2004 Mercury Grand Marquis Q&A
2004 Mercury Grand Marquis Question: The check engine light came on at 40,000 miles.
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, http://www.chinasinoy.com/wholesale/multi-dig-access-j2534-pass-thru-obd2-device.html - chinasinoy
Just go to a part store and have them give you a free code read and post the results here. - csubak30
Check engine light is amber and stays on.
Happens every day.Stopped at traffic light,seems thst it wants to stall,but doesn't.Driving about 40 45 mph it sort of jerks and goes away.I har it tested diagnostic circut Check engine light.Engin...