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2003 Hyundai Santa Fe Question: CHECK ENGINE LIGHT KEEPS COMING ON

 

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CUTEBLONDIE, 2.7L V6, Grafton, MA, June 28, 2010, 07:03
 Rookie

I GOT A CHECK ENGINE LIGHT AND WHEN READ diag SAID I NEEDED A BACK SENSOR SO I REPLACED IT AND THEN IT CAME BACK ON AGAIN,(after 6 miles)...diag SAID TWO FRONT SENSORS AND WE PLACED THEM AND IT IS STILL ON AGAIN CAN NOT PASS INSPECTION

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    Advanced Auto, Inc (20 Answers) , Uxbridge, MA - (508) 709-4877
    advancedauto616 December 02, 2010, 07:16
     Technician

    When you are referring to "diag", are you plugging in a code reader, or have you actually had an experienced technician properly diagnose the issue? And when you refer to "sensors", are you referring to the oxygen sensors? I'm making a few assumptions, based on your description, but it sounds like you have used a code reader and replaced several of the oxygen sensors. The problem with that approach, is that the code reader will only help you identify the "system" on the vehicle that is malfunctioning and causing the check engine light. In order to accurately determine the source of the problem, there are diagnostic testing procedures that need to be performed....every code has it's own set of tests to accurately pinpoint the source of the problem. Before you waste any more money guessing at the parts, it would make sense to bring the vehicle to a reputable shop and have them accurately diagnose the problem.

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