😭😭😭 POST BATTERY CONTACTOR RECALL -- FIRST JUNCTION BOX FAILURE 😭😭😭😭

[AKgrampy]

Ummm, you know that paints a super inaccurate picture. It's not 0.0 percent of people have had issues with the car. Conservative estimates is 0.5 for HVJB alone.

He, I believe, was just pointing out that you just can’t go by forum threads. Some will make it seem like a larger problem percentage wise that in is and some, like the no-problem thread, make the issue seem smaller.

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[generaltso]

Maybe I should go unbridled Extend on a track and see if we get the Service soon/now message.

Doesn't Unbridled Extend actually reduce the power to prevent it from getting as hot?

 

[Av8tor]

Doesn't Unbridled Extend actually reduce the power to prevent it from getting as hot?

Wisper too, not a lot of regen. Smooth costing

 

[Neil4Real]

Doesn't Unbridled Extend actually reduce the power to prevent it from getting as hot?

Yeah, it also stops brake regen, which I think might be contributing to the heat build up?

 

[generaltso]

Yeah, it also stops brake regen, which I think might be contributing to the heat build up?

Yeah, so if the goal is to force a HVBJB contactor weld event, I don't think Unbridled Extend is the optimal drive mode.

 

[Fairleighs]

It has already been confirmed it was a server side error that pulled the recall.

As discussed at length on a billion different threads, GT/GTPEs are certainly going to have a higher incidence rate due to their inherently higher power draw. Mine is one of the cars that failed just a few days after the update. There is plenty of info about this, so it'll just be up to you if you want to just keep driving the car as is, or get the software update and get an earlier failure without being stranded and get the part replaced sooner than later.

I concur with @Neil4Real....I too have a GT that failed two days after the software patch. Dealer confirmed it is the HVBJB. I drove the car really hard post update to see if there was less performance. There was no loss of performance and the fail happened a day after hammering it when my wife passed someone on the way to work. I asked her what speed she was at when passing, she replied "I floored it and realized I was doing 90mph." I chastised her for speeding. BL: Drive the car as it was designed, make it fail, make the dealer fix the fail. Ford has too much to lose with this vehicle not succeeding in the market. No offense, but I get anxiety running into a gunfight, not driving my Mach E. Those who think Ford is sitting back and laughing at its customers.... clearly don' t have a grasp on the impact of not fixing the past, current, and future issues with the Mach E. My .02

 

[babgvant]

Yeah, it also stops brake regen, which I think might be contributing to the heat build up?

I was recently playing around with UE and when I took my foot off the go pedal, the power indicator indicated a small amount of regen. The car did slow down a little, and didn't seem to be coasting like it does in Whisper. I didn't mess with it a ton though.

 

[ARK]

Yeah, it also stops brake regen, which I think might be contributing to the heat build up?

To the extent it reduces regen to engage or whisper-like levels, you'd still get regen every time you pressed the brake pedal because the Mach-E has blended braking.

I suppose it's possible blended braking gets disabled with Unbridled Extend, but I have not heard about that before and it would seem to go contrary to what the purpose of Unbridled Regen is (make the car last longer while on a track) - no regen braking would mean quicker depletion of the battery.

The other thing that would surprise me about disabling blended braking would be that as a performance-oriented mode, losing blended braking would mean substantially reducing the total braking power of the Mach-E, which cuts against them doing that.

 

[GoGoGadgetMachE]

To the extent it reduces regen to engage or whisper-like levels, you'd still get regen every time you pressed the brake pedal because the Mach-E has blended braking.

I suppose it's possible blended braking gets disabled with Unbridled Extend, but I have not heard about that before and it would seem to go contrary to what the purpose of Unbridled Regen is (make the car last longer while on a track) - no regen braking would mean quicker depletion of the battery.

The other thing that would surprise me about disabling blended braking would be that as a performance-oriented mode, losing blended braking would mean substantially reducing the total braking power of the Mach-E, which cuts against them doing that.

Tom M. and others have stated that it's not disabled, but is reduced in that mode:

2021 Ford Mustang Mach-E GT First Drive: More Smiles Per Mile (insideevs.com)

That's also on the official Ford explanation page:

Mustang Mach-E GT Unbridled Extend Drive Mode FAQs (ford.com)

​

What does the Unbridled Extend drive mode change on the Mustang Mach-E GT Performance Edition?
The Unbridled Extend mode was developed for the maximum amount of fun-to-drive on a small track or autocross course. Changes include:​

​

• More linear pedal mapping for both accelerator and brake
• Battery proactively cooled and power controlled for continuous, repeatable lap times
• All-wheel drive (AWD) system modified with a unique front/rear bias
• Stability and traction control modified to be less intrusive
• Amplified powertrain sound, audible even during idle
• Reduced levels of regenerative braking
• Disabled driver-assist features such as lane-keeping and cruise control

(emphasis mine)

 

[Shayne]

Like the low voltage battery issue at the Mach-E launch. At the end of the day, what percentage of people actually got hit by it? It was quite low, and then they found the fix, and we never heard about it again.

Think you are right about panic. Second summer and still going.

Only stranded me once with a dead 12V, same as it did at the launch if you remember, it hit again the second fall/winter when it got cold again and parked (after 2 dcfc but only 50 KW chargers). Booted after 12V charging but not sure if that is fixed. Does not appear so to me and hit me a number of times. No software fix here that worked and others suffered the same fate. The third time they are trying a new HVJB and a BECM. I have been informed that the third fix is the fix. Winter will tell if the new A part HVJB is the fix. You have now heard about it again and from numerous others over the winter.

 

[agoldman]

Drag race with a patched and non patched Gt, and see who throws the fault first..

 

[Shayne]

Drag race with a patched and non patched Gt, and see who throws the fault first..

What you think you own a mustang or something ? There's the sprit. If it is not going to hurt you lets blow sh!t up ?. Drive it like you stole it it is under warranty for 8 years. Pretty sure if it is going to go it should by then. The only reason to pamper it is to wait for the H part number. Nah

 

[Fairleighs]

Update as of 9July2022:

Shout out to Cooper Ford in Carthage NC, they are a small EV dealer in my area and their customer service is top notch. They gave me a loaner off the lot while they fix our MME GT. The service manager informed me the HVBJB part number has changed no less than six times and the current part number to replace the HVBJB is not on backorder. This was after the VOR (emergency) request to Ford to get the before mentioned HVBJB. Looks like Ford is trying to fix the problem in affected cars. Hopefully @scoopman's car stands the test and is the example of an actual fix......MTF.

Update as of 13JULY2022:
Dealer called and stated HVBJB repair will be complete by Friday. Ford emailed me confirming same (thanks @Gimme_my_MME for advice on opening up a case with Ford). I'll wait and see, if fixed by this Friday would mean a total of 8 days from fail to fix. I live in rural North Carolina.

 

[EV Lab]

I just got this same fault last night, after the car was already turned off. Does anyone know how to get the car into neutral with this fault? It currently won't let me select and drive mode or N.

 

[Gimme_my_MME]

I just got this same fault last night, after the car was already turned off. Does anyone know how to get the car into neutral with this fault? It currently won't let me select and drive mode or N.

If you have 12v power then go into sync settings and vehicle and emergency tow

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