What Causes the Flashing Check Engine Light?

[VanOlive]

When the check engine light in a car flashes intermittently, it is primarily due to abnormal air-fuel ratio detected by the oxygen sensor. Here are the common reasons for a illuminated check engine light: Damaged, poorly connected, or interrupted sensor signals; Poor engine maintenance; Low-quality fuel and engine oil; Incomplete combustion of air-fuel mixture; Faulty spark plugs or ignition coils; Fuel pump failure or clogged fuel lines; Clogged air conditioning filter. Additional Information: An engine is a machine that converts various forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (such as Stirling engines and steam engines), jet engines, and electric motors. The term "engine" can refer either to the power generation device alone or to the entire machine including the power unit.