ShopBaseFree forever shop management software for auto repair shops
Try ShopBase Free →
Home/DTC Codes/Chevrolet/Spark EV/2014-2016 Electric Motor/U0129
U0129

Lost Communication with Brake System Control Module

2014-2016 Chevrolet Spark EV Electric Motor

Critical SeverityNetworkGeneric (SAE)

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

Chevrolet Astro

1995-2005 4.3L V6 Vortec

Chevrolet Avalanche

2002-2006 5.3L V8 Vortec

Chevrolet Avalanche

2002-2006 8.1L V8 Vortec

Chevrolet Avalanche

2007-2013 5.3L V8 Vortec

Chevrolet Avalanche

2007-2013 6.0L V8 Vortec

Chevrolet Aveo

2012-2018 1.6L I4

Chevrolet Beat

2018-2021 1.2L I4

Chevrolet Beretta

1990-1996 2.2L I4

Common Questions

What does code U0129 mean on a 2014-2016 Chevrolet Spark EV?

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 Chevrolet Spark EV?

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

What causes U0129 on a 2014-2016 Chevrolet Spark EV?

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