What causes the warning light to flash?

[Anna]

The flashing engine warning light in a car is primarily caused by the oxygen sensor detecting an abnormal air-to-fuel ratio. Here are the reasons why the engine warning light may illuminate: 1. Damaged, poorly connected, or interrupted sensor signals; 2. Poor engine maintenance; 3. Low-quality fuel or engine oil; 4. Incomplete combustion of the air-fuel mixture; 5. Faulty spark plugs or ignition coils; 6. Fuel pump failure or clogged fuel lines; 7. Clogged air conditioning filter. Additional information: An engine is a machine that converts other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. The term 'engine' can refer to either the power generation device or the entire machine including the power unit.