general problems of the 2006 Mercury Grand Marquis

19 problems related to vehicle speed control have been reported for the 2006 Mercury Grand Marquis. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Mercury Grand Marquis based on all problems reported for the 2006 Grand Marquis.

1 Vehicle Speed Control problem

Failure Date: 05/10/2020

As I was driving. 35mph my front wheel on the driver side had snapped off causing my vehicle to crash into a parked vehicle. Long story short. I'm going thru a financial crisis. My car was towed by aaa to my house. I notified my insurance company. Why did the police tow my car away from my house? somebody needs to take care of this because I can�t. Transportation is essential to me. Please I need help ## #vpic# 1 - check digit (9th position) does not calculate properly #vpic#.

2 Vehicle Speed Control problem

Failure Date: 03/07/2020

The vehicle accelerated on it's own while stopped with the brake depressed. Once in a parking lot waiting for a spot to clear. The second time while sitting at a red light. I held the brake down as hard as I could while the car did a burn out and I noticed the traction light come on. It then just went back to normal. This is very dangerous. Someone in front of the car (another driver or pedestrian) can seriously get hurt or killed.

3 Vehicle Speed Control problem

Failure Date: 09/02/2018

The vehicle acceleration by it self and could not stop it. Propelled thru the. Brakes and would not stop. We are taking car to Ford dealer. The car engine was stopped and restarted run ok. Not sure if a recall about this yr. With this problem?.

4 Vehicle Speed Control problem

Failure Date: 11/08/2017

The contact owns a 2006 Mercury Grand Marquis. While driving 45 mph, the vehicle accelerated independently. The contact depressed the brake pedal, but the vehicle did not stop. The contact was able to place the vehicle in neutral and depress the brake pedal in order to stop the vehicle. The vehicle was not taken to be diagnosed or repaired. The failure was intermittent. The dealer was not contacted. The manufacturer was notified of the failure. The approximate failure mileage was 170,000.

5 Vehicle Speed Control problem

Failure Date: 01/25/2016

The contact owns a 2006 Mercury Grand Marquis. The contact stated that while driving at various speeds, the vehicle accelerated independently without warning. The vehicle was taken to an independent mechanic but the failure was unable to be determined. The manufacturer was not notified of the failure. The failure mileage was unknown.

6 Vehicle Speed Control problem

Failure Date: 09/21/2014

Upon readying for stop the vehicle surged forward. I had to put in neutral and wait until the surge discontinued. This has been going on for several months. It has become a incident that happens more often. It is very scary. A had jump happens when I put it back in gear.

7 Vehicle Speed Control problem

Failure Date: 06/02/2014

The contact owns a 2006 Mercury Grand Marquis. While approaching a traffic light, the vehicle accelerated when the brake pedal was depressed. The contact had to apply the brake pedal and shift into neutral in order to stop the vehicle. An independent mechanic was unable to diagnose the failure, but replaced the throttle position sensor and throttle body. The manufacturer was not notified. The failure mileage was unavailable.

8 Vehicle Speed Control problem

Failure Date: 03/02/2014

The contact owns a 2006 Mercury Grand Marquis. The contact stated while driving 40 mph, an unknown warning light illuminated on the instrument panel then the vehicle stalled. The vehicle was taken to an independent mechanic who stated that the throttle body system needed to be replaced. Shortly after the repair, the vehicle caught fire and was destroyed. The manufacturer was made aware of the failure. The failure and the current mileages were unknown.

9 Vehicle Speed Control problem

Failure Date: 11/04/2013

On several occasions since I've owned this vehicle (I am original owner) when I step on the brakes hard the engine accelerates. Recently it has gotten worse and I know I'm not touching the accelerator. Today it was so bad the I was standing on the brakes with both feet and burning rubber. I shifted to park and the engine went onto max acceleration. I shut of the engine and restated and found it was still at max acceleration. I shut it off again and waited 30 seconds. When I then restarted it ran normally. Fortunately I was at a stop sign or I think there would have been a collision if in traffic.

10 Vehicle Speed Control problem

Failure Date: 03/21/2011

I am certified safety professional with over 30 years experience working in the occupational safety field. Twice within the last week, my vehicle accelerated to 5000 rpm while pressing the brake pedal to stop at an intersection. My foot was on the brake pedal and not on the gas pedal. I had to quickly shift into neutral to avoid entering the intersection into crossing traffic. Brakes would not hold. A few seconds after shifting into neutral the engine decelerated back to normal on its own. Carpet was not the issue. This is a serious malfunction that could have killed me or someone else.

11 Vehicle Speed Control problem

Failure Date: 07/18/2010

The contact owns a 2006 Mercury Grand Marquis. The contact stated the vehicle surged forward on three separate occasions while the brakes were engaged. During two of the failures the contact applied excessive pressure to the brake pedal to stop the vehicle. On one occasion the vehicle stopped accelerating on its own. The vehicle was taken to a repair shop but the mechanic was unable to diagnose the failure. The vehicle was not repaired. The manufacturer was made aware of the failure and the contact was advised to take the vehicle to an authorized dealer. The failure mileage was 28,000 and the current mileage was 32,800.

12 Vehicle Speed Control problem

Failure Date: 12/28/2009

Car acceleration on its own, estimated start end of Dec. 2009. Estimates that it happens once a month, no clue as to when it will happen. Going to slow down / park, car starts to accelerate on its' own. , have to press hard on brake and use 2 feet. . Brought car into dealer 4 times between Jan thru June , at this point. Dealer says can't find anything.

13 Vehicle Speed Control problem

Failure Date: 07/04/2007

The contact owns a 2006 Mercury Grand Marquis. The contact stated that the vehicle accelerates intermittently. When switching gears from reverse to drive, the vehicle jolts. While at a stop light, the contact had to use maximum pressure in order to apply the brakes. The engine tachometer indicated that the vehicle was at 2000 rpm. The contact stated that the tachometer is normally at 550 rpm. The current and failure mileages were 9,000.

14 Vehicle Speed Control problem

Failure Date: 09/28/2006

: the contact stated while normally applying the brakes, the vehicle lurched forward suddenly, requiring extreme pressure on the brake pedal to stop the vehicle. It was taken to a service dealer, who was unable to determine the problem. Updated 10/18/2006 - prior to the above incident the vehicle lurched forward while approaching a stoplight. The more pressure the consumer applied to the brake pedal the more the engine raced. The vehicle continued to travel forward through the crosswalk and into the street. Luckily no one was in the crosswalk and no cars were coming through the intersection. The consumer has to turn the vehicle off to get it to stop.

15 Vehicle Speed Control problem

Failure Date: 08/05/2006

: the contact stated when entering an off ramp at 30 mph and braking into the turn, the vehicle began to accelerate without warning. Extreme pressure to the brake pedal was applied to slow and finally stop the vehicle. A moment after stopping the vehicle, the engine slowed and began to operate normally. When taken to the service dealer, the problem could not be recreated or identified. The manufacturer was notified. Updated 11/30/2006 -.

16 Vehicle Speed Control problem

Failure Date: 04/13/2006

: the contact stated there were three separate problems with the vehicle. The first problem occurred when the automatic pedal adjuster was being used the engine revved. The second occurred while driving, the accelerator pedal was difficult to depress, after several miles of driving in this condition, the contact pressed and released the pedal and it suddenly resumed normal operation. While in stop and go traffic driving at 20 mph the vehicle surged forward, while the brakes were applied and rear ended another vehicle. Seatbelts were in use; no injuries were sustained to the four occupants of the contacts vehicle, however the driver of the other vehicle sustained injuries. The police were on scene but no report was filed. The vehicle was returned to the rental agency and another model was issued.

17 Vehicle Speed Control problem

Failure Date: 04/10/2006

: the contact stated while attempting to apply brake pressure at low speeds the brakes failed, causing the vehicle to accelerate. The dealership was unable to duplicate the problem. Updated 05/30/06.

18 Vehicle Speed Control problem

Failure Date: 03/01/2006

2006 Mercury Grand Marquis sedan that surge forward while in gear* the consumer stated immediately upon taking delivery of the car the vehicle would occasionally lunge forward. The consumer stated notified the dealer of this defect and the dealer stated that there was no problem with the vehicle. The consumer stated one incident is when a pedestrian was crossing the street in front of the car the consumer had to jam on the brakes to avoid hitting the pedestrian. The consumer stated they feel this is a big safety hazard and would like the problem assessed.

19 Vehicle Speed Control problem

Failure Date: 02/08/2006

When I started the engine each morning on the 2006 Mercury Grand Marquis LS it revved to 2000 rpms for 5 or 6 seconds, then down to 1000 rpms for about 2 seconds, then down to normal. It seemed to me it was going to damage the engine revving so high when the engine was cold and very little oil in the upper portion. What could be done about lowering the starting to rev.


Other Vehicle Speed Control related problems of the 2006 Mercury Grand Marquis


Fuel Economy of Grand Marquis Vehicles
Grand Marquis Service Bulletins
Grand Marquis Safety Recalls
Grand Marquis Defect Investigations