2021 FORD MUSTANG MACH E Vehicle Speed Control Problems

When in cruise control, any speed, car suddenly accelerates This happens while driving, or sometimes after stopping and then resuming previous set speed. For example I was driving in cruise control at 38 mph, when the car suddenly sped to 50mph. Or when on a highway, driving at 55mph, the car suddenly accelerated to 70mph. Started about 3 weeks ago.

A KNOWN faulty camera problem for 100s of Ford EVs. Starts off as very intermediate warnings until it stops working all together. This problem doesn't allow you to use cruise control and a host of other standard safety features. This should be a recall, I can't imagine someone getting hurt or worse because ford isn't getting ahead of this thing.

Was driving and suddenly all errors started popping up Hill start assist warning 1 pedal driving unavailable Pre collision assist not available Antilock brake fault, etc Lost braking power, steering got stiff, accelerated suddenly.

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

Front camera stopped working after a long period of working intermittently (started to happen after passing warranty at 30,000 miles). Without that camera many safety features are disabled, like a front collision warning, lane departure, cruise control with adoptive speed, emergency breaking. The cable and processor issue was confirmed by Ford dealership service.

The car is frequently but intermittently reporting a failure with the front camera: "Front camera fault Service required". When this happens, the adaptive cruise control and other ADAS are disabled, which is a safety hazard while driving the car, especially at highway speeds. This issue began very infrequently in March 2024 and now happens on the majority of trips when driving the vehicle. I took the car to a Ford service center for repair. They did a software update on the car and told me that they were sure that the update would fix the issue. The front camera fault re-occurred within a week after having the software update done.

Received intermittent warnings that the front collision warning system, cruise control and front camera were not working. The problem I think began after having my roof/windshield removed/reglued under recall. It was intermittent and I could not tell if software updates were resolving the problem, but then the problem became permanent at which time my car was out of warranty. Which does not seem fair since the problem began during the warranty period,. likely as a result of the windshield recall.

Received a front camera fault warning in the car. The fault disables the safety feature of pre-collision-collision assist. Had an independent service center check it out, they let me know there is a TSB from ford. Waiting for the a scheduled appointment.

When stopped at a stoplight, in unbridled mode with one pedal driving engaged, the car surged forward on it's own. The surge forward caused my vehicle to rear-end another vehicle. I would assume the failure was the one pedal driving system and it is available for inspection. The problem has not been reproduced or inspected yet, but we have an appointment for a Ford dealer to evaluate the car. The only warning was the pre collision warning which did go off.

I am getting a warning in the car that the front camera is failing. The warning includes an error that the front camera failed, and that the forward collision is unavailable. Each time this happens, this causes the cruise control, lane centering and lane departure systems to disengage, which means the vehicles hard brakes at highway speeds when this happens. It disabled forward collision detection when this happens. Ford has TSB for this but when I took it in for repair/replacement they said it wasn't covered by anything and charged for the fix.

Having completed the high voltage junction box recall with the Mach-E a week or so before, I was braking in order to complete a left-turn in one-pedal drive mode (therefore lifting my foot off the accelerator causing the vehicle to slow down). I received a notification as I did so that one pedal drive mode had a fault and was deactivated (this appeared on the screen by the steering wheel). This caused the car to lurch forwards, as it shifted from OPD to standard drive mode. Fortunately no cars were ahead of me and I was able to quickly slow the vehicle by braking, but I'm alarmed as to what would have happened had this been in traffic.

The 2021 Mustang Mach-E has repeatedly shown these "Pre-Collision Assist" and "Front Camera Fault" errors ever since we got it 6 months ago. The errors can come and go multiple times during any drive. For my wife it is just an annoyance since she never uses Adaptive Cruise. But for me or anyone else using Adaptive Cruise, it becomes a safety concern because this error suddenly cancels the cruise and being an EV it begins regenerative breaking and slowing down much faster than other drivers expect while its driver must react as quickly as possible to return to pedal control. It's my understanding that this is starting to happen on many modern Ford vehicles at around this age and dealership service centers have been given guidance on fixing it. Ours has been in for this service and the error is still occurring.

I drove the car to work with no issues. I left work a little over 9 hours later. I was able to enter car without issues. Turned on car and didn’t notice any issues. My phone connected as usual via CarPlay and I navigated home. Leaving the work area is low speed, so I never exceeded 20 mph and just went by feeling, but once I was on a more open stretch of road, I noticed that the instrument cluster was frozen and the speed it was displaying felt too slow compared to how I felt I was going. In essence, I couldn’t tell how fast I was going. After closer examination (mind you I was driving while figuring this stuff out), I noticed that the instrument cluster would update once in say 10seconds or so (but it was variable). I tried to set cruise control to initiate blue cruise, but I couldn’t tell what speed cruise control was being set to due to this enormous lag. I also wasn’t sure if the system would also exhibit this lag. Finally, I noticed that even the lights indicator for the blinker would refresh very slowly but the audible “click” associated with the blinker was normal. The drive home was very distracted and painful due to this issue. I documented the behavior in a video if needed.

I have complained several times with Ford Dealers to fix the issues involving my vehicle accelerating on its own. The vehicle within a week will accelerate on its own 4-6 times when exiting a parking spot or my driveway.

After transitioning from i35 south, to Highway 183 towards Austin-Bergstrom International Airport, the auto-pilot (Ford Blue Cruse) fails, the speedometer fails, the battery level indicator fails, the instrument cluster fails, cruse control picks a random speed and struggles to keep it, lane keep assist is erratic at best. This occurs every time, and in both directions, I take my vehicle on that highway. I took a video of it this last time, and offered it to Ford. They recommended I file this report with this agency.

Vehicle in Adaptive cruise will unintentionally accelerate when a motorcycle is lane splitting to the right of the vehicle, causing the vehicle to accelerate towards a slowing or stopped vehicle. This puts me and other motorists at risk of a crash.

There is a software problem which was introduced in a previous OTA which causes drive modes to change. These drive modes are Whisper, Engage, and Unbridle. Each has their own acceleration/throttle response characteristics, as well as steering and suspension feel. You also have the ability to enable one-pedal drive in the drive mode menu. The software bug will randomly throw an error on the main screen that says "Drive Mode Not Available" change your drive mode from Whisper or Unbridle to Engage, affecting the throttle response that can occasionally lead to unintended acceleration. On occasion, it can also lead to disengaging of the one-pedal drive mode at the same time, which can cause the vehicle to not slow down when the foot is lifted off the accelerator. If the driver is unaware that 1PD has become disengaged unintentionally (which cannot be re-engaged without power-cycling the vehicle), it could lead to a crash as the driver is not expecting to use the brake pedal. In a moment's notice situation, it could be deadly. The vehicle has not been inspected, however, this problem has been reported by many other Mustang Mach-E owners. I will link my forum post at the end of this report which has other claims of this fault. The vehicle is available for inspection upon request. It cannot be easily reproduced as it is entirely random. Yesterday (11/8/2023 @ 1:40 EST), I was pulling into a parking spot with concrete posts around it. This time, it happened as I was turning into the spot. I was in Whisper mode this time. I noticed the car SPED UP a bit as I was letting my foot off the accelerator, and I had to slam on the brakes. Sure enough, "Drive Mode Not Available" was up on the screen. I was about 1 inch away from this concrete post. If my reaction time was just a bit slower in hitting the brakes, the vehicle would have crashed itself, relatively outside of my control. https://www.macheforum.com/site/threads/huge-safety-issue-1pd-drive-mode-not-available.31712/

The contact owns a 2021 Ford Mustang Mach E. The contact stated that while driving slowly in reverse and reversing of a parking space, the vehicle suddenly experienced unintended acceleration and erroneously drove across the street before crashing into an apartment building wall. During the crash, the driver sustained a lower back injury and left arm laceration which required medical treatment. The vehicle was towed to a local body shop. No police report was taken. The cause of the failure was not determined. The manufacturer was notified of the failure. The local dealer was not contacted. The failure mileage was 14,750.

Mileage: 14,750

The front camera system has failed. The cables need replacing, which was diagnosed by a Ford dealer. I have no collision assist, no cruise control, no lane keeping abilities, nothing that has to do with the camera in front. This is a known problem that Ford is not admitting to. All years of the Mach-E are having this issue, frequently. It has put myself and others on the road in danger by not being able to function as it should. Every time I turn the car on I get multiple warnings on the dash concerning these issues. This is not the only problem and safety issue I've had with this car in less than 9 months of owning it. Something must be done to hold Ford accountable.

I had my 2021 Mustang Mach-E updated with the recall software last year. In July of 2022, my High Voltage Battery Junction Box (HVBJB) still failed, giving me a service vehicle soon and SEVERELY reducing power WHILE driving. I was on the freeway and my car just started reducing speed since I was trying to pass someone and I almost hit them. I received the new HVBJB from my dealer and had been fine since. Then a couple of weeks ago, I received the errors AGAIN with this "new and improved" HVBJB that Ford said is more robust and not supposed to fail. Same thing, on the same freeway I commute (73 toll road in California). I was passing someone and the car hit me with all these errors and SIGNIFICANTLY reduced my power. Like 66% reduction. I had to get back into my lane and was able to get back a safe speed but you basically have no power to pass. This is unacceptable. I received the "new" part and yet get a failure AGAIN? On a normal commute, not at the track, accelerating to show off the EV acceleration, just DRIVING! Please make them fix this for real. My dealer said there was a new bulletin that came out after my first repair that has an updated part number, but it is not a true revised part, meaning the internals are actually differnt, it is more a housekeeping part number update due to something as simple as the sticker being in a different spot, some backend thing, etc. There has been no revision to the components that fail since they "fixed" the part back in 2022.

Erratic behavior when semi-autonomous Blue Cruise engaged. Fault may be due to failures/malfunctions in side view mirror camera modules.

All of the advanced safety features have stopped working in my Mach E The curse control does not work either the adaptive or the standard. The pre-collision system is not working, lane assit is not working. The absence of these working systems is a danger. Ford knows about this software problem with the software, however they refuse to fix the problem at there expense. The Mach E was designed from the ground up as software driven, the manufacture should be responsible to ensure that the software is up to date.

Unintended acceleration from a stop when pushing accelerator. Has happened 2 times in the last 2 days. I touched the throttle from a stop 2 time and it took off like I put the accelerator to full throttle (which I didn’t). Very dangerous situation in parking lots or around pedestrians. I have scheduled an apt with my local dealer.

The car shows front camera fault disabling all collision safety features as well as cruise control.

Front Camera Fault & Pre-Collision Assist Not Available Error messages since August 2022 around the time after a recall for windshield reglue.

* On October 16th, 2022, at about 7:00 pm, I was driving my 2021 Ford Mach-E GT when we began to change lanes (we were in the left lane heading East) as the vehicle in front of us slowed down to make a left-hand turn. There was a car behind us and two vehicles in the right lane (two-lane road in each direction) that were a few car lengths behind us as we began to change into that lane. When I turned on my signal and turned the steering wheel, I pressed the gas pedal to accelerate to get around the car in front of me to keep my distance from the vehicles in the lane I was transitioning into. Unfortunately, when I pressed the gas pedal, we experienced complete vehicle failure. I had no steering, brakes, or acceleration. Within a short time (30-45 minutes), we had no power as the lights on the vehicle, and all electrically powered devices and components were entirely out. This made it very difficult to tow the car as it is all-wheel drive, and we could not put it in Neutral to pull the vehicle. As this happened, five cars were in the area, and several had to swerve and fly off the road onto the dirt shoulder. We barely missed the car in front of us, and the car behind us had to lock up its breaks not to hit us. Our car gradually slowed down and cost off the road about 50 yards or so after losing power, as it was very difficult to get the vehicle to steer; it took everything I had to turn the wheel to get it off the road. We put on the emergency blinkers, but the vehicle lights flashed erratically inside and outside the car. We had over a dozen warnings flash on our dashboard about vehicle failure. The speakers in the car were making a thumping sound on their own as the car was flashing headlights, brake lights, and flashers on their own and very sporadically. It was like a disco club in the car as all the lights were flashing on and of at a rapid rate. The other cars stoppe and were very angry at us as the screamed at us that we almost caused an accident.

I keep receiving a fault for the front camera which seems to be a very common occurrence amongst Mach-e owners lately. After receiving this message, the cruise control abruptly kicks off. All functions of the cruise control do not work in this instance…adaptive, speed keeping, lane control, etc. This fault happens about once every couple of minutes while driving. When I’m using cruise control in ‘one-pedal’ drive mode and this fault occurs, the vehicle immediately starts braking. This happened one time as I was entering a narrow bridge in Solomons, MD, and a car behind me nearly rear ended me.

The contact owns a 2021 Ford Mustang Mach-E. The contact stated that while her husband was driving slowly into the garage and the vehicle suddenly experienced unintended acceleration and crashed into the home and went through to the bedroom, causing damages to the vehicle and the home. No warning lights were illuminated. The vehicle was taken to a local dealer for an unrelated recall repair and the contact made the mechanic aware of the failure. The mechanic confirmed that there was no related recall on the VIN. The vehicle was not diagnosed. The contact was concerned about the safety of driving the vehicle and was referred to the manufacturer for guidance. The contact filed a claim with the insurance provider and the vehicle, and the home was repaired. The manufacturer was made aware of the failure and a case number was provided. The approximate failure mileage was 2,335.

Mileage: 2,335

The contact owns a 2021 Ford Mustang Mach-E. The contact stated that while her mom was driving, the vehicle accelerated without warning. The electrical system was inoperable. While the contact was driving at low speed in a parking lot approaching a stop sign, the vehicle accelerated. The brake pedal was applied but the vehicle continued to drive and crashed into a Toyota 4 Runner. The air bag deployed and impacted the driver in the face and she sustained knee injuries and cuts on her stomach and blood in her stool. A police report was filed. There were no reported fires. The vehicle was towed to an independent collision center. The vehicle was taken previously to the local dealer where the hardware was updated and a reboot was completed. The vehicle was repaired but the failure persisted. The manufacturer was not contacted. The failure mileage was unknown. The VIN was not available.

The HVBJB subassembly in ALL Ford Mach-e vehicles has known defects with 'under-designed' main contactors that are known to fail under normal charging and driving conditions as outlined in current open Ford recall notice for my vehicle 22s41. Unfortunately, the internal damage to contactors is not visible externally, and warning notices on display only after damage has occurred, and can result in sudden loss of propulsion power at highway speed, loss of power steering, and power brakes... and failure of other 12v systems due to failure to charge the 12v battery properly after contactors are damaged. Less catastrophic results can include failure to start; which can 'strand' driver's and passengers in remote areas, bad weather conditions, as well as cause loss of use for weeks due to delays in replacement parts and local Dealerships needing equipment and training to effect removal/replacement of faulty unit with a new HVBJB having re-designed 'beefier' components.​ ​ My complaint is that Ford's recall notice 22s41 is a software-only attempt to prevent future damage, and does not require removal of the part(s) which are KNOWN TO FAIL to be replaced with the re-designed components which are available, and have been used to repair failures under warranty. I have no way of inspecting the original equipment to evaluate current condition; and failure can result in sudden and unexpected loss of power, steering, and braking as well as potentially 'stranding me' in unsafe conditions unable to re-start my vehicle.​ ​ I would like to see NHTSA strengthen the Ford recall to include both improved software AND removal/replacement of the HVBJB sub-assembly with the new 'beefier' parts.

When placed in drive the car takes off on its own without the acceleration pedal being touched. The passenger locks only work with key fob unlock button being pressed and the passenger side doesn't recognize the Fob for easy entry. The adaptive cruise control warning comes on constantly. The handas free parking never worked since i got the car in July 2021.

The contact owns a 2021 Ford Mach-E. The contact stated while reversing from his driveway, he shifted into drive and depressed the accelerator pedal. However, the vehicle accelerated at high speed independently. There was no warning light illuminated. The contact continued to drive. The contact stated that the failure reoccurred the following day. The contact stated while his wife was exiting the carwash and making a left turn with a passenger in the front passenger seat, she shifted from neutral into drive and depressed the accelerator pedal. The vehicle accelerated at high speed independently and crashed into the block wall. The air bags deployed. The contact's wife sought medical assistance and was informed that she had sustained a fractured rib on the left side of her body, pain on the shoulders, and pain in the rib cage. The passenger occupying the front passenger's seat sustained pain all over her body and a bruised rib and she sought medical assistance. A police report was filed. The vehicle was towed to a tow lot where it was totaled. The dealer was not notified of the failure. The manufacturer was notified of the failure. The contact became aware of NHTSA Campaign Number: 22V333000 (Vehicle Speed Control, Power Train), which he associated with the failure. The failure mileage was approximately 18,000.

Mileage: 18,000

On approximately March 20, 2022, I was driving my Mach E vehicle. I pulled into a driveway and parked my vehicle. Upon exiting my vehicle, my vehicle began accelerating forward up the inclined driveway. It then struck a parked vehicle and came to a stop. The car accelerated uninetentionally which is in alignment with the current recall. Additionally, the advanced emergency braking did not work as the brakes did not deploy and the car only went back to rest after I re-entered the car post-accident.

While driving around a curve, my car lost all power and went completely dark. I didn't have brakes, steering, lights or any other functions. My car was completely bricked. This happened before daylight and I didn't have emergency flashers to notify other drivers I was stopped on the side of the road. After waiting for 6 hours for a tow truck, I went and tried to find the problem myself. I found a loose connection. It was the main power feed supplying the fuse box. Once I tightened it up, I was able to start and drive the car. I've attached a picture of the connection I tightened.

AS I WAS DRIVING DOWN THE ROAD (IN MOTION / CITY STREET) AT 30 MILES PER HOUR IN MY BRAND NEW (4 WEEK OLD / 2200 MILES) ALL ELECTRIC FORD MACH E, THE DISPLAY FLASHED MULTIPLE WARNING LIGHTS THAT CAME TOO QUICKLY TO DECIPHER, AND THEN THE CAR WENT DEAD. I WAS ABLE TO PULL OFF THE ROAD AND COME TO A STOP. AT THIS POINT THE CAR WAS COMPLETELY DEAD. EVEN THE HAZARD LIGHTS WOULDN'T WORK WHICH MADE THE SITUATION DANGEROUS SINCE THE CARS BEHIND ME COULD NOT TELL THAT THERE WAS A PROBLEM.

Mileage: 2,200