What is the problem when the engine light of a car comes on?

[McCharles]

The reasons why the engine warning light of a car comes on are: 1. Sensor damage or poor contact. 2. Poor engine maintenance. 3. Failure to add engine oil as required. 4. Engine carbon deposits or knocking. 5. Clogged air filter. Additional information: 1. An engine is a machine that can convert other forms of energy into mechanical energy. It was invented in the UK and can be used as a power generation device or refer to the entire machine including the power unit (such as gasoline engines, aircraft engines). 2. Types include internal combustion engines (such as gasoline engines), external combustion engines (such as Stirling engines, steam engines), electric motors, etc.