and incomplete heavy-duty diesel 

vehicles meet the most stringent LEV III standards to which any vehicle within 

that test group certifies. 

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As Amended: December 6, 2012 

Date of Hearing: November 15, 2012

II. TEST PROCEDURES 

* * * * 

Subpart H – Engine Fluids, Test Fuels, Analytical Gases and Other Calibration 

Standards

1065.701 General requirements for test fuels. April 30, 2010. 

* * * * 

B. California provisions. 

* * * * 

3. Identification of New Clean Fuels to be Used in Certification Testing. 

Any person may petition the state board to establish by regulation certification 

testing specifications for a new clean fuel for which specifications for the new 

clean fuel are not specifically set forth in paragraph §86.1313-98 as amended 

herein. Prior to adopting such specifications, the state board shall consider the 

relative cost-effectiveness of use of the fuel in reducing emissions compared to 

the use of other fuels. Whenever the state board adopts specifications for a new 

clean fuel for certification testing, it shall also establish by regulation 

specifications for the fuel as it is sold commercially to the public. 

(a) If the proposed new clean fuel may be used to fuel existing motor 

vehicles, the state board shall not establish certification specifications 

for the fuel unless the petitioner has demonstrated that: 

(1) Use of the new clean fuel in such existing motor vehicles would not 

increase emissions of NMHC, NOx, and CO, and the potential risk 

associated with toxic air contaminants, as determined pursuant to 

the procedures set forth in the “California Test Procedures for 

Evaluating Substitute Fuels and New Clean Fuels through 2014,” 

as amended March 22, 2012 or the “California Test Procedures for 

Evaluating Substitute Fuels and New Clean Fuels in 2015 and 

Subsequent Years,” as adopted March 22, 2012 which are 

incorporated by reference in title 13, CCR, §2317, as applicable. In 

the case of fuel-flexible vehicles or dual-fuel vehicles that were not 

certified on the new clean fuel but are capable of being operated on 

it, exhaust and evaporative emissions from the use of the new 

clean fuel shall not increase compared to exhaust and evaporative 

emissions from the use of gasoline that complies with Title 13, 

Division 3, Chapter 5, Article 1, California Code of Regulations.

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