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U0129

Overview

Code

U0129

Code Type

U

Code Class

U0

System

Network

Severity Level

Medium

Emissions Related

false

Drivability Impact

Minor

Diagnostic Protocol

CAN

Freeze Frame Useful

false

Code Definition

Diagnostic trouble code U0129 indicates lost communication with the brake system control module

Symptoms

Brake warning light

Overview applies to this diagnostic code.

Affected Systems

On This Page

  • Code Definition

  • Symptoms

  • Affected Systems

  • Possible Causes

  • Diagnostic Steps

  • Drive Safety Notes​

More Resources

Brake control communication network

Possible Causes

Control module power loss

Diagnostic Steps

1 Check module power supply 2 Inspect CAN network

Drive Safety Notes

Brake assist functions limited

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