What does it mean when the engine icon on the dashboard lights up?

[MadelineRose]

The reasons for the engine icon lighting up on the dashboard include sensor issues, maintenance problems, and fuel quality issues. Sensor Issues: The sensors referred to here include coolant temperature, crankshaft position, air flow, intake air temperature, oxygen sensors, etc. When these sensors are damaged, have poor contact, or experience signal interruption, the vehicle'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 driver fails to perform maintenance on schedule, combined with poor driving habits, it will increase the operational burden on the engine, ultimately triggering the fault light as a warning. Fuel Quality Issues: The fuel quality mentioned here includes both fuel and engine oil. The fuel used in cars typically has a specific grade, and engine oil can be either semi-synthetic or fully synthetic. Manufacturers generally recommend which grade of fuel and type of engine oil to use. If the driver does not follow these recommendations, prolonged use of unsuitable fuel or oil can lead to engine wear.