On-Board Diagnostics (OBD)
Vehicle and Engine Manufacturers
Pursuant to the Clean Air Act Amendments of 1990, EPA requires vehicle and engine manufacturers to install OBD systems on light-duty vehicles and trucks, as well as heavy-duty engines. This Web site will help keep you informed of EPA's regulatory efforts, policies, and guidelines regarding OBD, including any issues that might impact your design and manufacturing process.
Use the links below for more information on OBD topics of interest to you:
- Regulatory and Technical Resources
Access regulatory and technical documents concerning OBD in light and heavy duty vehicles, as well as state inspection and maintenance programs.
- California Air Resources Board (CARB)
Learn more about CARB's OBD requirements.