2022 Ford Mustang Mach E: sudden loss of power

Filed Sep 18, 2026 · Electrical, Engine · CA

1) The high voltage junction box failed causing the vehicle to abruptly stall on a public road. The part will be available for inspection through contacting a local dealership. 2) The vehicle completely stalled at night in the middle of a 6 lane intersection. This posed a hazard for myself as well as for on coming and cross traffic. 3) The dealer has confirmed the failure of this component. 4) The vehicle component is being order of replacement at the dealership. The manufacture has also been informed via their corporate customer service line. 4) 5 seconds before the stall, the vehicle user interface displayed the message "please pull over safely". 10 minutes after the stall the Ford My Pass App showed three error messages: “High-Voltage Battery Warning”, “Powertrain Malfunction/Reduced Power” “Charge System Fault”

Filed Jun 6, 2026 · Electrical, Transmission · VA

On 6/4, I completed a long road trip of over 650 miles. When I got back into my vehicle to move it to where it would be parked for the night, it displayed messages for a Powertrain Malfunction/Reduced Power and a High Voltage Battery Warning. I powered the car off and back on within about 5 minutes, and the messages were still being displayed. I connected a code scanner to the car and the car had stored codes P0D0F and P0AA4. Both of these codes indicated a fault with the High Voltage Battery Junction Box, a known issue with the Mustang Mach E. I was able to drive the car to a dealer the next day without incident but am wary of trusting the vehicle to make the same trip back home.

Filed Feb 25, 2026 · Electrical, Transmission · NJ · crash

Vehicle shutdown while driving causing total power loss and hitting a parked vehicle. No alerts or notifications were present at the time.

Filed Feb 17, 2026 · Electrical, Engine · AZ

File against: Ford Motor Company Vehicle: 2022 Ford Mustang Mach-E VIN: [XXX] Safety Complaint While driving, the vehicle unexpectedly slowed down, lost power, and became inoperable, creating a serious safety hazard. I was able to pull over safely, but the sudden loss of motive power occurred during active roadway conditions. Dealer diagnosis identified a wiring harness connector failure affecting communication between vehicle control modules. After the repair, the same issue reoccurred within one to two days, again causing loss of power. The vehicle is currently back at the dealership, and the underlying defect has not yet been permanently resolved. This recurring electrical failure represents a loss-of-motive-power safety risk that may indicate a broader wiring harness defect affecting vehicle reliability and safety. Thanks and Regards INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 16, 2025 · Transmission · IN

I have a 2022 Mustang Mach-E GT and have now experienced two (2) High Voltage Battery Junction Box (HVJB) failures. First failure was in July 2023 when the vehicle had approximately 12,000 miles. I received the stop safely now message. Vehicle codes displayed via the Ford app showed a High Voltage Battery Warning and Power train Malfunction / Reduced Power warnings. I have now received this same failure and warnings again. The car currently has 54,000 miles and I was just advised by my dealer that the HVJB has failed a second time. My concern is that the replacement voltage boxes are nothing more than a Band-aid for the problem and not a permanent solution. As I prepare to receive by 3rd HVJB, I feel this is nothing more than a temporary fix until I receive another Stop Safely Now message while operating my vehicle. Please look into the HVJB failure rate for these vehicles. I am in online two Mustang Mach-E owners groups and this issue is rampant among owners. I feel this issue requires outside attention as Ford has now had 4 years to solve this issue for early produced Mach Es. Yet the issue continues to exist. Thank you for your attention in the matter.

Filed May 18, 2025 · Brakes, Electrical · CA

I was driving my car like normal when a handful of warning signs popped up on the front screen and the brakes went out. I could only stop by pushing on the pedal with all my force, and it eventually slowed the car to a stop, but took an incredibly long distance to do so. A handful of warning lights popped on the screen when this happened: -Power train malfunction/reduced power - antilock brake fault - pre collision assist not available - hill start assist warning

Filed Sep 20, 2024 · Brakes, Driver assistance · NJ

At highway speeds, the power brakes failed. In order to slow the car down, the brakes pedal had to be modulated with extreme force, upwards of 100 pounds of pressure on the brake pedal. As this happened, the car raised 4 Active Alerts - Powertrain Malfunction / Reduced Power - Antilock Brake Fault - Hill Start Assist Warning - Pre-Collision Assist Not Available. It took a lot of force and distance to bring the car safely to a stop. After 20 minutes we restarted the car and it began to operate normally. The car was brought to a nearby dealer immediately, however, the dealership is unable to diagnose nor replicate the problem. ***We were extremely lucky there were no cars immediately in front of us, and that we have an extreme amount of room to stop. Had we been driving in traffic, there would have been an extremely high likelihood of an accident with injury.

Filed Aug 11, 2024 · Electrical, Transmission · MI

I was driving on the freeway when out of nowhere the vehicle alerted me to "Stop safely now". I no longer had any power and could not accelerate. I was doing 70 MPG in the middle lane and had to switch to the right lane, then to the shoulder of a busy interstate. This was extremely dangerous as I was losing speed quickly, and luckily had no one to my right side. If there was traffic I would have been at risk with anyone to my right also at risk. Once I was on the shoulder I tried to restart the vehicle with no success, eventually it just completely lost all power. This vehicle is full electric and had 76% charge at the time of the incident with 23,642 miles. I am very dissatisfied with how unreliable this vehicle was by just turning off in the middle of the road. The worst part was Ford roadside assistance took over 5 hours to get the vehicle towed to the dealership. I was stranded on the side of the freeway, completely unacceptable.

Filed Apr 25, 2024 · Electrical, Fuel system · CA

- What component or system failed or malfunctioned, and is it available for inspection upon request? According to Ford Service, this is confirmed to be a High Voltage Battery Junction Box failure (HVBJB). The part is pending replacement currently at Central Ford, CA. While Ford issue recall (23S56) to replace all HVBJBs in Extended Range and GT model '21 and '22 vehicles built before May 24, 2022, my car was built after the date. - How was your safety or the safety of others put at risk? The failure of HVBJB directly leads to the lose of power suddenly when driving on the highway. I was cruising on california state highway CA-110 while the car pops up "stop safely now" on the instrument cluster. I lost all power for acceleration and relies purely on 12V battery to power the accesories. There was no emergency lane near the location of the incident which leads to the blockage of highway on the junction from CA-110S to I-10W. This post a significant threat to me as the driver and all other drivers on highway. More importantly, the 12V almost died before the tow truck and police could arrive to solve the incident. Fortunately, I was not hit by ongoing vehicles, but multiple vehicles have to brake agressively to prevent collision. The car was unable to be shifted to N or D since the incident. -Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? The vehicle had been inspected by Service department at Central Ford and confirmed by engineers at Ford to be a HVBJB failure. - Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? 2 warnings and notifications can be seen from information cluster: "Full accessory power active", and "Stop safely now." There is no information displayed on the main infotainment screen.

Filed Apr 11, 2024 · Electrical, Engine · TX

Car suddenly lost all power and flashed multiple warnings. Steering also became disabled. This was moving at a low speed through a school zone so it did not cause an accident. After several restart attempts the car moved again but quickly same issue occurred. Car was towed to Ford. Still waiting for diagnostic.

Filed Nov 6, 2023 · Electrical, Transmission · CA

I have a 2022 Mustang Mach E GT Performance edition. I purchased it new and am the first owner. The build date is September 2022 and I received a notification in the Ford Pass Mobile phone application saying: - High Voltage Battery Warning - Powertrain Malfunction / Reduced Power This is a known issue for build dates before May 2022, so my car should've not been affected, but it is. I've scheduled a service appointment for further diagnostics with the authorized service center where I purchased the car.

Filed Aug 21, 2023 · Electrical, Engine · TN

I bought a 2022 mustang Mach e. Which was supposedly fixed at the factory in regards to the HVBJB issue. However, in mid 2023, my vehicle suffered a limp mode/warning about reduced power while on the interstate, was limited to about 60mph with very poor acceleration. Was diagnosed by ford tech as a failure of the recalled part and required HVBJB and BECM replacement, similar to 22V‑412 recall. I think this should be added to RQ23004 investigation, as these vehicles had both the new hardware and software and were supposed to be “fixed”.