How to reset the engine fault light?
2 Answers
Engine fault light reset method: Simply pull out the fuse. Solutions for engine fault light illumination: Clean the engine: Once the engine fault light comes on, the owner should promptly clean the carbon deposits in the engine. Improve fuel quality: Domestic fuel currently cannot meet the requirements of high-performance engines, so owners can take steps to improve fuel quality themselves. Use higher-octane gasoline: After cleaning the engine, since most cars that comply with the National IV emission standards have an engine compression ratio of 10.0 or higher, these vehicles are not suitable for long-term use of gasoline below 95 octane. To maintain the engine in good working condition, owners can choose to use 95 or 97 octane gasoline, which usually resolves the engine fault light issue.
When the engine warning light comes on, I find it a bit annoying, but after experiencing it a few times, I know how to handle it. The best way to clear it is to first use an OBD scanner to read the trouble codes—there's a small port in the car, usually under the steering wheel. Plug it in and scan to see what the issue is, like a P0420 indicating an exhaust or catalytic converter problem. Clear the code, and the light will go off. But be careful: if it comes back on quickly, don't just clear it again—that’s just sweeping the problem under the rug. Chances are, you’ll need to fix the root cause, like a faulty oxygen sensor or a loose gas cap. I once cleared the light only for it to come back on, and it turned out to be a small battery leak, costing me more to fix. Regular oil changes and checking spark plugs can help prevent issues. If the light comes on while driving, slow down and stop in a safe place to avoid breaking down. Remember, safety first—make sure you know the basics or seek professional advice before attempting any fixes.