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Causes of check engine light

Answers from the Automotive Experts

Jessica Howe, Automotive Expert & Coach at


Thank you for writing in. There are may reasons why the check engine light may come on. To find out what the vehicle is trying to tell you, have it scanned for diagnostic codes by a technician. Most automotive parts stores can also scan for the codes that turn on your check engine light. These places often scan the vehicle for free. Once you have the code, you can use it to find out what systems are malfunctioning. Good luck!

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