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My check engine light is remaining on. Engine seems to be running smoothly.
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There are hundreds of issues (some serious; some benign) that can trigger the check engine light. Retrieving diagnostic trouble codes (DTCs) is the first step to determining the problem. Keep in mind though, DTCs are not a diagnosis. Codes merely serve as a starting point for further testing and analysis. Here is a list of reputable shops that can help you pinpoint the problem: https://repairpal.com/repair-shops