Is the check engine light triggered at 40,000 miles, and if so, how do I turn it off?
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2004 Mercury Grand Marquis Question: The check engine light came on at 40,000 miles.
Answer #1chinasinoy April 17, 2012, 20:44Journeyman
i think something wrong with your engine,
you should get a car diagnostic tool for your car,
maybe this tool can suit for your car,
Answer #2csubak30 April 18, 2012, 00:22Master
Just go to a part store and have them give you a free code read and post the results here.