Ford Mustang Mach E loss of power problems

Filed Nov 6, 2026 · Electrical · NV

As I was driving highway speeds, the vehicle suddenly shut off and lost all power and powered back on.

Filed Oct 8, 2026 · Electrical, Engine · KS

I am reporting a recurring safety defect involving my 2023 Ford Mustang Mach-E Premium. The defect appears to involve the high-voltage battery system, powertrain system, and High Voltage Battery Junction Box (HVBJB). The vehicle and related components are available for inspection upon request. My vehicle experienced failures on May 28, 2026, June 25, 2026, and October 1, 2026. Prior to each failure, the vehicle displayed "High Voltage Battery Warning" and "Powertrain Malfunction/Reduced Power" messages. Following these warnings, the vehicle became completely inoperable and would not start. This has now occurred three times, indicating a recurring defect rather than an isolated incident. This defect created safety risks for both myself and others. During the first incident on May 28, 2026, the vehicle became inoperable while in the drive-through lane of a busy coffee shop. Because the vehicle could not be started or moved, it blocked access to the drive-through during peak morning and lunch periods, forcing the business to temporarily close the drive-through lane. This created a traffic obstruction and left me stranded. On all three occasions, the vehicle became unusable without warning, creating the risk of being stranded and unable to safely rely on the vehicle for transportation. The vehicle was taken to a Ford dealership after each incident for inspection and diagnosis. Despite multiple service visits, the issue has not been permanently resolved, and the same warnings and failure conditions continue to occur. The vehicle and components have been inspected following each incident; however, no repair has successfully corrected the problem or prevented it from recurring. The repeated occurrence of High Voltage Battery Warning, Powertrain Malfunction/Reduced Power, and HVBJB shutdown conditions that render the vehicle unable to start raises serious concerns about the reliability and safety of the vehicle. I am requesting that the federal safety agency investigate this defect.

Filed Sep 28, 2026 · Electrical, Fuel system · TX

While accelerating on a highway on-ramp, the vehicle displayed Powertrain Malfunction/Reduced Power, a High-Voltage Battery Warning. Power was reduced while merging into traffic. The same warnings appeared at about 90,000 miles and cleared on their own. This is a Standard Range RWD Mach-E, which was excluded from the high-voltage battery junction box recall. The vehicle was towed to AutoNation Ford Katy and diagnosed with HVBJB failure. Loss of propulsion at highway speeds is a safety hazard. I am requesting that the federal safety agency investigate whether Standard Range vehicles should be included in the recall.

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 Jun 1, 2026 · Brakes, Driver assistance · CA

While I was driving the brakes did not work. I had to slam on the brakes in order to stop the car. The back portion of the car then skid. The following warnings were sent to the phone and appeared on the dashboard as well. There were more on the dashboard but since I was driving I focused on trying to maneuver the car and not reading the dashboard. Not knowing what happened I continued to drive to duplicate the issue. The brakes were consistently only working when slamming on the brakes (and skidding). There was no traffic, allowing us to rely on driving slow speeds and letting the car to come to natural stops. We took it to the dealership immediately who were unable to duplicate. They diagnosed it as a network overload and attempted to release the car back to us. Currently working with a Ford Advocate as a Network Overload will shut our brakes off again. It's just a matter of when. Which is why they can't duplicate it. They can't predict when the Ford Network that communicates to the MachE braking mechanism will overload again. Powertrain malfunction/Reduced power Powertrain system fault Anti brake fault Anti lock brake system fault Brake system Fault Service brakes Electronic Parking Brake Hill start assist warning Hill start assist fault Pre collision assist not available Collision assist unavailable

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 Jan 7, 2026 · Acceleration, Electrical · NY

I was proceeding to drive home from an appointment with a friend, the car suddenly lost power and I had no control over anything. I was able to keep the steering wheel in the locked position trying to get to the side of the road. Thankfully the speed was only 25mph, as someone had just switched lanes and came in front of me. I was in the process of turning to enter the highway. I've been having a problem with this car since I purchased. I told Ford after this incident, that I fear to drive the vehicle with my family, because that's how scared I was when I had no control. I requested multiple times for someone from Ford Corporate to contact me, and still have not heard from anyone. On 11/26 I received a recall for the 12v battery, which is pretty much what keeps the car on and off, and I still have not heard from anyone in Ford corporate.

Filed Oct 13, 2025 · Electrical, Transmission · AL

Car constantly shuts down at electric vehicle charging stations and has even loss power will driving on highway and bought up powertrain fault