Automatic Transmission Control Module Problems of Mercury Grand Marquis

The contact owns a 2005 Mercury Grand Marquis. While driving 60 mph, the tracking control light and the abs light illuminated and the vehicle began shaking. The owners manual indicated that the control tracking button would deactivate it; however, the light remained illuminated. The dealer stated that he could diagnose the failure. The contact is aware of the safety risk. The failure mileage was 39450 and the current mileage was 39500. Updated 10/5/09 updated 10/07/09.

See all problems of the 2005 Mercury Grand Marquis 🔎.

2003 Mercury Grand Marquis customer has had the head and interior lights repaired three times and wants to be reimbursed for repairs customer has extended service plan * the problem was diagnosed as the power control module. The consumer stated the problem was mis-diagnosed three times as the problem being the lighting control module.

See all problems of the 2003 Mercury Grand Marquis 🔎.

Stopped at red light. Engine stopped. Could not restart. Was towed to Lincoln/Mercury dealer. Diagnosis indicated failure of powertrain command module. According to service manager this failure could take place at any time or place and at any speed. Subsequent to this the heater motor blower control unit failed.

See all problems of the 2004 Mercury Grand Marquis 🔎.

While driving mil code p0420 set. Ford TSB 03-24-5 indicates pcm reprogramming rather than replacement of catalytic converters required. Despite being within emissions warranty coverage period dealer charged $119 for this work, claiming emissions warranty did not cover this work. Defective programming of pcm to cause the check engine light to come on, requiring a visit to dealer. Can't pass emissions test with light on, should be against the law. In any case the reprogramming of the pcm should have resulted in no charge. This failure resulted in a mandated, due to state emissions testing, visit to dealer and a charge for service to fix a manufacturing defect. The pcm was reprogrammed, according to dealer, and currently light is off. It is very easy to program the pcm to send erroneous codes at any time, especially when out of warranty, allowing the car dealers to create a cash flow they might not otherwise have. This should be illegal!.

See all problems of the 1997 Mercury Grand Marquis 🔎.

When vehicle is driven on wet pavement rear wheels have no traction. Please give any further details.

See all problems of the 2001 Mercury Grand Marquis 🔎.

The precision trac system fails and the cars loses all power to proceed, in any weather, and an 18 wheeler is coming from behind as you try to merge into traffic and you can't get out of the way. The dealer repaired the transmission the 1st time this happened and now that the exact same thing is happening, they say they can't find the problem. It is very dangurous to drive and I have no other car and can't afford a new one. Please help.

See all problems of the 1999 Mercury Grand Marquis 🔎.

Consumer states there is a problem with the rear traction control, every time the pavement is wet he experiences problems and has almost been in 2 accidents because of this problem.

Consumer states there is a problem with the rear traction control, every time the pavement is wet he experiences problems and has almost been in 2 accidents because of this problem.

The auto produced an uncontrollable skid while braking on a wet road and proceeding around a ramp. Rather than proceed left while turning on the ramp requiring only a minor negotiation of a slight hilled and curved road, it proceeded into a right diagonal turn into the guard rail and would have plunged into the adjacent ditch absent the rail. It then bounced off the rail and rather than proceed straight as the steering wheel directed it with a slight turn of the wheel, it took a sharp left diagonally proceeding straight towards the median strip of oncoming traffic less than an approximate 1/4 of a mile away. It suddenly took a straight path after veering within 1/2 yard of the guard rail separating it from the median strip. It had been directed to go straight by the steering wheel much earlier before leaving the ramp. The car performed like an uncontrollable roller coaster off of its tracks.

Engine shut down completely while proceeding across a busy intersetion, consumer was able to shift into neutral and restart engine while still rolling and continued on,engine check light would stay on, consumer had aarm reman sensor asy-engine elec. Replaced, and also pcm reprogrammed.

2001 Grand Marquis has no traction on wet pavements from dead stop. On all 2002 Grand Marquis they added as standard equiptment all-speed traction control. Ford motor CO. Knew about this problem for years.