2023 Mach 1 - Strange Electrical Issues After Battery Replacement (Odometer Reset, Etc.)

[Pines]

I have an incredibly strange problem I was hoping someone might have some feedback on.

Vehicle is a 2023 Mach 1, manual transmission, with less than 4K miles, she spends most of her life garaged. Whipple Stage 2 and supporting modifications were installed by Ford dealership after purchase. Have had a few issues with battery draining if left to sit parked for extended periods of time, so I had been driving a bit on weekends. No other problems with the vehicle otherwise since purchasing. Lots of cold weather here recently in Central TN, and a long time away from home for work means she sat garaged a bit longer than expected between starts, and wasn't on a battery tender.

Battery was completely dead the last time I went to start up, so I attempted to jump with no success. Pulled the battery and performed a recondition with my trickle charger, reinstalled...

Vehicle starts, runs and drives just fine now, but with some very peculiar electrical issues. Disconnecting and reconnecting the battery does nothing to fix the following, and I have already tried a brand new battery, as well as checking multiple PCM-related fuses and relays:

Odometer has reset to zero; not the trip odometer, the actual odometer. Currently sitting at .5 miles after a short drive.
CHECK 4X4 is showing as an error message, every time the vehicle is started.
TRANSMISSION NOT IN PARK is showing as an error message, every time the vehicle is shutoff; as mentioned above, this is not a 10-speed automatic, it's a manual transmission. This error message stays illuminated on the dash cluster indefinitely, it does not go away.

Has anyone ever heard of a similar issue? I've spent probably 7 or 8 hours researching the problem and have come up short; my concerns are that with the Whipple installed, the local dealership might give me some pushback if I take her in to have the problem diagnosed, considering the PCM has been modified. Since I've moved since the vehicle was purchased, I would not be taking her to the dealership that did the original installation.

Thanks in advance, appreciate any feedback or insight someone might have.

Sponsored

 

[Paddles]

Did you already try performing a BMS reset?

 

[Pines]

Did you already try performing a BMS reset?

Yep, BMS reset was performed as well, each time I reconnected the battery.

 

[IPOGT]

Maybe it was hacked with F-150 4X4 software. That’s weird.

 

[Pines]

Couple of other things to mention -

1 DTC was present (P061A) which was cleared. It had no effect, of course -

3 of the 4 toggle switches in the center console have no effect when pressed; only the far left toggle (hazard lights) works:

"Check 4x4" Error Message -

"Transmission Not in Park" Error Message -

Both of these pictures are with the engine off. After starting the vehicle, only the wrench icon (on the right, under the speedometer) is illuminated (no CEL).

 

[First Stang]

Seems like the software is not set up right. Did they inadvertently load an f 150 program into your Mach 1? Before I got mine, the dealer spent a whole day programming the car. Not sure how long the process is or how interchangeable they are but worth going to a dealer to check. Good luck and pls post updates.

 

[Skye]

Did they inadvertently load an f 150 program into your Mach 1?

^ This.

The BCM and PCM are programmed with the car's VIN. I'd of thought that, while a "5.0L" load could be attempted, the tech OS interface would alarm or give indications it wouldn't complete due to a vehicle incompatibility.

In a sense, it's kind of like installing a crate engine in any vehicle. A Raptor build, maybe. Somehow, until now, the BCM has been OK with that. Or maybe to complete the build, the tech flashed both BCM and PCM with that same project software.

 

[IPOGT]

Though it‘s entirely possible for that to happen, I hope I haven’t misplaced my faith in humanity by believing no one could possibly be stupid enough to actually do such a thing. I’ve come close. ;-)

 

[Pines]

Seems like the software is not set up right. Did they inadvertently load an f 150 program into your Mach 1? Before I got mine, the dealer spent a whole day programming the car. Not sure how long the process is or how interchangeable they are but worth going to a dealer to check. Good luck and pls post updates.

Just to clarify, none of the problems listed in the OP were present until after the battery died and I replaced it a few days ago. Vehicle has just under 4K miles (note the odometer in the pictures above now says .5 miles), and I have had zero issues until the battery was changed.

I found a single thread on these forums last night when I was doing some more digging on this issue -

https://www.mustang6g.com/forums/threads/transmission-not-in-park-in-manual-gt350.147639/

In this thread the OP had made some changes to the IPC that caused the "Transmission Not in Park" error in his manual GT350. Now, I haven't made any changes whatsoever to the vehicle's software myself, but it seems possible the problem lies with the IPC, considering the odometer reset and other errors.

I have an OBDLink EX cable delivering today and will pull some data with FORScan... I'm a complete noob when it comes to tuning Ford vehicles, but I have a lot of experience with other OEMs, so this is a last-ditch effort to diagnose before I take her to the local dealership.

Thanks again for the feedback from those folks who posted yesterday, it's greatly appreciated.

 

[MiamiGT350]

I can't speak to your exact problem, but I would use ForScan to execute module resets and self-tests of the IPC, etc to see what it reports back.

 

[Pines]

I can't speak to your exact problem, but I would use ForScan to execute module resets and self-tests of the IPC, etc to see what it reports back.

Appreciate it, thanks.

 

[Ramairetransam]

boy thats an odd problem to have , sounds all battery voltage related, did you replace the battery yet?

 

[Pines]

boy thats an odd problem to have , sounds all battery voltage related, did you replace the battery yet?

Yep, a brand new battery was the first thing I tried.

 

[Ramairetransam]

ugh man . i know a lot of car dont like being jump started.Did you let the vehcile sit over night with the battery disconnected, i know a kam reset should do the same thing .

Is it possible you have a rodent issue and it chewed something up , which is causing the battery drain ?

 

[Pines]

ugh man . i know a lot of car dont like being jump started.Did you let the vehcile sit over night with the battery disconnected, i know a kam reset should do the same thing .

Is it possible you have a rodent issue and it chewed something up , which is causing the battery drain ?

Vehicle sat overnight with no power connected, and I also had the positive and negative cables touching together for 30~ seconds beforehand to drain any existing power in the system, since that's an old trick I've used before on other vehicles. Neither had any effect on the issues above.

No chance of rodents, my detached garage is climate controlled and spotless since it houses some other valuable toys. The battery drain happened over the course of a few weeks, and after investigation it's not that uncommon of a problem on these newer vehicles, since they are constantly communicating / sending telemetry data to external sources. In hindsight I should have had her on a battery tender (and kept the keyfob in a Faraday pouch), mistakes I won't be making again after I solve the current problems.

Sponsored