Why is the engine malfunction indicator light on?
2 Answers
The reasons for the engine malfunction indicator light being on: 1. Sensor damage, poor contact, or signal interruption; 2. Poor engine maintenance causing engine malfunction; 3. Failure to add fuel or engine oil as required, leading to severe engine wear; 4. Issues with the engine's spark plugs, ignition coils, fuel pump, or fuel system can cause poor combustion of the engine's air-fuel mixture; 5. The car's air filter is dirty and not cleaned regularly. The engine malfunction indicator light is a yellow light resembling an engine outline. If this warning light comes on or the pressure gauge indicates too high, the first step is to turn off the engine, pull out the engine oil dipstick, and check if the oil level is between the minimum and maximum marks. If the oil level is normal, a technician should be consulted to determine the cause of the light being on.
Last week I drove my car to the repair shop with the warning light on. The experienced mechanic said there could be many reasons for the engine warning light. It might be a fuel system issue, like clogged fuel injectors causing incomplete combustion; or an ignition system failure, such as worn spark plugs or faulty ignition coils. There could also be an oxygen sensor error - this component monitors exhaust conditions, and if broken, it affects fuel consumption. Severe carbon buildup can also trigger the computer's warning. The most troublesome issues involve short circuits in sensor circuits. I once encountered this problem due to poor fuel quality, and it resolved after switching gas stations. It's advisable not to delay and get it checked promptly to prevent major repairs.
