What does the engine symbol appearing on a car mean?

[GiannaMarie]

The engine symbol appearing on a car is the engine fault light. The reasons for the engine fault light to illuminate are as follows: Exhaust emissions not meeting standards: Poor fuel quality, failure of the three-way catalytic converter, excessive carbon buildup in the intake pipe, clogged fuel injectors, failure of the oxygen sensor, occasional engine misfires, etc., can all cause the engine fault light to illuminate. Among these, poor fuel quality is the most common cause. Poor engine performance: The fault light may illuminate due to poor performance of the engine system. Issues such as throttle pedal sensor failure, throttle position sensor failure, air flow meter failure, crankshaft position sensor failure, or poor line contact can all cause the engine fault light to illuminate.