2001 Mercury Grand Marquis: check engine light

Filed Aug 1, 2017 · Engine · 110,000 miles · CA

The 1996-2001 mercury grand marquis with a 100% plastic intake manifold is known for engine overheating, even with normal use, and a coolant leak from the front of the manifold. This will often trigger the check engine light and low engine coolant warning light. The engine coolant leak is from a factory defect, which causes cracking on the front coolant passage of the intake manifold. In a very short time, this leak will lead to engine overheating issues, especially while the vehicle is idling. This is exactly what happened. I think the car part should have been replaced by ford when they new about the plastic intake manifold.

Filed Sep 17, 2015 · Acceleration, Engine · 136,037 miles · FL

Tl* the contact owns a 2001 mercury grand marquis. The contact stated that while driving at approximately 70 MPH, the vehicle was jerking and the ABS and the check engine warning lights illuminated. The vehicle had a drastic reduction in speed. The vehicle was restarted. The vehicle was taken to the dealer on several occasions where it was repaired but the repair details were unknown. The repairs failed to remedy the vehicle. The contact stated the service engine warning light continued to illuminated and the vehicle jerked violently, reduced speed and attempted to stall. The manufacturer was notified of the failure. The approximate failure mileage was 136,037. Updated 12/03/15

Filed Apr 9, 2011 · Engine · 164,200 miles · OH

While driving my 2001 mercury grand marquis I heard a noise from the engine compartment immediately the engine sounded very loud as if there was an exhaust leak, the engine started running very rough and the check engine light came on, after checking found that the rear spark plug on the right side of the engine had been blown out of its socket and it broke the ignition coil, gas would spray out of the spark plug cavity creating an unsafe condition, I had to buy a repair tool kit and a new coil and spark plug to repair the problem because the dealer (nick mayer in west lake, ohio would not fix it even though I only had the car for 6 days, they said that it was a used car with no warranty so they would not work with me, it ended up costing me over $100.00 to fix a problem that the dealer or manufacturer should had been force to correct.

Filed Jan 29, 2008 · Electrical · PA

2001 mercury grand marquis check engine light illuminated. Consumer states that the vehicle has been worked on, on two separate occasions to repair this problem but the problem still persists. *kb the consumer believed there is an inherent electrical problem with the vehicle.

Filed Mar 2, 2007 · Engine · 18,200 miles · FL

My sister and I'm writing this report on her behalf. Her car is a 2001 mercury grand marquis. Last month, (feb '07) while driving, the car's engine shut down several times. Each time she heard a "beep" and warning lights came on- check engine, traction control and another she can't recall. After a minute or so, the engine would start normally. She took it to the ford dealer, sawgrass ford in sunrise, fl. The problem recurred and she again took the car to the dealer. The last time they found a transmission problem and repaired it. (the transmission had been giving problem, but she took the car to repair the shut-down problem). Yesterday (mar 1, 2007) the engine shut down 4 times ! Each time she heard the "beep" and warning lights illuminated including traction control and check engine lights. She was on her way home and it nearly caused an accident as another car almost ran into her. The car is to go back to sawgrass ford (for the third time) on monday, mar 5 '07. The car will be towed, not driven, as this is a very dangerous condition, especially as power steering and power brakes are lost on shut-down. Interestingly, I had the same problem with my 2000 grand marquis im may and june 2005 . I reported this to you (the federal safety agency) and you wrote me back, assigning ref.# 10141074. My problem was found to have been caused by a single defective spark plug ! The plug was replaced and the car has functioned normally since. The real problem was with the programming of the power control module which was confused and overwhelmed by one bad spark plug. In 2005 I wrote numerous letters to ford and they were completely unresponsive. Engine shut-downs on mercury grand marquis are a serious safety issue and should be corrected. Sincerely,

Filed Sep 21, 2004 · Electrical · 26,000 miles · NJ

While driving 35 MPH, the consumer heard a loud noise coming from the front of the vehicle. It vibrated uncontrollably. Consumer was able to maintain control of the vehicle and drove it to the dealer for inspection. The mechanic determined that the coil needed to be replaced. *ak the dealer replaced the #6 coil because the engine light illuminated. *tc