1993 mercury grand marq


Old 12-04-02, 06:50 PM
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Question 1993 mercury grand marq

check engine light comes on after driving the car for 10 to 20 minutes. what could be the problem. engine size is v8
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Old 12-04-02, 07:11 PM
Join Date: Dec 2001
Posts: 2,538
well first you need to have codes read if you have a local autozone sometimes they are able to do it for you.
just guessing most likely a o2 sensor or clogged egr passageway is the most common reason for the light to come on for this model but wont no for sure until you have your codes read.

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