When you are driving, if you notice that your vehicle's engine fault light is yellow, it means that there is something that needs to be addressed. An engine fault light is an indicator light in which the monitoring system detects a fault in the engine or emissions system and sends a warning signal to the driver.
The engine failure light turns yellow and can be caused by a number of reasons. Here are some possible reasons:
1.Oxygen sensor malfunction. The oxygen sensor measures the oxygen content in the emissions and sends a signal to the vehicle's computer. If the oxygen sensor is damaged or fails, the computer will display a warning signal on the engine fault light.
2.Fuel evaporation control system failure. Fuel evaporation control systems are designed to capture and control the emission of harmful chemicals. A faulty fuel evaporation control system may cause the engine failure light to come on.
3.The air flow sensor is faulty. The air flow sensor measures the amount of air entering the engine and sends a signal to a computer to determine the mixing ratio of the fuel. If the air flow sensor fails, it will cause the engine failure light to illuminate.
4.Faulty spark plugs. The spark plug is the part that ignites the gasoline mixture. If the spark plug fails, it may cause the engine failure light to illuminate.
5.Throttle position sensor malfunction. The throttle position sensor measures the position of the valve and sends a signal to the computer to determine the mixing ratio of the fuel. A faulty throttle position sensor may cause the engine fault light to illuminate.
When you see the engine fault light illuminating yellow, it's best to check the vehicle immediately. Some issues may be minor, but if not addressed in a timely manner, they can lead to bigger problems and higher repair costs.
In conclusion, the engine fault light lights up yellow can be caused by a variety of reasons and need to be checked and repaired in a timely manner.