2009 Mercury Mariner acceleration problems

Filed May 11, 2023 · Acceleration, Electrical · MI

The PCM shorts out and fails when sparkplug and Coil packs replaced this cause the steering system to fail speedometer to quit and no transmission connection

Filed Feb 18, 2018 · Acceleration, Engine · 112,000 miles · FL

Tool light comes on and car loses power in traffic, very, very dangerous. Dealership updated with computer but vehicle is still doing it. Please do a recall ford.

Filed Sep 18, 2017 · Acceleration, Transmission · 122,680 miles · TN

I am getting continual throttle body errors on my 2009 mariner. It goes into low power mode so I can "limp home". It happens mostly on highways when I need to "punch it" and get alot of acceleration.

Filed Apr 21, 2016 · Acceleration, Engine · 70,000 miles · NJ

My 2009 mercury mariner stalls while its idle, at a intersection or just waiting. It stalls then I started up right after it stalls.

Filed Feb 8, 2016 · Acceleration, Engine · 89,000 miles · OH

Tl* the contact owns a 2009 mercury mariner. The contact stated that while driving approximately 25 MPH, the vehicle hesitated and lunged forward as the engine warning indicator illuminated. The contact powered the vehicle off and back on and drove the vehicle without incident, however, the failure recurred approximately two weeks later. The contact powered the vehicle off and back on, however, the vehicle failed to accelerate. The vehicle was towed to an independent mechanic and was diagnosed that the throttle actuator needed to be replaced. The vehicle was repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 89,000.

Filed Jul 17, 2014 · Acceleration, Engine · 132,256 miles · NC

I was driving at 45mph when all of a sudden, the car stop running. I had to pull over and cut the car off. I started the car again and it went about one mile before it cut off again. Then a wrench symbol came on the left side dash board. I drove the car home and it cut off on me three times before I could get it home. I look in my car book to see what the wrench symbol means and it says that it is the throttle control/powertrain.

Filed May 7, 2014 · Acceleration, Brakes · 62,854 miles · NC

While I was driving on hwy doing 75mph my mercury mariner 2009 it suddenly loss power and (while engine was running) I could not accelerate. "tool" light came on. I could not do anything to regain speed (accelerator was disable) and the only fix was to shut down the engine and re-start. Vehicle will start and work normally I took to the mechanics the next day he said that no codes came up.

Filed May 2, 2014 · Acceleration, Transmission · 38,000 miles · IL

The vehicle suddenly accelerated and then slowed down rapidly. Pulled over and put car in park and turned it off. Called my uncle who is a mechanic and was not to sure as to what could have happened since he was not there. Started car and revved the engine to see if anything unsafe happened. Car seemed ok and was able to drive it home. Mechanic looked at it the next day but could not find anything wrong he said or duplicate the problem.

Filed Mar 19, 2014 · Acceleration, Transmission · 59,000 miles · IN

Driving on highway with speed control on at 75 MPH, all of the sudden vehicle rapidly sped up to 95 MPH. The vehicle just took off raving engine up. Applied brakes and took off cruise control. If there had been traffic this could of been a dangerous or deadly incident. We have had the vehicle in before for the same problem, it would speed up while making a turn. Ford dealership said it was a transmission problem. All repairs have been done by a ford dealership.

Filed Feb 7, 2014 · Acceleration, Fuel system · 117,605 miles · IN

Driving home from work the car went into "limp mode", pulled over to side of road, called for tow and had car taken to shop for diagnostics and repair. Shop determined it was faulty throttle body ( there were over 700,000 orders for replacements on website at this time)part was on backorder---came in, was replaced and I paid the bill of $720.60 for parts, labor, towing and taxes. I got letter from ford that part is now a recall item so I take the bill to kerry ford in cincinnati, oh and they take all of my info and send me a check for $167.85 and tell me too bad for not having work done at ford store, that's all I am going to get. This does not even cover the cost of the part alone. So as a stranded motorist, I was supposed to think of a ford dealership first instead of safety first and getting my car repaired.