SSM 51705 - Repeat Powertrain Malfunction After HVBJB Replacement

[heisnuts]

Right, I know. You're missing my point. It can still be software if they don't physically have a contactor stuck open or closed. If your car is still working, it's not likely that. The software can be compensating for something that it doesn't need to be compensating for anymore since it's a beefier part.

You might be right, but I still have my suspicions. I guess we will see. If they diagnose this current failure as a false positive and update my software, we will see if I am being towed back to the dealer with a bricked car. I would be willing to place a bet I will, but I guess time will tell.

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[Neil4Real]

You might be right, but I still have my suspicions. I guess we will see. If they diagnose this current failure as a false positive and update my software, we will see if I am being towed back to the dealer with a bricked car. I would be willing to place a bet I will, but I guess time will tell.

I am erring on the side that Ford is seeing these as false positives. It really has to be, there is no way they'd do this and then allow cars to still get SSN from the HVBJB. I guess there is a chance a strong majority are false positives and there will still be a small subset of people, of an already small group that have had SVS with the new part, that would actually need another HVBJB and get SSN. But it would make no sense, that would mean these cars are not covered by the recall if they still get SSN.

 

[Logal727]

You might be right, but I still have my suspicions. I guess we will see. If they diagnose this current failure as a false positive and update my software, we will see if I am being towed back to the dealer with a bricked car. I would be willing to place a bet I will, but I guess time will tell.

Definitely hope it doesn't come to that!

 

[AKgrampy]

You might be right, but I still have my suspicions. I guess we will see. If they diagnose this current failure as a false positive and update my software, we will see if I am being towed back to the dealer with a bricked car. I would be willing to place a bet I will, but I guess time will tell.

Hopefully it resets the faults and perhaps tightens the tolerances and if your HVBJB is going to fail you will still get the warning. Sorry that you are the Guinea Pig in this case. Personally still waiting on my first failure.

 

[MellowJohnny]

I was actually surprised that the e-Transit was covered - means some have had failures as well?

Unrelated, but I'd like to see @heisnuts take a van out for "drive"

I'm having flashbacks...

 

[dj_stang]

I wonder if this came out due to my MME. My latest HVBJB was replaced 2 weeks ago (and 1,700 miles ago) with a reman part and then Saturday the SVS & SSN messages came up with the P0AA1 code. After cycling the key about 5 times I was able to get it to power up and the SSN went away but the SVS remains. It is back at the dealer now for diagnosis. I guess time will tell.....

Mine as well. Posted in another thread but my 23 GTPE got a P0ADA code last week and it’s been at the dealer since.

 

[HuntingPudel]

I was actually surprised that the e-Transit was covered - means some have had failures as well?

Unrelated, but I'd like to see @heisnuts take a van out for "drive"

I'm having flashbacks...

LOL when someone mentions a van, I either flash back to Fast Times at Ridgemont High or to The A-Team. “A cool bud, a tasty wave, and I’m fine.” ??

 

[bigredx86]

You might be right, but I still have my suspicions. I guess we will see. If they diagnose this current failure as a false positive and update my software, we will see if I am being towed back to the dealer with a bricked car. I would be willing to place a bet I will, but I guess time will tell.

Real MVP here! I am sure a ton of people would of probably bailed out by now but I am glad your sticking with it as I am sure everyone here is interested in the long term.

I was almost wondering if your car didn't have a calibration for the new HVBJB then I realized part of the bulletin is to update the software. Hoping they found some are over sensitive and thats it.

 

[dtbaker61]

SSM 51705 2021-2023 Mustang Mach-E, 2022-2023 E-Transit - Illuminated Powertrain Malfunction (Wrench) Indicator With Various DTCs Stored In The BECM

Some 2021-2023 Mustang Mach-E and 2022-2023 E-Transit vehicles may exhibit an illuminated powertrain malfunction (wrench) indicator with diagnostic trouble codes (DTC) P0ADA, P0ADE, P0AA1, and/or P0AA4 stored in the battery energy control module (BECM) after high voltage battery junction box (HVBJB) replacement. Vehicle may also exhibit reduced powertrain performance and/or a Stop Safely Now message displayed in the instrument panel cluster (IPC) and/or High-Voltage Battery Warning message in the FordPass application. This may be due to the BECM software. To correct the condition, download and run the BECM - Reset Diagnostic Trouble Code (DTC) Occurrence Counter application in Ford Diagnosis and Repair System (FDRS). If the concern persists, refer to Workshop Manual (WSM), Section 414-03A for normal diagnostics.

----End SSM----

Not sure how I feel about this, running the application likely changes the configuration in the BECM to reduce or disable sensitivity to excessive contactor voltage drop that triggers SVS. A small subset of owners have experienced multiple HVBJB replacements after getting the new part. It's unknown to us whether these subsequent powertrain malfunctions of the new part were false alarms or indicative of actual repeat failure.

I don't like that the SSM omits mention of the HVBJB replacement date, if it was replaced before around late July 2022 it is still the old part that is prone to failure and definitely needs to get replaced the next time SVS pops up.

or, this could be Ford's way of saying 'some of the dealers forgot to reset and update software after replacing your HVBJB'.

 

[heisnuts]

Real MVP here! I am sure a ton of people would of probably bailed out by now but I am glad your sticking with it as I am sure everyone here is interested in the long term.

I was almost wondering if your car didn't have a calibration for the new HVBJB then I realized part of the bulletin is to update the software. Hoping they found some are over sensitive and thats it.

My wife is definitely in the would have bailed crowd. She has banned the car from any road trips, which I understand.

I look at it as I really like the car and there really isn’t another EV out currently I like more. Every time I am put back into an ICE car I realize just how much I love the EV precision, performance and crazy cheap fill ups overnight at the house.

I also hope I am providing a lot of data for Ford that they would not really be able to get from the masses. That is why I have agreed to allow the, to install a “token” as they call it that gives them live connection to the car and data recording capabilities. That install should be happening on this visit as they decide how to proceed. Like a lot of others here, I really do want Ford to figure this out and without people willing to volunteer it will take them a lot longer to do so.

I would be very surprised if the car was not fully updated two weeks ago when they installed the remanufactured HVBJB. The tech who has installed the last 2 now is VERY detailed and I have been extremely impressed with his attention to detail and knowledge of the Mach E. He is also open to me letting him know what I am seeing here, which is pretty rare in the dealership world.

It will be interesting to see what they decide to do this time. I know the tech has reached out to engineering again so I am sure this new SSM has been discussed. Should the decision be to just apply an update I will go with it, but I will have a strong suspicion that decision will either bring me back with another SVS light or put me on a tow truck with a SSN message in the near future. The reason I think this is because when I had new updated HVBJBs installed they would last anywhere from 5,000 to 8,000 miles before the SVS message would reappear. This was the first remanufactured HVBJB installed and 1,700 miles later I had the SVS message. I realize it is a little premature to say since I don’t have the current diagnosis from this SVS, but it did throw the P0AA1 code that is part of the service bulletin for the imminent HVBJB failure.

 

[Mike G]

And then there are people like me who got the SSN and SVS and FP warnings while sitting in the driveway doing door module updates with FDRS and have never had the HVJB replaced. This has happened more than once (along with the number of times those pesky door modules have been updated). No idea what the correlation is there.

 

[Mike G]

BTW here's the tool in FDRS:

 

[silverelan]

Well, actually 4 replacements, but who's counting? The first replacement was before the software and updated parts (and that was the one time the car bricked and had to be towed). The next 3 were the updated parts and software. The nice thing with the software is it gives the warning ahead of time so you can still drive the car. Without that warning from the software the contactors will weld together (or apart), and that can result in a bricked car that will not move.

A remanufactured part is one where the manufacture takes a failed part and rebuilds it replacing all the "parts" that make up that component. It usually means they reuse the shell and replace the parts inside.

5 HVBJBs is an indication that it’s flawed hardware. It’s amazing to me that Ford keeps throwing the same garbage parts at it and is okay with $2000 warranty claims.

I’m glad you are burning through these things. Keep up the great work so maybe we all can get a permanent solution.

 

[leeman]

This is sad to hear I have a GT that I've had to replace once although it wasn't terribly painful and thankfully I had auto club towing service which is much better than anything Ford would ever offer with a roadside assistance. Got to the dealership within 20 minutes headed for days late but they didn't pay for a rental car anything like that unfortunately. That's why I renamed the vehicle my expensive golf cart.

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