What does it mean when the car's OBD light is on?
1 Answers
When the car's OBD light is on, it indicates a fault in the engine exhaust system. Its function is to monitor the engine's operating status and the working condition of the exhaust treatment system in real time. The reasons for the OBD light being on include: 1. Sensor issues: Damage, poor contact, or signal interruption in the crankshaft position sensor, air flow sensor, intake temperature sensor, or oxygen sensor can prevent the ECU from accurately obtaining engine data; 2. Maintenance issues: Failure to perform regular maintenance and poor driving habits can increase the engine's operational burden; 3. Fuel quality issues: Not using gasoline that meets the required standards can cause engine wear; 4. Poor combustion of the air-fuel mixture: This can lead to engine carbon buildup or knocking.