2019 Bullitt Trans and codes

[K1514]

I need some help before I trade this car in.
Late last year I stated getting multiple warnings on my dash one after another after another. I get "service advancetrac" "cross traffic system fault", "Blind spot system fault" park aid fault" "see manual" with a wrench pic. I also get driving modes unavailable and a few others. I was at 35,000 miles, needed a clutch and intake, so I took care of those issues hoping it would clear up my other issues. 2 months after a new clutch and manifold I am still fighting the warnings and occasional MIL.
Codes are P1934 Vehicle Speed signal
U0121 Lost communication with ABS control module
U0212, LOst communication with steering column control module
U1012 Invalid internal control module monitoring data received from ABS system

I can clear the codes but they come back. I have tried changing the rear ABS sensors and the multi-pin sensor on the transmission with no luck. It seems to happen most when I make a u turn or hard turn and accelerate.

All help much appreciated.

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[Goterr0r]

It could be a bad wheel bearing causing the codes. It's happened to a few people on here.

While a bad wheel bearing on a Mustang won't directly trigger specific diagnostic trouble codes (DTCs), it can indirectly cause ABS (Anti-lock Braking System) or speed sensor codes

 

[ORRadtech]

Have you ever put it on a scan tool with live data? You need to do some methodical troubleshooting.
Clearing codes and throwing parts seldom solves problems

 

[K1514]

Have you ever put it on a scan tool with live data? You need to do some methodical troubleshooting.
Clearing codes and throwing parts seldom solves problems

I understand your point but what live data would I monitor on something like this ? Wheel speed? I have the tools to monitor, all advice appreciated.

 

[ORRadtech]

Yes, I'd monitor wheel speed sensors. I'd also monitor the ABS and its communication. Check the network architecture for clues to what is pulling what down. I don't claim to be even mediocre with CANBUS and LINBUS systems but tracking what's going on could narrow the search.
You wrote that it triggers on a U turn and acceleration. That could certainly point to a wheel bearing messing with a sensor as someone suggested. Or it could be a wiring harness stretching and/or grounding out.

 

[K1514²]

I understand your point but what live data would I monitor on something like this ? Wheel speed? I have the tools to monitor, all advice appreciated.

K1514, what all did you end up doing to the car? I just bought her the other day and within a day of owning made a hard left to get on interstate and she lit up like a Christmas tree. Think I have it resolved now but time will tell

 

[NGOT8R]

Have you tried cleaning the ABS sensor rings? Mine got gunked up and threw Speed Restricted codes. I used brake and parts cleaner and a shop rag to clean them and all has been good ever since.

 

[K1514²]

Have you tried cleaning the ABS sensor rings? Mine got gunked up and threw Speed Restricted codes. I used brake and parts cleaner and a shop rag to clean them and all has been good ever since.

Battery cable was loose.. tightened up and have been driving hard to try to duplicate and no issue yet. Had previously gone off anytime make hard turn. Also fixed the exhaust mode issue... just a stuck actuator

 

[K1514]

Did everything on this post except the rear wheel bearings. Checked every connection and wire without luck. Got tired of trying to fix it. Car has a new intake manifold (broken IMRC), McLeod clutch and an E85 tune by Oz tuning. Never ran E85, only 93. (at least it did)

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