On-Road Light-Duty Emissions Certification Requirements
This page provides a list of emission-related regulations, test procedures, Manufacturers Advisory Correspondences (MACs), and related documents applicable to on-road vehicles, including passenger cars, light-duty trucks, and medium-duty vehicles from 8,501 to 14,000 lbs. GVWR meeting chassis dynamometer based emissions standards, and is primarily for the interest and needs of manufacturers and others that are required to obtain certification from ARB. For more public-oriented materials please visit our Drive Clean web site.
Please sign up to the new Mobile Source Mailouts and MAC list server. By doing this, you will be notified when a new Mobile Source Mailout (e.g. proposing a new rule or amending an existing rule) or MAC (e.g. providing CARB's policy decisions and interpretations of the regulations and test procedures) has been posted to the Mobile Source Mailouts or MAC webpages. These email notices can replace any of the mobile source hard copy mailing lists on which you may already be subscribed.
Primary Subject Matter
The following are California's regulations and test procedures for low-emission vehicles (LEV) and zero-emission vehicles (ZEV) in the passenger car, light-duty truck, and chassis certified medium-duty vehicle classes. These regulations are in Title 13, California Code of Regulations (13 CCR).
|ACC II And LEV Test Procedures
These test procedures are referenced in the ACC II and LEV regulations.
|Zero‑Emission Vehicle Program
|The following are California's zero-emission vehicle (ZEV) and hybrid-electric vehicle (HEV), and Plug-In HEV (PHEV) requirements.
|Evaporative And Refueling Emission Controls For On-Road Motor Vehicles
The following are California's evaporative and refueling regulations and test procedures for passenger cars, light-duty trucks, and medium-duty vehicles.
|Fuel Fill Pipe Requirements
|California Emissions Warranty requirements are in T13 CCR § 2035, et seq. and ZEV & PHEV Warranties are in § 1962.8
|California Emissions Related Labeling and Battery Labeling
|OBD – On‑Board Diagnostics Program
|Alternative Fuel Retrofits
In 2014 CARB amended the certification procedures for 1994 through 2003 model years alternative fuel conversion kits, and adopted new certification procedures for 2004 model year and later alternative fuel conversion kits. These amendments are in Title 13, California Code of Regulations, Sections 2030 and 2031 and incorporated test procedures below.
|Assembly-Line Test Procedures
|New Vehicle Compliance, a.k.a. “Title 13” Testing
|Direct Import (DI) a.k.a. "Gray Market" Vehicles
|Manufacturers Advisory Correspondences (MACs)
The following are selected MACs addressing light-duty vehicle certification. For a fuller list of Mobile Source MACs click the link to the left.
|Mailouts And Correspondences
The following are selected CARB letters and mail-outs addressing light-duty vehicle certification. For a fuller list of Mobile Source mail-outs click the link to the left.
|CARB Certification Administrative Requirements
New vehicle manufacturers are required to register with CARB as a manufacturer to gain access to the document submitting system CARB-eFILE and Electronic Certification (E-Cert) database. See these web pages.
In 2019 CARB conducted a public workshop to discuss the proposed adoption of a schedule of fees for mobile source certification and compliance.
|Search the CCR
For more information regarding these regulations and test procedures, please email the On‑Road Light-Duty Certification Section.