Vehicle Questions and Answers
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There are numerous reasons why the check engine light might come on in your 2001 Ford Explorer. To figure out what's going on, it's best to identify the specific diagnostic trouble code that is associated with it. You can either take your Explorer to a nearby AutoZone to have the code read for you, or purchase a scanner (usually around $50) or a bluetooth dongle (less than $15) that can be paired with your phone to read the code. Once you have that information, you will have a better idea of what the engine is indicating is wrong, which will help you troubleshoot. Possible issues could range from a failing oxygen sensor, problems with the mass airflow sensor, issues with the fuel injection system, or even more serious problems like a misfiring engine.
Some of the typical reasons that could trigger the check engine light in a 2001 Ford Explorer are faulty spark plugs, a weak or failing battery, or a gas cap that is loose or missing.