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NHTSA — Vehicle Speed Control Problems

2010 Mercury Mariner (Page 1 of 4)


really awful
Crashes / Fires:
1 / 0
Injuries / Deaths:
2 / 0
Average Mileage:
53,092 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2010 Mercury Mariner engine problems

engine problem

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2010 Mercury Mariner Owner Comments (Page 1 of 4)

problem #65

Jul 232016


  • 127,005 miles


Electronic throttle body P2119 code. All of the sudden losses power going into or out of traffic and the wrench tool light "lights up" it may go away by itself or not, "cut be scary" at times it has shut down in several instances on my own St or down the ave or another town etc... for no apparent reason it happens while turning or during acceleration at one point I had to wait for several minutes on the highway before starting the vehicle again and I get similar codes related to tbs powertrain and the fuel cap I noticed that when filling up, I need to stop pumping gas once it has stops automatically, without me topping it off not even once! and the light will most likely will not come on, it may go away by itself if not I erase the code.I clean the electronic throttle body last summer and it has run with no problems at all until now! well a month a go! this summer I am getting lots of problems with the tbs again same symptoms like before all over again, except for the gas light. Thank you

- New Haven, CT, USA

problem #64

Oct 202014


  • 78,000 miles
Vehicle surges wildly at idle speeds in traffic. Vehicle stalls out while driving regular highway speed, surges wildly while driving, RPM spikes drastically while driving and at idle. Stalls and surges both while entering traffic from a stopped position and while driving at regular pace. Struggles to crank after fueling the vehicle. Spits and sputter and shakes while at idle....updated10/20/15

- Lynn Haven, FL, USA

problem #63

Mar 082015


  • 73,400 miles
The car would not accelerate and the wrench symbol illuminated. I had to pull over turn off the car and restart it.

- Mount Vernon, AL, USA

problem #62

Aug 122014

Mariner 4WD 6-cyl

  • 63,000 miles


Driving from columbus to cincinnati around 1:00 am with my daughter, son and 15 month old granddaughter. The car lost all power leaving us stranded on the side of the road. As I pulled over the car began to shake, almost like there was water in the gas line. I turned the car off, waited a few minutes and then restarted. The car reset itself and luckily we made it the rest of the way home. Not too long after that, I was driving home from work and it did the same thing. Except this time, it would only go about 2 miles before it would quit again. This is a very dangerous issue. No only could I have been in an accident, but being stranded on the side of the expressway in the middle of the night with an infant was terrifying! I had the throttle valve sensor replaced and there has not been any additional instances of power failure.

- Cincinnati, OH, USA

problem #61

Aug 112012

Mariner 4-cyl

  • 43,757 miles
On that date, I was driving home with my wife at approximately 2 pm. Suddenly, the car went off and the steering wheel went stiff. As I tried to move unsuccessfully, we went down to a slope of about 20 degrees. As a result, both of us had to be taken for emergency treatment for knocks, cuts and follow up checks. So far, it has cost us $16,497 and repair of the car us$6,853. There has been other events where the car suddenly stops and the steering wheel becomes stiff. But, I don T use the car in the highway but only for shorts errands and within the area where we live. Its been a nightmare. I have changed the throttle casing module, the restraint control module, I put a rubber stop on the acceleration pedal, etc. Again, out of the accident it has been over 4 thousand dollars in trying to fix the car.

- Miami, FL, USA

problem #60

Oct 072014

Mariner 6-cyl

  • 42,000 miles
Car felt like it was running out of gas. We pulled off the street and shut it down and waited, we had plenty of gas. We started it back up and it seemed ok, the engine and power train lights remained on. Since I had taken it in for the recall already and we were close to southgate Ford we pulled into the service area I spoke to the service person and was told it would cost $600 to fix. I mentioned the recall, he said that was just for the software we then left an went to auto zone where they put their diagnostic tool on the car and the print out read there was a problem with the throttle body. Ford dealers refuse to replace the throttle body under the recall.

- Southgate , MI, USA

problem #59

Oct 022014

Mariner 6-cyl

  • 30,000 miles


Coming to a stop at a red stop light and then trying to accelerate from red to green light at an intersection my vehicle went into limp mode, it lost power. It would not accelerate pass 10mph. An engine light came on as a orange wrench light. I drove as I could and made to auto zone. They plug in the hand held car computer and it gave the code P2119. Which stands for throttle body.

- Russellville , AR, USA

problem #58

Sep 282014

Mariner 4WD 4-cyl

  • 126,000 miles
My vehicle suddenly stalled when I was driving and no matter how much I tried to press on the would not move safely. I was very lucky because this was at a traffic intersection on beechmont and eight mile. I proceeded to drive it to the enterprise parking lot albeit it was extremely slow and I had cars honking at me because of the lights on the intersection. The mechanic repair shop says it's the throttle body.

- Cincinnati, OH, USA

problem #57

May 032014


  • 48,000 miles
I had two separate occasions of my car stalling in the past three days. On May 1st I was traveling at about 40 mph when my wrench light came on and the car stalled out. Fortunately there was a median right by me and I was able to hurry up and move over before the car came to a complete stop. On May 3rd I was traveling at about 35 mph when the wrench light came on and my car stalled out in middle of the road. This time I was stuck in middle of the road but no one was behind me. I was able to restart the car and continue driving. If this had happened on the main road then there would have been a good chance of an accident occurring and harming me or my children.

- Port Orange, FL, USA

problem #56

Jan 302014

Mariner 4-cyl

  • 50,000 miles
Twice in two days while speeding up to get on highway my Mariner looses complete power and the wrench light comes on. Lucky for me it was just before I was turning on to merge. Seconds later it would have been a serious accident, due to the sudden stop. I had to shut the car off and start it back up in order to get going again. After reading #PE13003 has been file for the same exact problem with same make and model. Someone better react before someone looses a life. This is horrible.

- Sarasota , FL, USA

problem #55

May 112011

Mariner 6-cyl

  • 17,000 miles


In 2011, while driving at approximately 60 mph, I pressed the gas pedal and could not accelerate. The engine stayed on but I could not accelerate. I was able to turn on the hazards and pull off to the side of the highway. I turned off the vehicle and after waiting 5 minutes I restarted the vehicle and the gas pedal was working. Then again in October 2013, I was driving approximately 30 mph when I lost acceleration capability. This time the throttle body indicator light was displayed. I took the vehicle in to a mechanic and he stated that nothing registered on the computer as a malfunction. He looked at the intake valve and could not see any build-up. In January 2014 this happened 3 times and I was able to restart the vehicle and proceed. However, on January 11, 2014 after the malfunction the vehicle did not reset immediately now the check engine light is displayed.

- Austin, TX, USA

problem #54

Dec 312013

Mariner 6-cyl

  • 25,134 miles
When accelerating through an intersection, my vehicle lost acceleration power and the power brakes failed. After restarting the vehicle, the vehicle was slowly moved to a side street, backing-up traffic on the busy street. The vehicle was towed to a Ford dealership and the diagnosis was that throttle body needed replacing. The service cost me $503 plus tax.

- Conroe, TX, USA

problem #53

Dec 192013

Mariner 6-cyl

  • 37,950 miles
The vehicle shut off while driving. This re-occurred several times during the next 8 days also while driving, one time while making a left hand turn across oncoming traffic. We researched the problem and had two estimates done and contacted Ford Motor Company. The throttle body had to be replaced and the repair cost us $400 dollars. We have researched this problem and have seen that this is a very common safety problem. We spoke with our neighbors who have a Ford escape and already had their throttle body replaced as well for the same problem. We were told by the dealership that the new part is designed differently now, so this should not happen to us again. This has to be a recall item. It is obviously a manufacturing defect and is a huge safety concern. Ford should have to be responsible for these charges. We are very disappointed that Ford has not taken responsibility for this issue and that all of us have to pay for a defective system that Ford Motor Company knows is a problem, and could have been the cause of a major accident.

- San Antonio , TX, USA

problem #52

Dec 222013


  • 50,000 miles
Was at stop light completely stopped. When the light turned green, I stepped on the accelerator and my car did not accelerate. The engine light and another light came on. I tried multiple times to move the car and nothing happened. I powered my car down and restarted it, at this time the car started moving again when I pressed on the accelerator.

- Ellicott City , MD, USA

problem #51

Nov 212012

Mariner 6-cyl

  • 40,000 miles
Going 65 miles down interstate during rush hour traffic and lost all power had to weave to side of road to get out of traffic had to have repaired was throttle body.

- Bellevue, NE, USA

problem #50

Nov 202013

Mariner 4-cyl

  • 47,000 miles
While driving in heavy traffic in center lane of three line highway. Vehicle suddenly lost power creating a emergency situation. I had to force traffic to allow me proceed to side of the road. Endangering myself and my family, I sat for about 30 min. Before I could move the vehicle.

- Columbus , GA, USA

problem #49

Nov 012013

Mariner 6-cyl

  • 40,000 miles
My wife was driving in town and the car began to "buck" and slow down. After a few minutes the accelerator had no effect on the engine. It appeared to be idling only. She pulled off the road and stopped the car, waited A10 minutes or so, and started it again. There was no difficulty starting the car, but again the accelerator had no effect on the engine speed. We had the car towed to the local dealership where it was diagnosed with a bad throttle body and throttle motor. The repairs cost approximately $500.

- College Station, TX, USA

problem #48

Oct 302013

Mariner 4-cyl

  • 80,000 miles
Car stalled while my granddaughter was driving on the highway. It also did not accelerate. She had to step on the brakes to get the car to move. She immediately got a diagnosis from auto zone (throttle body system open- P2111), then took the car to the Ford dealership where the problem was confirmed and repaired. An emergency light came on during this problem.

- Scurry, TX, USA

problem #47

Oct 012013


  • miles
I have been having a problem with my 2010 Mercury Mariner for over a month. It is stalling out at random times and then the vehicle dies. Took to dealership several times and the computer is not detecting the problem so they cant determine what to fix. The dealership says it may me the throttle body, but this is not covered in my extended warranty and is a very expensive part to replace. I am a single mother with 2 kids and this is very dangerous when we are driving down the highway at 75 mph with traffic.

- El Campo, TX, USA

problem #46

Oct 182013

Mariner 4-cyl

  • 49,000 miles
The vehicle started to stall when the accelerator peddle was engaged, after turning vehicle off and restarting it would travel approximately 50 to 100ft. Before again stalling.

- Kansas, OK, USA

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