Onboard Diagnostics technology benefits motorists, technicians and the environment by monitoring a vehicles performance every time it is driven, identifying performance and emission problems immediately and providing technicians with information to help them quickly and accurately diagnose and repair malfunctions.
When a fault was found a code was stored in the vehicles onboard computer and in many instances a “Check Engine” light is lit to alert the driver. Individuals and technicians could connect to the computer and see what codes had been sent and make a diagnosis of the problem.