What Causes the Car Valve Warning Light to Illuminate?

[KaydenRose]

1. Sensor Issues: The sensors mentioned 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 interruptions, the car's ECU cannot accurately obtain engine data, which will trigger the engine warning light. 2. Maintenance Issues: Poor engine maintenance is the most common cause of the engine warning light coming on. Vehicles have specific maintenance cycles. If the owner does not adhere to the maintenance schedule and has poor driving habits, it will increase the burden on the engine's operation, ultimately prompting the warning light to remind the owner to take care of their car. 3. Fuel Quality Issues: The fuel quality here includes both fuel and engine oil. The fuel used in cars usually has a specific grade, and engine oil can be semi-synthetic or fully synthetic. Manufacturers generally 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, and the warning light coming on is no surprise.