U0123Network Communication

Lost Communication With Yaw Rate Sensor Module

U0123 means a module has lost communication with the yaw rate sensor module over the CAN bus. This sensor feeds stability control. It usually points to a wiring, power, ground, or connector fault.

🚗 Use caution. Stability control may be limited, but the vehicle usually still drives normally.

MEDIUM

severity

🎯 Top Causes, Ranked by Likelihood

#1Wiring, connector, or CAN bus fault$50-$500

45%

Damaged or corroded wiring to the yaw rate sensor module.

#2Power or ground fault$50-$400

30%

Blown fuse or poor ground at the module.

#3Failed yaw rate sensor module$200-$800

15%

The sensor module itself has failed.

🩺 Common Symptoms

Stability control warning
Traction control limited
ABS warning light
Warning lights
Other U-codes stored

💰 Repair Cost: DIY vs Shop

DIY Cost

$50-$400

Shop Cost

$150-$900

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose U0123

1Check fuses, power, and grounds for the sensor module

2Inspect CAN wiring and connectors at the module

3Scan all modules for lost-communication patterns

4Back-probe the CAN bus for correct signal

❓ Frequently Asked Questions

Can I drive with U0123?

Usually yes, but stability control may be limited. Diagnose it before driving in poor conditions.

What causes U0123?

Wiring, connector, or power/ground faults at the yaw rate sensor module, most often.

What does the yaw rate sensor do?

It measures the vehicle's rotation to help stability control detect skids. Without it, that system is limited.

🔗 Related Codes

U0100U0121U0122U0125