Ford Mustang Mach E fuel system problems

FUEL SYSTEM, GASOLINE

See attached document for complaint

NHTSA complaint #11758437 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

I was pulling into a parking lot at low speed when the car suddenly began accelerating rapidly on its own. Fortunately, when I hit the brakes it stopped without incident. However, if someone had been right in front of me at the time - a pedestrian or car - it could have resulted in a crash. I am certain that I didn't hit the accelerator, nor was it pushed by floor mats or anything like that. It is conceivable that when I was turning, my left palm activated the cruise control in some manner, but that scenario wouldn't explain the acceleration part. And frankly, I don't think that is what happened. I love the vehicle and am not trying to get anything out of it. I am a capable driver with good reflexes and experience. I was able to stop it, but if this were to happen to a new driver or senior driver it could result in a crash. I looked on reddit and many others report exact same issues.

NHTSA complaint #11757918 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

The HVBJB ($3500 + Tax) went on my car. It is out of battery system warranty by 25,000 miles (ended at 100,000 miles, I have 125,000 miles). I called Ford Corporate and they said they "have no current programs" to give me any good will discount on the repair. This is a big, known issue with Mustang Mach-e's There was a recall for this HVBJB part / system on many of the 2021 models, but somehow mine wasn't included in the recall. I cannot afford this repair, and I was hoping the NHTSA can get involved to get me some financial relief from Ford. There was also a safety issue as this morning when this all happened, the car forced me to stop at an intersection and would not move or restart. The police had to push me through the intersection. It's currently at Chapman Ford in Egg Harbour Townshop, NJ.

NHTSA complaint #11755300 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

The exact failed component is unknown to me at this time, but the issue appears related to the vehicle’s electrical system. Prior to the incident, I received a charging error notification while the vehicle was plugged in. I unplugged the charger from the wall outlet, waited briefly, and plugged it back in. Later that same day, the vehicle entered a no-start condition and would not start despite repeated attempts over approximately two hours. The vehicle is available for inspection upon request. The vehicle left me stranded at night for approximately two hours without warning. Because the vehicle would not start, I was unable to reliably move or operate the vehicle. Depending on location, weather conditions, surrounding traffic, and other circumstances or emergency situations, this type of failure could place occupants and other drivers at risk. Additionally, I previously reported a separate safety-related incident involving this same vehicle in February 2026 in which the vehicle suddenly and unexpectedly accelerated in my daughter’s daycare parking lot. This has not been reproduced. The vehicle unexpectedly started and operated again at approximately the same time the tow truck arrived, after remaining inoperable for roughly two hours. Because the issue resolved itself without repair, it’s not clear what the root cause is. The vehicle has not yet been inspected. The vehicle has remained garaged following the incident pending further evaluation and communication with Ford. There were some warnings. Prior to operating the vehicle that evening, I received a charging error notification while the vehicle was plugged in. After unplugging and reconnecting the charger, the vehicle later experienced the no-start condition. During the incident, the vehicle provided no clear indication through the vehicle interface or mobile app explaining why it would not start, only “Stop safely now.”

NHTSA complaint #11739976 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

The vehicle experiences a drivability issue where it stalls or loses power and is not safe to operate. The vehicle is currently undrivable and has been at the dealership for nearly one month without a completed diagnosis or repair. The dealership has indicated a possible powertrain or transmission-related issue, but no confirmed repair has been completed. Additionally, there is an active safety recall associated with the vehicle that has not been repaired multiple notifications. This situation poses a safety risk and remains unresolved despite repeated follow-ups.

NHTSA complaint #11735308 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

After recall-related software updates were performed on my 2021 Ford Mustang Mach-E, the vehicle began experiencing repeated electrical and climate control failures. The heating and defrost system stopped working, leaving the vehicle without heat and causing the windows to fog, which reduces visibility in cold weather and creates unsafe driving conditions. The vehicle has been taken to multiple authorized Ford dealerships for inspection and repair; however, the problem returned immediately after the repair. The issue was reproduced and confirmed by a second dealer. A required part is currently on back order until the end of Feburary, leaving the vehicle unrepaired for an extended period. In addition, the vehicle experienced 12-volt battery failure and slow charging after the last recall update. These issues were not present prior to the recall. There were no warning lights before the failures occurred. During severe winter weather conditions in Pennsylvania, the lack of heat and defrost made it extremely difficult and unsafe to operate the vehicle. Because of reduced visibility and freezing interior temperatures, the vehicle could not be safely driven and, due to frigid temperatures, has remained parked. I am still making monthly payments on a vehicle that cannot be reliably or safely used.

NHTSA complaint #11716499 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

While picking up my daughter from school this week, I entered a school parking lot and began a low-speed right turn to pull into a parking space. During this maneuver, the car unexpectedly and abruptly accelerated forward. I reacted immediately and applied the brakes, but the car traveled approximately two car lengths beyond the intended parking spot. I came to a stop across two parking spaces. This occurred in an active school pickup area with parents and children nearby. There were no cars or pedestrians directly in front of me at that moment. I still fear what the outcome might have been if anyone had been present. Immediately after stopping, I observed that the adaptive cruise control speed indicator on the instrument cluster was set to 15 and was crossed out, indicating it had recently been active and disengaged. However, I did not engage adaptive cruise control during that trip. Based on the car’s behavior and the display state, my best assessment is that adaptive cruise control was unintentionally engaged during the parking maneuver causing the car to attempt to accelerate toward a previously set cruise speed despite being in a low-speed, turning scenario. Again, I did not use ACC on this trip. A sudden acceleration in a school parking lot presents an extreme hazard. The only reason this incident did not result in injury or death was immediate braking and luck. There were no warning lamps or messages prior to the incident. The car has not yet been inspected by a dealer or manufacturer. I am aware of multiple publicly shared videos from other Mach-E owners documenting similar incidents, some resulting in crashes. This appears to be a systemic adaptive cruise control design or software issue that warrants immediate investigation and correction to avoid serious injury or death.

NHTSA complaint #11716373 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

Car stalled once while going to a military appt but started up 3 mins later. Car then made a noise then stalled out of nowhere on the highway at a slow speed in heavy traffic causing anxiety. vehicle then had me stranded waiting for a tow to find out it’s the HVJB .

NHTSA complaint #11693497 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

I’ve had this situation happen at least 2 to 3 times but specifically I’ll talk about the most recent. I was reversing out of my parking spot approximately 20 feet or so to where I can turn around and circle around the parking lot and exit. When I switched over to drive the vehicle accelerated rapidly unprompted. I was able to stop it by using the break, but I can also see how this could be a significant safety issue.

NHTSA complaint #11692968 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

On 2 occassions in the past 2 week, our Mustang Mach E has accelerated on its own. In the first incident, it was a minor acceleration. It caught me by surprise as I was pulling up to a curb to drop off a passenger. It was easily stopped with brake pressure. In the 2nd incident, the acceleration was greater and more pronounced while pulling into a parking spot, requiring the pressure of both feet to quickly stop it before it went up onto a sidewalk and into a store front. It's never done this before, but certainly could cause an accident and was unsettling. We have not taken it to the dealer because it is random and not replicate-able. There were no warning lamps or error messages at the time. The vehicle was functioning and acting normal otherwise.

NHTSA complaint #11689571 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

Shift system fault in the middle of the road. Unable to shift to Park, vehicle stuck in middle of road unable to shift to Drive either. E-brake auto engaged on street. Vehicle tells me to shift to Park but is unable to shift. Vehicle odometer is under 900 miles. New lease.

NHTSA complaint #11685189 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

I lease a 2024 Ford Mustang Mach-E. On [XXX] the vehicle suddenly displayed a High-Voltage Battery Fault, Powertrain Malfunction / Reduced Power warning. The dealer replaced the High-Voltage Junction Box (HVJB), however I am unsure whether the actual root cause was ever identified. This failure shows a major defect in the high-voltage electrical system. Separately, my vehicle is also subject to Recall 25S65 / NHTSA 25V404, where a discharged 12-volt battery can prevent the electronic door latches from opening, risking passenger entrapment. Ford has no remedy available and has only projected a future software update. My car is still at the dealership. These two issues are connected: the HV system (through the HVJB) powers the DC-DC converter that keeps the 12-volt battery charged. A failure on the HV side can starve the 12-volt system, which directly creates the entrapment risk described in the recall. I live in Florida, where extreme heat makes this risk especially dangerous for children, pets, and elderly passengers. What is my emergency plan...carry a hammer to break the windows on every trip? This is an unreasonable and unsafe expectation for consumers. Ford has not provided any fix or assurance of safety. I have specifically asked Ford whether my car is safe to drive — they have not provided any assurances, merely repeating that Ford has not issued a stop-driving order on the vehicle. This unresolved defect substantially impairs the use, value, and safety of my vehicle, and Ford has failed to provide an adequate repair. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11682272 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

Recall Action Soon Issue Since 06-20-2025 Powertrain control module and secondary on-board diagnostic control module c software upddate For More Information Telematics Generated Issue Recall Action Soon Issue Since 04-25-2025 Drivers side seat buckle replacement For More Information Telematics Generated Issue Recall Action Soon Issue Since 11-08-2024 2021-2023 model year mach-e vehicles paint sealant issues - door hems inspection - repair For More Information Telematics Generated Issue

NHTSA complaint #11674867 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

At [XXX] on Tuesday [XXX] while driving our 2023 Ford Mustang Mach E GT eastbound in the left lane on [XXX] near the [XXX] intersection the car suddenly stopped. There was a second or two of multiple warning notices then the car instrument panel went blank. The car “bricked” as is known in Electric Vehicle jargon. There was no power to anything, and the stop was sudden and steering was extremely difficult. Washington State Patrol and Washington Department of Transportation responded to provide safety assistance while eastbound traffic on [XXX] backed up for several miles. The car is now at Frontier Ford in Anacortes Washington and they have confirmed its status as completely dead. In fact it took almost an hour to get the car off the tow truck. The dealership tried several battery jumper options to the 12v battery but when they worked it seemed to only work for a few seconds before the car “bricked” again. There is probably a WSP police and WSDOT report about responding to this incident. In the seconds before the complete electrical shutdown there was a cascade of warning notices then everything went blank and the car abruptly stopped in traffic. It took over an hour to get a tow truck and then the cars “bricked” status made the towing job very difficult and eventually the car was literally dragged onto the flatbed with a winch. This incident happened during rush hour in heavy traffic and both occupants safely was put at high risk of a high speed collision from traffic approaching from the rear of the car. We have made two reports to Ford Customer Service. Case # [XXX] And case # [XXX] The suddenness and inability to maneuver and get out of traffic is a real safety problem that can lead to a severe accident. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11672199 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

I was driving my car when all of a sudden it lost all acceleration and power, I was lucky that I wasn't on the highway anymore and was able to pull over safely on a side street while car was rolling still. Dealer said 12V battery fused, and I have been reading forums where this is a common issue.. In a normal ICE car when 12V battery dies while driving, car can still drive, in this case, it just stops and pops up a dozen errors about everything being broken.

NHTSA complaint #11671895 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

What component or system failed or malfunctioned, and is it available for inspection upon request? The high-voltage battery system and powertrain system both failed. The vehicle went into limp mode, showing alerts for “Powertrain Malfunction / Reduced Power” and a “High-Voltage Battery Warning.” The vehicle is available for inspection if requested. How was your safety or the safety of others put at risk? The incident occurred while driving on the freeway at 75–77 mph, which significantly increased the risk of a crash. The sudden loss of power in heavy traffic was dangerous and could have led to a collision. Has the problem been reproduced or confirmed by a dealer or independent service center? Not yet. The issue has been documented through the Ford app and in-vehicle warning messages, and I am in the process of waiting for a diagnostic to be completed by the dealer. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? Waiting for dealer to look at it. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? Yes, immediately before and during the failure, the vehicle and the Ford app displayed messages indicating a powertrain malfunction/reduced power, along with a high-voltage battery warning alert. Additional description: While driving on the freeway at approximately 75–77 mph, the vehicle suddenly entered limp mode with a dramatic reduction in speed and power. Warning lights for a powertrain malfunction and high-voltage battery appeared. This created an unsafe situation in high-speed traffic. The vehicle had approximately 1,459 miles at the time of the incident. This also happened on my 2022 ford mustang Mach E 8 other times. VIN: [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11652198 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

It has several error messages including "Stop safely now". This seems to be the same issue as recall 23S56 (TSB 22-2178). The vehicle is not drivable as it will not start or go into gear. Seems to be known issue with the HVBJB.

NHTSA complaint #11632397 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

It accelerated unexpectedly with no input while decelerating in one pedal drive mode. Cruise control was not in use at all during the drive.

NHTSA complaint #11623040 — an unverified report by a vehicle owner.

FUEL/PROPULSION SYSTEM

Ford knowingly sold unsafe vehicles. NHTSA caught them and forced a recall on the High Voltage Junction Box (they are still failing, so you may want to look into this). But what they have hidden from you and all of it's customers that they suckered in buying their defective product, is that the front motors, have undersized wiring, which could cause a fire . They have attempted to hide this from the public, by limiting the power of the car to 5 seconds of full power and then dramatically decreases the power after that. The sold the cars to consumers without revealing that fact, so folks bought the performance "GT" versions and yet they are neutered. It's only a matter of time, where those tiny wires in the front motors give up and start causing fires. It's time for the government to stand up for he consumer here. I've brought it to [XXX] 's attention, but they are hoping we all go away and allow them to get away with selling a defective potentially dangerous vehicle INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA complaint #11621808 — an unverified report by a vehicle owner.