Vehicle Questions and Answers
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There's no way to manually reset the check engine light on a 2008 Subaru Impreza. The light indicates a problem with the car, but it can be triggered by various issues. Instead of spending your time searching for the root cause unless it's an obvious problem, it's better to have a mechanic use an OBD tool to scan it. This will help identify the trouble code and pinpoint the issue for you. Once you know the problem, you can proceed to fix it, which will deactivate the light. However, it's wise to first check the gas cap and fuel door as a missing cap or open door can trigger the light unnecessarily. It's a simple check that you should do before consulting a mechanic.
The "check engine light" on your 2008 Subaru Impreza could come on for a minor issue like a loose gas cap, but it could also point to a bigger problem with your car related to emissions, O2 sensors, blown head gaskets, or damaged fuel lines.
From what I've seen, if the check engine, ABS, and Traction Control lights come on solid and the cruise control light starts flashing, it's likely due to a faulty gas cap. I believe the original cap wears out over time and doesn't seal properly anymore. If the car still runs fine, try removing and reattaching the cap, then take a brief drive. The lights may not turn off right away, so it might take a couple of drives for them to go away on their own.