What are the reasons for the engine malfunction indicator light turning on?
2 Answers
Reasons for the engine malfunction indicator light turning on: 1. Failure to perform regular maintenance, leading to increased operational burden on the engine; 2. Deterioration of lubricating oil quality during use, resulting in oil degradation; 3. Faulty spark plugs, ignition coils, fuel pump issues, or fuel line blockages in the engine. Steps to reset the engine malfunction indicator light: 1. Turn off the engine, then switch the ignition to the ON position; 2. Open the hood and the fuse box cover, locate the EFI 30A fuse according to the diagram on the fuse box cover, remove it, wait a few seconds, and reinstall it; 3. Turn off the ignition, switch it back to the ON position, then start the car, and the malfunction indicator light should reset.
Recently, the engine warning light on my car came on, which is really frustrating. There are usually many possible causes, such as a faulty oxygen sensor that can't monitor exhaust emissions—if it's broken, the car will consume more fuel. Or there might be an issue with the fuel system, like clogged fuel injectors preventing proper fuel delivery, causing the car to shake. Sometimes, it's a problem with the ignition system, like worn-out spark plugs failing to ignite. In other cases, the emission control system isn't functioning properly, such as a clogged catalytic converter restricting exhaust flow, triggering the warning light. I suggest first checking the oil pressure yourself—if it's low, it might mean the engine oil is insufficient and needs topping up. But don't delay too long; the light indicates the engine is having issues, and driving long distances poses risks. Quickly take it to a repair shop to scan the diagnostic codes. Remember, don't drive recklessly to avoid further damaging the entire engine—it could cost more and be dangerous.
