DTC U0129, automatic transmission not working properly

CTORRES

MEMBER
2016 TOYOTA COROLLA
1.8L
4 CYL
2WD
AUTOMATIC
21,700 MILES

Hello dear friends, after a couple months saving money finally bought a scanner MaxiCOMmk808. I scan my car and found some DTC and I would like to help me to repair my car. I want to show you DTC and follow your instructions step by step. I can’t move the car because it's hard to operate the gear shift and it sounds like click. It’s difficult look on the video but when put the gear shift lever P to D or R the car moves very abruptly. Morning. I was thinking and I have a idea. What do you think if we start the troubleshooting with the DTC U0129. Regards from Panam City.

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3 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,536 POSTS

U0129 - Lost Communication With Brake System Control Module. I would start by checking all fuses and if okay let's replace the ABS control module. here is a guide to help check the fuses and the instructions below so you can change the control module out:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.

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Monday, June 28th, 2021 AT 9:01 AM

CTORRES

MEMBER
59 POSTS

Mr. Ken, it’s a pleasure see you again thanks for your time and experience. I was checking the 2 fuses in the engine room relay block and are ok. I was watching some videos on website and I would like to check the wiring diagram on the plug brake system control module (BSCM) grounds and positives. I know you are the expert but I would like to check that part. I forgot to tell you a part of the engine was under water.
Take care.
CTORRES from Panam� city.

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Monday, June 28th, 2021 AT 5:50 PM

KEN L

MASTER CERTIFIED MECHANIC
47,536 POSTS

Here is a guid to help you check the wiring connection and the transmission wiring diagrams below:

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (below). Please let us know what you find.

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