What does OBD in a car mean?
2 Answers
OBD in a car refers to the On-Board Diagnostics system, and its functions are: 1. To locate and describe faults in specific parts or components for easier maintenance; 2. To alert about faults that cause excessive emissions, indicating increased environmental impact from pollutant emissions. OBD includes: 1. EGR; 2. Engine; 3. Particulate filter; 4. Catalytic converter; 5. Oxygen sensor; 6. Emission control system; 7. Fuel system. The working principle of OBD is: When an emission fault occurs, the ECU records the fault information and related codes, and notifies the driver through the malfunction indicator light or check engine light.
OBD is an automotive term that stands for On-Board Diagnostics, which I think of as the car's health monitoring center. As someone who frequently tinkers with cars, I've noticed that small port usually located under the steering wheel - connecting a diagnostic tool allows data reading. Since its introduction in the 1990s, OBD has become standard, with OBD-II now being the prevalent version capable of detecting engine faults and emission issues. When the check engine light comes on, I plug in a scanner to read trouble codes, identifying whether it's a bad spark plug or clogged fuel line, avoiding blind repairs. It's also used in annual inspections to ensure emission compliance and prevent pollution. Nowadays, adapters can connect to smartphone apps for real-time monitoring of fuel consumption and abnormal vibrations, with expanded features making driving more reassuring and economical.
