Top Reasons Your Check Engine Light Is On: Common Culprits and Solutions

Top Reasons Your Check Engine Light Is On in McFarland, WI | Tom's Auto Center

The check engine light in your car is a warning sign that something is wrong. Unfortunately, many drivers ignore the light until it is too late. Whenever you see the check engine light come on, check your car immediately. These are the top reasons your check engine light is on:

Gas Cap

If you refilled your car and did not properly put back the gas cap, your check engine light will go on immediately. Driving without a properly sealed gas cap is extremely dangerous.

The check engine light comes on because when you properly close the gas cap and tighten it, there is a vacuum created. If the cap is loose, broken, or cracked, the check engine light will come on automatically.

You can close the gas cap if it is loose. If it is broken or cracked, replace it as soon as possible.

Catalytic Converter

The catalytic converter is one of the most essential parts of your engine, and your car cannot run without it. If your catalytic converter is damaged, the check engine light will turn on immediately.

The primary sign of a damaged catalytic convertor is a rotten egg smell. If you smell rotten eggs and the check engine light is on, you should see a professional mechanic as soon as possible and replace the converter.

Spark Plugs

Your car's spark plugs are crucial to its ignition system. If the spark plugs are damaged or are completely not working, the check engine light will be on until you fix the issue.

You should change your spark plugs at least every 100,000 miles. If your car is stalling, please replace the spark plugs.

For check engine light repair, please bring your vehicle to Tom's Auto Center in McFarland, WI. Our team is always looking forward to having you!