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Try tightening your gas cap, We had the same problem and the gas cap wasn't tight all the way, We tightened the cap and it went off, after awhile. you may have to replace it, but tighten to allot of clicks and make sure its secure. Something to do with the pressure of the gas tank, but that's just one reason, there could be a CO2 sensor out or a fuel temp sensor, but try that and if it doesn't work go to Auto Zone and have them do a engine light check. they do it free of charge. or most auto parts dealers

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Q: What causes the check engine light to come on in a 2004 Kia Sorento?
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