What does it mean when the engine light is on?
2 Answers
It is normal for the engine light to illuminate and then turn off after starting the car, as this is part of the vehicle's computer self-check and does not require maintenance. However, if the light remains on continuously or flashes, it indicates a fault in the engine system that needs to be inspected and repaired at a service center. When the engine light comes on, first ensure that the engine oil pressure, coolant temperature, fuel system, and ignition system are all functioning properly. Then, turn off the main power supply, wait for a while, and restart the engine to see if the light remains on. If it does, you should take the vehicle to a repair station for a fault diagnosis. The main reasons for the engine light to come on include: 1. Sensor issues; 2. Maintenance problems; 3. Fuel quality issues; 4. Poor combustion of the air-fuel mixture; 5. Intake problems.
When the check engine light comes on, it means your vehicle's computer has detected an issue with the engine, which could be related to sensors, ignition system, or emission control. I've experienced this before - the light suddenly illuminated while I was driving on the highway, accompanied by increased vibration and reduced speed, which was quite nerve-wracking. After inspection, it turned out to be a faulty oxygen sensor that monitors exhaust emissions; when broken, it can trigger false alerts. Other common causes include fuel pump failure, worn spark plugs, or ECU software bugs - even minor issues can trigger the warning light. My advice is to pull over immediately for inspection. If the engine sounds normal and the light stays steady (not flashing), you may carefully drive to a repair shop. However, if the light flashes or there are abnormal noises, don't move the vehicle - calling a tow truck is the safest option. Remember to visit a proper garage to read the diagnostic trouble codes for targeted repairs. Regular maintenance can help prevent such issues.
