ShopBaseFree forever shop management software for auto repair shops
Try ShopBase Free →
Home/DTC Codes/Dacia/Spring/2021-2024 Electric/U0129
U0129

Lost Communication with Brake System Control Module

2021-2024 Dacia Spring Electric 🇩🇪

Critical SeverityNetwork

Description

Cannot communicate with the general brake system control module.

Symptoms

  • Brake warning light on
  • ABS disabled
  • Stability control off
  • Brake system message displayed

Common Causes

  • Brake module failure
  • CAN bus wiring damage
  • Module power loss
  • Fuse blown
  • Water damage

Diagnostic Steps

  1. Check brake system fuses
  2. Test module power and ground
  3. Check CAN wiring
  4. Inspect module for water damage
  5. Try direct module communication

Repair Notes

Check fuses and power supply. Inspect for water damage near brake module location.

Related Codes

U0121Lost Communication with ABS ModuleU0128Lost Communication with Brake Boost Control Module

Other Network Codes

U0129 on Other Vehicles

Dacia Bigster

2025-2025 1.2L I3 Turbo TCe 130

Dacia Bigster

2025-2025 1.6L I4 Hybrid 155

Dacia Duster

2017-2024 1.0L I3 TCe

Dacia Duster

2017-2024 1.3L I4 TCe

Dacia Duster

2017-2024 1.5L I4 dCi

Dacia Duster

2024-2025 1.0L I3 TCe 100 LPG

Dacia Duster

2024-2025 1.2L I3 Hybrid TCe 130

Dacia Duster PL

2018-2025 1.0L I3 Turbo TCe 100

Common Questions

What does code U0129 mean on a 2021-2024 Dacia Spring?

U0129 stands for "Lost Communication with Brake System Control Module". Cannot communicate with the general brake system control module.

What are the symptoms of U0129 on a Dacia Spring?

Common symptoms of U0129 include: Brake warning light on, ABS disabled, Stability control off, Brake system message displayed.

What causes U0129 on a 2021-2024 Dacia Spring?

Common causes of U0129 include: Brake module failure, CAN bus wiring damage, Module power loss, Fuse blown, Water damage.

View Labor Times | View Torque Specs | View Fluid Specs