What causes the engine warning light to flash in a Subaru Forester?

[ConnorFitz]

Subaru Forester engine warning light usually indicates the following reasons: 1. Poor combustion condition Poor engine combustion condition is the main reason for the engine warning light to illuminate. 2. Engine knocking Typically there are three situations: First situation: The car lacks power; Second situation: The car lacks power and the engine noise is excessive; Third situation: There is obvious piston knocking sound. In the first situation, some engine warning lights may illuminate while others may not; in the second and third situations, the engine warning light will inevitably illuminate. 3. Internal causes of engine warning light illumination (1) Poor fuel quality (2) Dirty engine cylinder interior with accumulated carbon deposits