

The check engine light is on and you don't know why. It can signal anything from a loose gas cap to a misfire — a quick diagnostic scan pinpoints the exact cause.
Find a ProviderIf the light is steady and the car drives normally, it's usually okay to drive to a shop. A flashing light means stop soon to avoid serious damage.
A steady light is a non-urgent fault to check soon; a flashing light signals an active misfire that can damage the catalytic converter.
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