On-Board Diagnostics, or "OBD," is a computer-based system built into all 1996 and later light-duty vehicles and trucks, as required by the Clean Air Act Amendments of 1990. OBD systems are designed to monitor the performance of some of an engine's major components including those responsible for controlling emissions.
OBD impacts many audiences for different reasons.
- For Repair Technicians:
- OBD is a valuable tool that assists in the service and repair of vehicles by providing a simple, quick, and effective way to pinpoint problems by retrieving vital automobile diagnostics from the OBD systems.
- This site will help you find information about
OBD regulatory and technical issues and the availability of service
information needed to diagnose and repair OBD problems.
- For State Agencies:
- OBD plays an important role where vehicle inspection and maintenance programs are required.
- This site will help you find information on
program implementation guidance and outreach materials to help raise
awareness about OBD in your state or locality.
- For Vehicle Owners:
- OBD serves as an early warning system that alerts you to the potential need for vehicle repair through the "Check Engine" light on the dashboard of your vehicle.
- This site will help you find information on the
benefits of OBD and the important role OBD plays in responsible car care
and learn other ways you can maintain your vehicle and reduce its
emissions.
- For Vehicle and Engine Manufacturers:
- OBD systems are required by EPA to be installed on light-duty vehicles and trucks, as well as heavy-duty engines.
- This 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.
Summary Notes (In case you're in a hurry)...
What is OBD-II?
On-Board Diagnostic systems are in most cars and light trucks on the road today. During the '70s and early 1980's manufacturers started using electronic means to control engine functions and diagnose engine problems.
This was primarily to meet EPA emission standards. Through the years on-board diagnostic systems have become more sophisticated. OBD-II, a new standard introduced in the mid-'90s, provides almost complete engine control and also monitors parts of the chassis, body and accessory devices, as well as the diagnostic control network of the car.
Does my car have OBD-II?
You can tap into your vehicles OBD-II system with a OBD2 plug and software.
Click here to see the dates OBD-II started being included on specific makes and models.
You can tap into your vehicles OBD-II system with a OBD2 plug and software.
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