2015 Ford Mustang acceleration problems

Filed Oct 26, 2026 · Acceleration, Electrical · TX

While driving my 2015 Ford Mustang at low speed on a city road, I attempted to activate the hazard warning lights. Because the engine Start/Stop button is located close to the hazard light controls, I accidentally pressed the ignition button instead. I pressed the button only briefly, without holding it down or pressing it multiple times. The engine immediately shut off while the vehicle was still moving. This presents a serious safety concern because an inadvertent, momentary button press can disable the engine during normal driving, potentially reducing steering and braking assistance and increasing the risk of a collision. I believe the placement of the ignition button and the system's response to a brief accidental press warrant a safety investigation.

Filed Oct 9, 2024 · Acceleration, Brakes · CA

While driving home, driving speed was 55 mph, car engine bogged down and orange wrench icon illuminated on dash. I was not far from home and was able to continue and "limp" home. Car would not go faster than 10-15 mph. When I parked car in garage and shut car off, the brake lights stayed on. There was no warning lights or anything wrong with car before incident. Car has not been inspected by dealer or service center. Doing further research online, I was directed to look at drivers floorboard for plastic pieces. I did find broken, yellowish colored plastic pieces on floor board. According to others, which have been experiencing the same issue, the brake light switch stop bumper pad has failed. I was able to find a recall (Safety recall 22S02) that has been issued for this problem, but the recall is region specific. I do not live in the regions listed in recall.

Filed Jul 21, 2024 · Acceleration, Brakes · CA

Hi, I was driving on the freeway and suddenly my car stopped accelerating. I would push the acceleration pedal but it wouldnt speed up. And for a few times it would speed up very much. This was very rapid fluctuation. I also noticed that the cruise control was not working. This was very scary being on the highway with this kind of speed fluctuation. After i came back home, i noticed that the brake light wouldnt turn off at all. After doing some research i found that the brake light switch broke and the car was sensing that the brake was being applied and hence was doing acceleration fluctuations. I also found out that there are many other same vehicles which has the same issue.

Filed May 19, 2024 · Acceleration, Brakes · PA

I ran into the existing issue described in "Part 573 Safety Recall Report" the federal safety agency Recall Number 22V‑011, but in a state not listed under the recall (vehicle purchased used in Pennsylvania in 2017). As a result of this part failing, my brake lights remained engaged permanently, and the car's engine power would increase and decrease rapidly (presumably because it thought I kept hitting the breaks). At time of writing I still have the broken pieces of the original part. I plan to take the vehicle into service within the week. There are no warning lights when this occurs since everything I'm the car is technically "operating correctly" - it just thinks the breaks are engaged constantly, and so has erratic behavior. The original recall lists high humidity as a cause, which Pennsylvania definitely has. I keep my vehicle outside 24/7, so it has definitely been part of many temperature swings.

Filed Apr 16, 2024 · Acceleration, Electrical · OK

Third tail light and rear tail lights remained illuminated after the car was turned off. Driver discovered the brake light switch (rubber/plastic piece) had crumbled into the floor board preventing the tail lights from turning off, thus, becoming a hazard to other motorists on the road as the tail lights remained illuminated even while driving. While the vehicle was being driven, the driver could not accelerate to the appropriate speeds as the car was "thinking" the brakes were being applied and could only approximately drive at 40-50 MPH. The vehicle has been inspected and the above information was confirmed as the issue. No other warnings/messages occurred prior to the piece breaking.

Filed Jul 18, 2023 · Acceleration, Brakes · AZ

The plastic break switch pad broke when I was driving on the highway. I lost engine power and RPMs were erratic. Brake lights would not turn off even when brakes were not applied. I could not excellorate normally or maintain speed. Upon examination the pad was brittle and yellowing. There is already a safety recall for this part but only in certain states that does not include Arizona.

Filed Aug 5, 2022 · Acceleration, Brakes · 54,000 miles · NC

The contact owns a 2015 Ford Mustang. The contact stated that the vehicle was repaired under the federal safety agency Campaign Number: 22V011000 (Service Brakes, Hydraulic); however, while driving with the cruise control activated, the brake pedal was depressed but instead the vehicle accelerated and failed to stop as needed. The contact stated that an excessive amount of pressure was needed to depress the brake pedal while stopping the vehicle. The contact stated that the failure only occurred while the cruise control was activated. The contact had taken the vehicle to the dealer and the mechanic was also able to duplicate the failure. The dealer diagnosed that the cruise control had malfunctioned and caused the brakes to not operate as needed to deactivate the cruise control. The dealer replaced the cruise control switch; however, the failure persisted. The manufacturer was not made aware of the failure. The approximate failure mileage was 54,000.

Filed Jun 26, 2022 · Acceleration, Brakes · TX

Rubber stopper on brake sensor dry rotted and broke off. This caused the car to think I was applying the brakes when I wasn’t. It would cut the throttle while trying to maintain speed and my brake lights were always on even though I wasn’t touching the brakes or in the car for that matter.

Filed Mar 18, 2022 · Acceleration, Electrical · FL

While on vacation (my car was at home) a piece in my brakes broke and caused my break lights to be on constantly. When I tried starting my car the battery was dead. The break likes being on like they were ended up causing my battery to corrode by time I got home from the continuous energy drain. I was able to jumpstart my car but when I went to put my car in drive the vehicle would not accelerate over pretty much idling. When I got my car towed to the dealership (Gary Yeoman's) they told me the break bumper disintegrated and caused my break lights to be on and a vehicle acceleration override to be engaged.

Filed Jun 15, 2020 · Acceleration, Suspension · DC

Pueda revisar todos los untos de mi carro sobre todo el sistema de traccion. I can check all the toes in my car over the entire traction system.