Why is the engine warning light on?

[LeVera]

There are several reasons why the engine warning light may illuminate: 1. Poor combustion condition; 2. Engine knocking: When engine knocking occurs, the warning light will activate. Engine knocking typically manifests in three ways: reduced vehicle power, reduced power accompanied by excessive engine noise, and distinct piston knocking sounds. The warning light may or may not illuminate for the first scenario, but will definitely activate for the latter two conditions; 3. Severe carbon buildup inside engine cylinders can also trigger the warning light. It's crucial for owners to promptly inspect the engine's working condition to prevent more serious malfunctions.