Please select the following EPA resources for various shareholders concerning I/M Programs:

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.

State Agencies OBD plays an important role where vehicle inspection and maintenance programs are required.

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.

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.