As Amended: December 6, 2012 

Date of Hearing: November 15, 2012 1

State of California 

AIR RESOURCES BOARD 

CALIFORNIA EXHAUST EMISSION STANDARDS AND TEST PROCEDURES FOR 

2004 AND SUBSEQUENT MODEL 

HEAVY-DUTY OTTO-CYCLE ENGINES 

Adopted: December 27, 2000 

Amended: December 12, 2002 

Amended: July 26, 2007 

Amended: October 17, 2007 

Amended: September 27, 2010 

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 “* * * *”. 
As Amended: December 6, 2012 

Date of Hearing: November 15, 2012 2

* * * * 

CALIFORNIA EXHAUST EMISSION STANDARDS AND TEST 

PROCEDURES FOR 2004 AND SUBSEQUENT MODEL 

HEAVY-DUTY OTTO-CYCLE ENGINES

* * * * 

 Part 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 

* * * * 

10. Emission standards for Otto-cycle heavy-duty engines and vehicles. [§86.xxx10]

* * * * 
As Amended: December 6, 2012 

Date of Hearing: November 15, 2012 3

B. California provisions. 

1. Exhaust emissions from new 2004 and later model year Otto-cycle 

medium- and heavy-duty engines, except for Otto-cycle medium- and heavy-duty 

engines subject to the alternative standards in 40 CFR §86.005-10(f), shall not exceed: 

California Emission Standards for 2004 and Subsequent Model 

Heavy-Duty Otto-Cycle EnginesA

(in g/bhp-hr) 

Model Year Emission 

Category 

NMHC + NOx NMHC NOx COH HCHO PM 

Standards for Heavy-Duty Otto-Cycle Engines Used In 2004 through 2019 2021 Model 

Medium-Duty Vehicles 8,501 to 10,000 pounds GVWB and 2004 and Subsequent Model 

Medium-Duty Vehicles 10,001 to 14,000 pounds GVWC

2004 

ULEV 

2.4 or 2.5 with 

0.5 NMHC 

capD

n/a n/a 14.4 0.05 n/a 

SULEV 2.0 n/a n/a 7.2 0.025 n/a 

2005 through 

2007F

 

ULEV 1.0D,F n/a n/a 14.4 0.05 n/a 

SULEV 0.5D,F n/a n/a 7.2 0.025 n/a 

2008 and 

subsequentG

ULEV n/a 0.14F 0.20F 14.4 0.01 0.01 

SULEV n/a 0.07F 0.10F 7.2 0.005 0.005 

Standards for Heavy-Duty Otto-Cycle Engines Used In 

Heavy-Duty Vehicles Over 14,000 pounds GVW 

2004 n/a 

2.4 or 2.5 with 

0.5 NMHC 

capD

n/a n/a 37.1 0.05E n/a 

2005 through 

2007F n/a 1.0C,E n/a n/a 37.1 0.05E n/a 

2008 and 

subsequentG n/a n/a 0.14F

 0.20 E 14.4 0.01 0.01 

* * * * 

 B For the 20202 and subsequent model years, medium-duty vehicles 8,501 to 10,000 

pounds GVW must certify to the LEV III primary emission standards and test procedures for 

complete vehicles specified in section 1961.2, title 13, CCR. 

* * * * 
As Amended: December 6, 2012 

Date of Hearing: November 15, 2012 4

 2. 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 Otto-cycle vehicles meet the most stringent LEV III 

standards to which any vehicle within that test group certifies. 

* * * *