Question about 2004 Mercury Mountaineer

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Check engine light

My 2004 mountaineer premier check engine light goes on for one week and then will go off for approx 3-4 weeks and so on and so forth, was told by my dealer that this is a common problem in the "04 and the factory engineers haven't come up with a solution. Car runs fine otherwise!
What gives here??

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  • O Mclean May 11, 2010

    Does it have a p1000 code?



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  • Mercury Master
  • 77,499 Answers

This is most likely an O2 sensor issue, has the dealer checked the latest TSB's? (technical service bulletins.) I am sure there is one that covers this issue.

Posted on Dec 12, 2008


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