What does it mean when the engine yellow light is on the car dashboard?
1 Answers
When the engine yellow light is on, it indicates that there is a fault with the engine, mainly caused by sensor issues, maintenance problems, or fuel quality issues. Below is a detailed analysis of these problems: Sensor Issues: The sensors mentioned here include the coolant temperature sensor, crankshaft position sensor, air flow sensor, intake air temperature sensor, and oxygen sensor. When these sensors are damaged, have poor contact, or experience signal interruption, the car's ECU cannot accurately obtain engine data, which will trigger the engine fault light. Maintenance Problems: Poor engine maintenance is the most common cause of the engine fault light turning on. Vehicles have specific maintenance cycles, and if the owner does not perform maintenance on schedule, combined with poor driving habits, it will increase the burden on the engine's operation, ultimately triggering the yellow light as a warning. Fuel Quality Issues: The fuel quality here includes both fuel and engine oil. The fuel used in cars generally has specific grades, and engine oil can be either semi-synthetic or fully synthetic. Manufacturers usually recommend which grade of fuel and type of engine oil to use. If the owner does not follow these recommendations, prolonged use can lead to engine wear, causing the fault light to illuminate.
