What is the function of OBD in sedans?

1 Answers
LaCora
07/30/25 6:32am
The function of OBD in sedans is to monitor the working conditions of the engine's electronic control system, vehicle functional modules, and exhaust treatment system during operation. When a fault occurs in any system or the exhaust exceeds the standard, the fault indicator light will trigger an alarm. OBD, also known as On-Board Diagnostics, can simultaneously monitor multiple systems and components in a vehicle, mainly including: 1. Engine; 2. Catalytic converter; 3. Particulate filter; 4. Oxygen sensor; 5. Emission control system; 6. Fuel system. When the vehicle's fault indicator light is on, connecting a computer to the OBD can retrieve the fault codes, helping to diagnose the vehicle's issues and proceed with repairs.
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