Question about Mercury Grand Marquis

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How can i rest my check engine light on my 92 grand marquis. it comes on when i am in motion. There is nothing seriously wrong with the car, I do notice the gas milages as been poor. What could be ca

How can i reset my check engine light on my 92 grand marquis when it keeps coming on when I am in motion. There is nothing wrong with the car I do notice the gas milages has been poor. What is cold be causing that? And how would i reset the check engine light

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1 minute won't reset any codes for the Grand Marquis. You need to dicsonnect the ground and wait 15 mins for the caps in the comp to fully discharge.

Posted on Dec 15, 2009

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You can reset it by disconnecting the positive battery cable for a minute but if it resets a code when you do this you need to have it put on an engine analizer to see why it is setting codes

Posted on Apr 15, 2009

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1 Answer

1992 grand marquis check engine light comes on when driving. Garage used diagnose machine but came up with no code. Don't know what to do. Sometimes the oil light will appear as well, then car stutters at...


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1994 Grand Mercury Marquise just passed smog, but when I drive on highway or over 45 for a period of time the check engine light comes on and the anti- lock comes on. Then when use the brakes the car jerks...


You got a problem,you know that for sure

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96 grand marquis rough idle, lossof power while driving, check engine light flashes


You work on Check Light issues first,so check
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Nov 12, 2008 | 1992 Mercury Grand Marquis

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