Question about 2000 Mercury Grand Marquis

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My check engine light keeps coming on and i have taken it to the shop three times already and they can't seem to fix my light that keeps coming on is there a way to turn it off it there is nothing wrong with the car

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  • nevaehnasir Sep 06, 2009

    can i fix this problem myself

  • nevaehnasir Sep 06, 2009

    can i fix this myself

  • nevaehnasir Sep 06, 2009

    thanks please answer my post can i fix this myself

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  • Mercury Master
  • 14,036 Answers

COULD BE THE PCM HAVING GROUNDING PROBLEMS.DUE TO A LOOSE GROUND WIRE.

Posted on Sep 06, 2009

  • Jonah Oneal Sep 06, 2009

    YOU NEED A ELECTRICAL DIAGRAM TO YOUR PCM GROUND WIRE LOCATION .YOU CAN FIX IT.BUT ELECTRICAL TROUBLE SHOOTING NOT A EASY JOB.

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