What does automotive OBD refer to?
1 Answers
Automotive OBD refers to the On-Board Diagnostics system, which continuously monitors the engine's operating conditions to check if the vehicle's emissions exceed the standard. If they do, it will immediately issue a warning. When a system fault occurs, the malfunction indicator lamp or check engine warning light will illuminate, and the powertrain control module will store the fault information in memory. The fault code can be read from the PCM through a specific procedure. Based on the fault code, maintenance personnel can quickly and accurately determine the nature and location of the fault. OBD monitors the engine, catalytic converter, particulate filter, oxygen sensor, emission control system, fuel system, EGR, and other systems and components in real-time. Then, it connects to the ECU through various emission-related component information. When an emission fault occurs, the ECU records the fault information and related codes and issues a warning through the malfunction indicator lamp to inform the driver.