Question about 1994 Pontiac Grand Am

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I have 1994 grand am 3100 engine. When you drive at highway speeds and then let off gas the engine light comes on .I had a scan done and no codes where found,and light still comes on.Could it be a speed sensor.If not what could it be.

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  • kbaymer Apr 22, 2009

    I had the codes scanned by a certified mechanic. They also checked the history codes and found nothing.They said the light should not come on any more but it still does.

  • yadayada
    yadayada May 11, 2010

    who ran the codes?

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Try dis. the batter terminals for 10 min. then re-con. them this will reset the com. this works alot of the time

Posted on Jul 12, 2009

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Thiscould be a sign that the cayalytic converter is going bad, have the car scanned by someone who can read the history codes, these are not available to the cheap code readers. you need someone who has a professional type scanner, not the local parts place. hope this helps,let me know. Thanks Ray

Posted on Apr 22, 2009

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