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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:
- Regulatory and Technical Resources
Find the information you need about OBD regulatory and technical issues. - Vehicle Service Information
Learn more about the availability of service information to aftermarket technicians. - Training Resources
Interested in learning more about OBD? Access various training materials, including videos, manuals, and a list of course offerings around the country.
Related Links: 
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) (167K PDF, 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.
California Air Resources Board (CARB)
Learn more about CARB's service information requirements.