My PowerBoost is essentially dead

[devern]

To be clear, most of the hybrid components are on a discrete, low temp cooling loop. If needed, the AC is used via a plate heat exchanger to provide additional cooling. The electric motor on the other hand is cooled via the trans fluid. From everything we've seen thus far, the transmission overheats before the emotor does. You're the first case I've heard of anything in regards to the emotor temp. Given the long list of codes previously seen, it sounds more like a GWM issue.

The IPMA programming killing the battery is due to incompetence on the tech that did the programming. He didn't use a proper power source on the 12v system. About the only thing that tells us is that they're not using the brightest lightbulb on your truck.

Yeah, I was admittedly resistant to that possibility of GWM issues in the past, since I'm reasonably certain they replaced the GWM once already... but in light of the obvious goof of not connecting external 12V to update the module, maybe I should start being more critical of the service work on the vehicle. That being said, maybe the fact that the GWM was replaced and presumably would have required programming at that time makes it even more likely they botched an update?

Maybe I will order a mongoose after all. I've seen some screenshots that imply that FDRS will show me a history of actions taken when they have been hooked up to my vehicle. Can I get this data if I buy a 2 day license even without a tool/just by entering my VIN?

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[HammaMan]

Quite a few of us have a FDRS license to pull your info. Some have access to the dealer network side of things and can pull additional info. @rugedraw can give you all of the info. No need to get access to FDRS if you don't have the cable. There's nothing there for you.

 

[rugedraw]

Yeah, I was admittedly resistant to that possibility of GWM issues in the past, since I'm reasonably certain they replaced the GWM once already... but in light of the obvious goof of not connecting external 12V to update the module, maybe I should start being more critical of the service work on the vehicle. That being said, maybe the fact that the GWM was replaced and presumably would have required programming at that time makes it even more likely they botched an update?

Maybe I will order a mongoose after all. I've seen some screenshots that imply that FDRS will show me a history of actions taken when they have been hooked up to my vehicle. Can I get this data if I buy a 2 day license even without a tool/just by entering my VIN?

I can see anything done or not done with FDRS using PTS. I just need your VIN. If they did replace your GWM, there are processes that need to be performed. At the very least, a config process would need to be run and possibly a PMI process, as well.

Never mind. I found it. Stand by while I poke around.

 

[rugedraw]

@devern I see no indication your GWM was replaced. The module they replaced in May was your IPMA. On 5/5, they tried to PMI it three times and it failed. They tried again on 5/8 and it was successful and they ran calibration procedures on all cameras. On 5/12, they did a LIN initialization procedure, but I see no indication of a GWM swap. Your truck is communicating fine with Ford, so I don't think there is anything wrong with the GWM.

I can only see 60 days worth of codes, and your truck has been very unhappy since 4/15. I can't tell exactly when these codes started, but is the first day PTS shows the significant hard codes in the system. I can only see as far as 4/12, and the codes do not show on 4/12-4/14.

 

[devern]

@devern I see no indication your GWM was replaced. The module they replaced in May was your IPMA. On 5/5, they tried to PMI it three times and it failed. They tried again on 5/8 and it was successful and they ran calibration procedures on all cameras. On 5/12, they did a LIN initialization procedure, but I see no indication of a GWM swap. Your truck is communication fine with Ford, so I don't think there is anything wrong with the GWM.

I can only see 60 days worth of codes, and your truck has been very unhappy since 4/15. I can't tell exactly when these codes started, but is the first day PTS shows the significant hard codes in the system. I can only see as far as 4/12, and the codes do not show on 4/12-4/14.

Thank you for looking. The GWM would have been replaced back in June of 2022, I think. I'm trying to find the work order, but I've moved twice since then, so it's being elusive. It's entirely possible my memory is wrong and they did something else.

I thought the TCU is what handles talking to Ford? The GWM would be required for it to be able to provide anything useful.

Just checked on it again today, under the exact same environmental conditions as yesterday and it is perfectly fine. The only differences over the past 2 days it has had issues are:

1. I have not driven it today
2. I engaged the parking brake (maybe it will trigger an OTA )

So to reproduce this, I expect it has to both be driven for enough time for the components to warm up (every example I can think of, this has been at least 45 minutes), and be warm outside.

 

[rugedraw]

Thank you for looking. The GWM would have been replaced back in June of 2022, I think. I'm trying to find the work order, but I've moved twice since then, so it's being elusive. It's entirely possible my memory is wrong and they did something else.

I thought the TCU is what handles talking to Ford? The GWM would be required for it to be able to provide anything useful.

Just checked on it again today, under the exact same environmental conditions as yesterday and it is perfectly fine. The only differences over the past 2 days it has had issues are:

1. I have not driven it today
2. I engaged the parking brake (maybe it will trigger an OTA )

So to reproduce this, I expect it has to both be driven for enough time for the components to warm up (every example I can think of, this has been at least 45 minutes), and be warm outside.

Yes, the TCU is the module that actually communicates with Ford, but none of the DTC's your truck is recording state communication issues with the TCU. It is recording communication issues with several modules, but not the TCU.

 

[devern]

Interestingly, they must have applied the most recent PCM config, because my asbuilt shows: <F188>ML3A-14C204-VGE</F188> (and the OBD tool shows this too as the PCM "Calibration ID"). Saw that version string mentioned in another thread, and it got me curious. Looks like I have quite a few modules without the newest (I mean, I knew this because of the lack of OTAs, but now I can somewhat quantify it).

 

[devern]

The IPC read 11.6V on Saturday while the issue was happening. There is an IPC OTA (2.4.3) that fixes a 12V battery drain due to the backlight (I wonder how I can confirm if this is present), which I definitely do not have. My dealer attempted CSP 22B08, but wasn't able to complete it before it ended... I really need to get this thing updated. I am almost positive the vehicle's behaviour will change when I do.

EDIT:
I have also read that AGM batteries can suffer from permanently reduced capacity if their voltage drops too much. This is why I'm so keen to experiment with replacing the aux battery.

 

[GinoM3078]

I’ve been reading all this trying to figure out if I’m having this same issue. Hopefully this video attaches. Left me and my family stranded in the middle of the intersection in TX 100 degree heat. Anyone have an issue on their 23 Tremor shifting from drive to park and won’t stay in drive? On day two and service has no clue what the problem is.

 

[Snakebitten]

I’ve been reading all this trying to figure out if I’m having this same issue. Hopefully this video attaches. Left me and my family stranded in the middle of the intersection in TX 100 degree heat. Anyone have an issue on their 23 Tremor shifting from drive to park and won’t stay in drive? On day two and service has no clue what the problem is.

Surely that is throwing some codes for some kind of hint?

There are a lot of conditions that have to be met in order for the truck to allow the transmission to engage Drive. It'd be a daunting task to track all those conditions down without at least some suspicion as a starting point. For example, a faulty door sensor could keep the truck in Park. Of course the "door open" alert would be the hint.

I assume you have the Ready light?

 

[GinoM3078]

@Snake, I don’t know. Bought it May 2, 2023 and has 2100 miles. Just went into park by itself me and my wife thought AI was taking over. Doors were closed and everything. Service called me around 5 pm, still unknown what is wrong. Ford called and said buy back process is started. 30+ years of driving this is the first time I’ve had to deal with this. Upset this is going on.

 

[devern]

Something I thought of today, that I hadn't considered for a while. The truck worked fine in the heat for the entirety of its first summer. Two major things happened between purchasing the vehicle and the first time it broke down like this on April 20th, 2022:
1. First (and only) PowerUp OTA received in December 2021
2. Dealer performed the exhaust heat exchanger recall (replaced the assembly April 14, 2022)

At the time, I was mildly suspicious of the issue starting within 1 week of item 2... I'm more suspicious now. Especially after seeing the over temp code on the electric motor

 

[GinoM3078]

Something I thought of today, that I hadn't considered for a while. The truck worked fine in the heat for the entirety of its first summer. Two major things happened between purchasing the vehicle and the first time it broke down like this on April 20th, 2022:
1. First (and only) PowerUp OTA received in December 2021
2. Dealer performed the exhaust heat exchanger recall (replaced the assembly April 14, 2022)

At the time, I was mildly suspicious of the issue starting within 1 week of item 2... I'm more suspicious now. Especially after seeing the over temp code on the electric motor

Well I promised to keep y’all updated. After a week at the dealer, still no cause for the gear shift to move to park by itself. On to week #2. To be continued.

 

[Josh35]

Wow didn’t know my thread was still an active discussion. Just a refresher, ultimately they replaced my entire wiring harness. 1 year later the truck is working perfectly since .

 

[Snakebitten]

Wow didn’t know my thread was still an active discussion. Just a refresher, ultimately they replaced my entire wiring harness. 1 year later the truck is working perfectly since .

Thanks for the update.
And yes, your thread is reaching legendary status.

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