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1994 Mercury Marquis check engine light

Tiny
PMO22
  • MEMBER
  • 1994 MERCURY MARQUIS
  • V8
  • 2WD
  • AUTOMATIC
  • 83,000 MILES
I have a 1994 grand marquis and my check engine light keeps coming on. The problem is when I turn the car off and turn it back on the check engine light does not come on so the hand held ford code reader that I bought will not read any code. Is there anyway other way to figure out the problem besides taking it into the repair shop.
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Tuesday, August 18th, 2009 AT 1:12 PM

1 Reply

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi pmo22,

Thank you for the donation.

One of the way to test the code is to drive until the MIL shows and without turning the engine OFF, connect the scanner to check.

Alternatively you can use an analog VOM or the MIL to retrieve the codes.


https://www.2carpros.com/forum/automotive_pictures/192750_RetrievingCodes94Marquis_1.jpg



https://www.2carpros.com/forum/automotive_pictures/192750_RetrievingCodes94Marquis01_1.jpg



https://www.2carpros.com/forum/automotive_pictures/192750_RetrievingCodes94MarquisFig02_1.jpg

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Tuesday, August 18th, 2009 AT 1:54 PM

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