What does it mean when the engine yellow light stays on?
2 Answers
The reasons why the engine yellow light stays on are: 1. Poor gasoline quality; 2. Faulty oxygen sensor or air flow sensor; 3. Excessive spark plug carbon deposits; 4. Engine knocking; 5. Damaged water temperature sensor; 6. Abnormal fuel pressure; 7. Poor engine combustion state. Solutions for when the engine yellow light stays on include: 1. If the engine shows no obvious abnormal operation, try restarting the engine; 2. If the engine operation is confirmed to be normal, attempt to clear the fault code by disconnecting the power or removing the fuse; 3. For more serious faults, it is necessary to have a 4S shop inspect and repair the car engine fault through the fault code.
Last month, the yellow engine light suddenly came on while I was driving, which gave me quite a scare. I later learned that this is usually the car's check engine light warning, indicating that there's an issue with the engine that needs to be checked. My mechanic told me that common causes include aging exhaust system components like the catalytic converter or fuel system leaks leading to emission failures. In my case, it was a faulty oxygen sensor, and the light went off after it was fixed. He suggested first checking if the fuel cap is loose. If the light stays on, it's best to head to a repair shop immediately to read the trouble codes with a diagnostic computer. Don't delay driving it, as the problem could worsen, leading to reduced engine efficiency, higher fuel consumption, or even a breakdown. Regular maintenance, especially keeping sensors clean, can help avoid such issues. Now, I feel much more at ease when driving.
