Way too DANGEROUS!

[Duncs]

A few notes.

1) I strongly suspect NHTSA will take this very seriously. Toyota got in serious hot water for an issue with ... Prius? .... braking. In those cases, I think the car went into full accellerate mode with the break pedal applied. OTOH, Tesla got in only moderate stink for the opposite problem of having the break apply when steaming down a freeway at 65mph. They pushed a fix in about two weeks. I hope NHTSA takes this seriously too - but the fact that it continues braking, "just" falls back to 1PD, it continues braking just at different, surprising, and unsafe rate, which can be described to customers.... we'll see I guess.

2) You say this is caused by the HVBJB update -the comms from your service department are a bit more vague - "and software updates". While it's all the same to you, someone else might get this software update outside of HVBJB and be effected, by my reading.

3) You say "there isn't anything Ford can do". I read the service statement differently. There's nothing Ford can do *NOW*. It's not clear they know there is nothing they can *ever* do. They could be working on it and push a fix - if software broke it, software perhaps can fix it.

4) On a personal basis, My MachE has internal communication faults. They are generally in the camera sensor systems. This makes blue cruise, lane keep assist, cruise control generally, not very reliable. My experience is that about every 30ish minutes of freeway driving I get a fault. The car throws a bunch of "lane centering not available", or "front facing camera fault", or "driver facing camera fault" dialogs, and turns off those functions, then about 10 seconds later, they are all good again. The codes relate to packet corruption on the internal CANBUS links. I did the trick of unkinking the one coax by the driver pointing camera, didn't seem to help. I brought the car in twice. Once I was given a .... "story"..... about how a leaf in front of the sensor can cause this failure. Sure, a leaf can perhaps confuse the lane keeper, but, sorry, it takes a very strange leaf to cause packet corruption in the car. Service was advised by Ford to ignore this class of error codes, I have the comms from service / ford. They do state over and over in the manual and on screen that the driver must stay aware of, and respond rapidly, to failures of these automated systems. And I do. The car does stay stable and pointed in the right direction, and is noisy about alerts and recovers fast, so there is certainly an argument this is not a safety issue like your report is. The driver does have time to react. I've given up trying to get a solution, but I have to say I'm not crazy about this (consistant) failure mode and Ford / my dealer's response.

How do we know if the NHTSA is even aware of the problem?

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[bbulkow]

How do we know if the NHTSA is even aware of the problem?

I don't know about "we", but "I" do not.

Oh, but look, NHTSA has a page on reporting. https://www.nhtsa.gov/report-a-safety-problem

If you file the report, then I think we could agree they are aware, then we can move on to hoping they take the issue seriously.

 

[RMoore]

It's a terrifying experience thinking you are about to slow but suddenly you're going faster.

Not doubting that 1PD no longer works, and sorry you are dealing with this, but can you clarify something--is it that the car no longer slows down with 1PD or is it actually accelerating too even with your foot off the accelerator pedal?

 

[Duncs]

Not doubting that 1PD no longer works, and sorry you are dealing with this, but can you clarify something--is it that the car no longer slows down with 1PD or is it actually accelerating too even with your foot off the accelerator pedal?

It's just the one-pedal brake failure. But when it goes, and the momentum of the car reengages forward, the speed increases from what it was and certainly should be.

 

[Blue highway]

"As communicated to me by my dealer, ford is aware that the HVBJB recall causes one-pedal drive faults and they do not have a solution."

nonsense

 

[RMoore]

It's just the one-pedal brake failure. But when it goes, and the momentum of the car reengages forward, the speed increases from what it was and certainly should be.

I wonder if it only feels like the speed increases. If you take your foot off the accelerator, the car should no longer be accelerating and would then travel at constant velocity in the absence of friction and wind resistance. In reality it should slow a bit because of those factors. Was your foot completely off the accelerator?

 

[EELinneman]

CUSTOMER STATES WARING FOR ONE PEDAL PERFORMANCE MESSAGE
COMES ON WHILE DRIVING AND VEHICLE GOES BACK TO NORMAL
BRAKING SEE FAULT CODES IN SYSTEM
PERFORM DIAGNOSIS AND CHECK FOR CODES FOUND CODES STORED FOR
LOSS OF COMMUNICATION WITH ABS MODULE AND LOSS OFF
COMMUNICATION WITH IMAGE PROCESSING MODULE CONTACTED FORD
TECH HOTLINE FOR ASSISTANCE
COMMUNICATION RECEIVED FROM FORD TECH HOTLINE AS FOLLOWS,
ENGINEERING IS AWARE OF THIS SOFTWARE ISSUE AFTER PERFORMING
RECENT SOFTWARE UPDATES INCLUDED IN HVBJB RECALL. CONCERN IS
STILL BEING ADDRESSED WITH THE FACTORY ENGINEERING DEPT

The only thing missing in Fordspeak is the dreaded "soon". This is clearly a safety issue. Consider that, but since this is going to affect thousands of cars, perhaps Ford or a customer should let the Feds know about this.

 

[MellowJohnny]

The entire regen / physical braking system is "fly-by-wire" - it's all controlled by software. The brake pedal is basically a dimmer switch.

Software will fix it, and I'm sure Ford is taking it seriously.

At least there is an easy workaround for now, but drivers need to be aware sooner rather than later.

 

[Mach-e4x]

My MME has had exactly the same problem since the HVBJB recall.

Mine too.

 

[Duncs]

Mine too.

Please report it!

 

[Mach-e4x]

I wonder if it only feels like the speed increases. If you take your foot off the accelerator, the car should no longer be accelerating and would then travel at constant velocity in the absence of friction and wind resistance. In reality it should slow a bit because of those factors. Was your foot completely off the accelerator?

When 1-pedal fails with my car it's always when going under 30mph and there is a warning and audio on the center screen that alerts you that it is off.
The next time the car is started 1-pedal comes back on.

 

[Duncs]

When 1-pedal fails with my car it's always when going under 30mph and there is a warning and audio on the center screen that alerts you that it is off.
The next time the car is started 1-pedal comes back on.

Does it happen to you often?

 

[DYohn]

Use four brake pedal problem solved.

 

[Mirak]

Imagine driving down the road. You pull off the accelerator on your Mach E to slow down and eventually brake. It works. As you creep closer to the stopped car in front of you, your mach e continues to slow until OUT OF NOWHERE your one-pedal regen braking fails and your mach e -- at a time when it should be stopping -- lurches foward, throwing you into whatever is in front of you! It's scary. And Ford NEEDS to fix this known issue immediately.

After I got the HVBJB recall last month, my mach e would randomly lose the ability to slow and brake using one-pedal regen. It's a terrifying experience thinking you are about to slow but suddenly you're going faster. luckily, it hasn't resulted in an accident like the one described above. But I dont feel safe having my family drive a car that doesn't stop the way it's supposed to. I took my vehicle into the dealer three times. After updating every available module, they escalated the matter to Ford national techs. As communicated to me by my dealer, ford is aware that the HVBJB recall causes one-pedal drive faults and they do not have a solution. Yet they are posting here about available goodwill "gifts" for those who go get the recall within a certain time. Is Ford encouraging Mach e owners to get the HVBJB recall knowing that it will result in an unsafe car with a whole other problem?

I had zero issues with this vehicle before this recall. I guess the honeymoon period is over. What can I do? The dealership said there is literally nothing they can do and Ford acknowledges this. @Ford Motor Company I just want this car to work as it should and did before the recall.

As a few others have noted, a 1PD fault would not cause the car to "suddenly go faster." It might cause the car to not slow as quickly as you expect.

This is not semantics. What can cause the car to suddenly go faster is accidently engaging cruise control via brushing the "magic button" on the far-left side of the steering wheel. People do this from time to time - it has happened to me a couple of times - and if you panic instead of putting a foot on the brake, bad things can happen. I suspect this is why, on newer vehicles, such as the brand new Ford Bronco Sport I recently drove, the cruise control button has been relocated from the edge of the steering wheel to the right side of the left button cluster, a bit closer to the middle.

Now, back to 1PD faults, this has happened to me twice in the past three years of ownership. I believe Ford previously released some sort of software patch to address. I was not aware that the HVBJB recall - which I had performed just last week - was in any way to blame for a 1PD fault. That seems rather odd to me. It also seems odd that if Ford is aware of this issue, a SSM has not been issued (perhaps one will in the coming days).

At this point, I'm not gonna draw any conclusions from a phone call and some service notes. It doesn't seem likely that swapping out the HVBJB would cause 1PD fault.

UPDATE: Other people are experiencing this, and there appears to be a correlation with HVBJB replacement. Evidently software is updated as part of that recall work.

One-Pedal Driving Failure | MachEforum - Ford Mustang Mach-E News, Owners, Discussions, Community

I plan to keep using 1PD, since I keep my foot close to the brake pedal anyway. I'll see if the fault occurs. It hasn't popped up in the week since the HVBJB recall was performed.

 

[grein002]

I've submitted a report to NHTSA

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