2012 Ford Mustang acceleration problems

Filed Feb 8, 2025 · Acceleration, Electrical · FL

Speedometer went to zero while driving and seemed to be in neutral. Could not accelerate. Also low fuel warning light came on when I had a full tank. After car was shut off and restarted speedometer seemed fine for about 1 mile, then self accelerated. Now continues to read zero and can not accelerate unless I restart engine.

Filed Feb 20, 2024 · Acceleration, Transmission · CA

Recently started having erratic shifting issues. Will downshift randomly out of nowhere while driving. Sometimes will just be stuck in 1st gear and won’t go anywhere until I pull over and shut off/start up again. Dangerous because I never know when it will do it. Might seem like everything is fine and then all of a sudden, it downshifts and loses power. Rpm’s rise but car has no power. Have to figure out how to get out of the way. As stated in ford’s “ Customer Satisfaction Program 16N02,” my 2012 has all the symptoms and I have DTC code P0731 but dealer refused to service my vehicle because it doesn’t show up with my VIN, even though it’s a 2012 and I clearly need my Molded Leadframe replaced.

Filed Apr 20, 2019 · Acceleration · 4,122 miles · TX · crash · 1 injury

In 2012 or 2013 I had an accident caused by unintended acceleration. The mustang ran into the back of semi truck. Unattended acceleration happened twice in the same day and the second time I could not get it to break free and stop until the last second but it was too late it hit the semi truck trailer in front of me. This was inspite of me having both feet pushing strongly on the brake pedal. We had started off slowly from a red light and then the car downshifted and took off. Southwest ford in weatherford, tx had called the ford engineer to come look at it. It took a month for him to come. He looked at it in its banged up shape and declared that there was no problem. When I got the car back something had changed. It seemed like the software had been changed because it never had the problem again and whenever the brake was touched it would kill any acceleration immediately. Also I lost about 3 miles per gallon till this day. The engineer blamed me when he obviously updated the software. Also the very next day after the engineers visit ford was hit with a class action lawsuit for just this reported unattended acceleration across most of its models. Not my fault!

Filed Mar 25, 2019 · Acceleration · 64,667 miles · GA

Tl* the contact owns a 2012 ford mustang. While accelerating from a stop, the vehicle failed to accelerate and the wrench warning indicator illuminated. The vehicle was taken to john bleakley ford (located at 870 thornton rd, lithia springs, ga 30122, (770) 941-9000) where it was diagnosed that the output shaft speed sensor needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and did not assist. The approximate failure mileage was 64,667.

Filed Mar 8, 2019 · Acceleration · 57,300 miles · ID

While accelerating on a public highway the throttle went straight to redline and would not decelerate until the transmission was shifted into neutral and the motor was completely shut off. Vehicle was restarted by setting the key back to run and placing the clutch back in 2nd gear while in motion. The car could have easily injured motorist's had it not been shut down in properly.

Filed Jun 25, 2018 · Acceleration · 68,000 miles · AL

Crossing lanes on highway car stops accelerating,. Car unable to speed up everything else seems to works fine. Check engine light and wrench come on. Had to coast to side of the road park checked engine restarted car operated normally all warning lights off.

Filed Apr 1, 2018 · Acceleration · 80,000 miles · NC

Lost power in my 2012 v6 mustang. Wrench light came on indicating limp home mode. Was able to pull off to the side of road. Turned engine off and the it was fine for about two miles then cut off again. Restarted again and was able to make it home but the engine light is on. Going to try and get it to the shop tomorrow, but this is a severe safety problem in my mind. Was lucky I didn't get rear ended

Filed Mar 8, 2018 · Acceleration, Driver assistance · 73,000 miles · KY

Tl* the contact owns a 2012 ford mustang. While driving 45 MPH, the accelerator pedal was depressed and the vehicle jerked hard to the left for almost a minute before stopping. The traction control indicator flashed on and off and the ABS engaged. The vehicle was taken to oxmoor ford lincoln (100 oxmoor ln, louisville, ky 40222, (502) 426-2500), but no diagnostic failure codes were found. The vehicle was not repaired. The manufacturer was notified and a case was opened, but no further assistance was provided. The approximate failure mileage was 73,000.

Filed Feb 7, 2018 · Acceleration · 5 miles · FL

I was driving my car and it just went into a idle mode barely moving a light came on it look like a tool checked in my manual and it was the electronic throttle light I was driving in heavy traffic going to work had to make to were I could turn off the highway barely made it it could of cause an accident I looked up on line and nccc had a petition on the problem with the electronic throttle ford does not have a recall instead they extended warrant but I onlyhad the car for about 6 months and no extended warranty it has 180,00 miles on it I could of cause an accident I think ford should replace this its a known fact that the electronic throttle is a problem with fords

Filed Aug 2, 2017 · Acceleration, Transmission · 50,000 miles · FL

Tl* the contact owns a 2012 ford mustang. The contact stated that while driving at various speeds and idled, while the accelerator pedal was depressed and the vehicle failed to accelerate. The contact stated that the wrench warning was displayed (power train fault). The contact stated that he used a diagnostic machine and received an unknown code. The vehicle was taken to oxmoor ford lincoln 100 oxmoor ln, louisville, ky 40222, phone number: (502) 426-2500 where the failure could not be replicated. The vehicle was not repaired. The manufacturer was notified of the failure and stated that the VIN was not part of the recall but did not offer any further assistance. The failure mileage was 50,000.