Which cars report code U0129?

Code U0129 is named in 7 US owner complaints. Models: 7, model years 2011–2024. BMW X3, Chevrolet Malibu, Chevrolet Silverado 1500, Honda Accord Hybrid, Honda CR-V.

U0129 code: Lost Communication With Brake System Control Module A

Q: What does code U0129 mean?

Lost Communication With Brake System Control Module A. How to read U0129: the letter U means network communication between modules; the second digit 0 marks a generic SAE code shared by all makes; the last three characters 129 identify the specific fault.

Code U0129 is named in 7 US owner complaints. Models: 7, model years 2011–2024.

What the code means

Lost Communication With Brake System Control Module A. Generic meaning per SAE J2012 (the same for all makes).

How to read U0129: the letter U means network communication between modules; the second digit 0 marks a generic SAE code shared by all makes; the last three characters 129 identify the specific fault.

ABS/ESC codes: wheel speed sensors, the ABS hydraulic unit and pump, brake booster, pressure and yaw sensors. A hit to a wheel or suspension often damages the wheel speed sensor or its wiring, so on a damaged car this code is a reason to inspect the hub, knuckle and control arms, not just swap the sensor.

Key figures

Complaints with this code: 7
Models: 7
Model years: 2011–2024

Which models and years

Models whose owners name this code (7). Years link to the model year problems page.

Model	Years	Complaints
BMW X3	2022	1
Chevrolet Malibu	2023	1
Chevrolet Silverado 1500	2019	1
Honda Accord Hybrid	2024	1
Honda CR-V	2017	1
Toyota Camry	2011	1
Toyota Corolla	2017	1

Components named together with the code

Component as the owner filed it (one complaint can list several).

Service brakes 4
Electrical system 2
Electronic stability control 2
Fuel/propulsion system 1
Powertrain 1
Steering 1
Other 1
Vehicle speed control 1

Complaints by model year

2011 1
2017 2
2019 1
2022 1
2023 1
2024 1

What to do if an auction car has this code

Inspect the wheel and suspension on the impact side: the wheel speed sensor is often damaged together with the hub or knuckle.
Check whether the ABS and ESC lights stay on after start-up.
After replacing sensors or the hydraulic unit, bleeding and scan tool adaptation may be required.

What owners report

Excerpts of owner complaints in the original wording. Owner statements not verified by the regulator; personal data removed.

The vehicle was taken to Auto Zone, where the portable diagnostic tester was attached to the vehicle. The diagnostic machine retrieved DTC: U0073, P0700, P25A2, U0101,U0129,U0146, U18D5, U18D7, U2413, U0073-00, U0100-00, U0140-00, U0151-00, U026A-00, U0420-00 and U0100.
Chevrolet Malibu 2023 · 2026-08
Failed emissions test.engine control module error codes,U0129 lost communication with brake system control module,codeU0146 lost communication with serial data gateway module,codeU101lost communication with transmission control moduleâ¦next failure brake control system module,code U146 lost communication with serial…
Chevrolet Silverado 1500 2019 · 2026-05
Once I did this and turned on the car, it rebooted and all errors were cleared. Dealership was able to find the following errors logged: U0100-00, U0100-f1, U0101-00, U0122-00, U0122-f1, U0129-00, U0131-00, U0131-f1, U0151-00, and U0416-68.
Honda Accord Hybrid 2024 · 2024-05

Related codes

Sources: public official US data (owner complaints) and the SAE J2012 standard. Complaints are owner statements not verified by the regulator. A code from a complaint does not replace a scan tool diagnosis. Data updated 2026-11-10.