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On-Board Diagnostics (OBD)

OBD Logo - Check Engine Light Repair Technicians

As an automotive repair technician, you strive to accurately diagnose problems with a vehicle's engine or emissions control components. OBD provides you with a simple, quick, and effective way to do so, allowing you to pinpoint the problem by retrieving vital automobile diagnostics. OBD gives you the tools you need to catch small problems before they become bigger ones down the road. Ultimately, OBD provides you with more accurate and timely information, allowing you to better serve your customer. In addition, EPA requires that repair technicians have access to emissions-related service information, developed by vehicle and engine manufacturers, to utilize the OBD system. Vehicle manufacturers are required to make this information available to the aftermarket via the Internet.

For more information on OBD, service information, and related topics, use the links below:

Related Links: exit EPA

National Automotive Service Task Force
Learn more about what the automotive industry is doing to support aftermarket technicians. This site includes links to Web sites for all of the vehicle manufacturers.

California's Bureau of Automotive Repairs — Vehicles With OBD II Testability Issues (PDF) (7 pp, 167K, About PDF Files)
Learn which automobile makes and models have had documented problems during OBD II checks. This document includes a description of the exact problems encountered and suggested methods for solving them.

International Automotive Technicians Network (iATN)
Established in 1995, iATN is the world's first and large network of automotive repair professionals, with over 70,000 members from over 150 countries. The combined knowledge of thousands of top automotive repair technicians networking together helps the members of iATN provide some of the highest quality automotive repair, diagnosis and service in the world.

California Air Resources Board (CARB)
Learn more about CARB's service information requirements.

This page is maintained by EPA's Office of Transportation and Air Quality (OTAQ).
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