What does OBD mean in cars?
2 Answers
OBD in cars refers to the On-Board Diagnostics system, whose function is to monitor the engine operating status and the working condition of the exhaust treatment system in real time. OBD real-time monitoring includes systems and components such as GR, engine, particulate filter, catalytic converter, oxygen sensor, emission control system, fuel system, etc. The working principle of OBD is: when an emission fault occurs, the ECU records the fault information and related codes, notifies the owner through the malfunction indicator lamp or check engine warning light, and maintenance personnel can quickly locate the fault by reading the fault codes with the vehicle's original specialized equipment, facilitating vehicle repair.
OBD stands for On-Board Diagnostics, which means the vehicle's diagnostic system in Chinese. Simply put, it's like an internal doctor for your car, constantly monitoring the engine, emissions, and other critical components. For example, if the engine light on your dashboard comes on while driving, it's likely the OBD signaling an issue. I've driven many cars, especially older models that are prone to such problems. You can buy an OBD scanner yourself and plug it into the standard port under the steering wheel to read fault codes, like P0420 indicating low catalytic converter efficiency, helping you avoid being tricked into unnecessary major repairs. OBD-II is the standard version for modern cars, unifying diagnostic methods to help detect issues before they worsen. Understanding it can save car owners both time and money on maintenance.
