What causes the engine malfunction light to illuminate and power loss?

1 Answers
KingstonFitz
07/30/25 5:50am
Reasons for the engine malfunction light illuminating and power loss are as follows: 1. Poor gasoline quality can lead to incomplete combustion of the air-fuel mixture in the cylinders, causing the light to illuminate, and it also easily leads to carbon buildup. 2. Carbon deposits in the intake tract and on the piston tops can result in poor atomization, leading to incomplete combustion and the light illuminating. 3. During cold starts, especially when the temperature drops sharply, the engine control unit's temperature correction may cause the light to illuminate during startup, but it will stabilize once the temperature drops to a certain level and remains steady. 4. Excessive engine mileage can weaken the spark plugs' performance characteristics, leading to the light illuminating.
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