What is automotive OBD?

1 Answers
Sanders
07/30/25 6:43am
Automotive OBD is the On-Board Diagnostics system, which continuously monitors the engine's operating conditions to check if the vehicle's emissions exceed standards and will issue an immediate warning if they do. When a system malfunction occurs, the malfunction indicator lamp or check engine warning light will illuminate, while the powertrain control module stores the fault information in memory. Through specific procedures, the fault codes can be read from the PCM. Based on the fault code prompts, maintenance personnel can accurately determine the nature and location of the fault. The OBD interface in vehicles is generally located in the interior trim panel below the steering wheel, near the driver's knee area.
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