What Does U0123 Mean?
The control module network has lost communication with the yaw rate sensor module, which measures vehicle rotation around its vertical axis. This sensor is critical for stability control and rollover prevention systems.
Safety Warning
Stability control and rollover prevention systems will be disabled. Vehicle will lack critical safety interventions during cornering or emergency maneuvers, substantially increasing accident and rollover risk.
Common Causes
40%
Faulty yaw rate sensor module with internal electronics failure or communication circuit damage
25%
Damaged or corroded connector at yaw rate sensor module
20%
CAN bus wiring issues between sensor and control modules
10%
Power supply or ground circuit failure to yaw rate sensor
5%
Vehicle Dynamics or ABS control module communication port failure
Diagnostic Steps
1
Step 1: Locate yaw rate sensor (typically under center console or near center of vehicle) and inspect connector for damage or corrosion
2
Step 2: Check power and ground circuits at sensor connector with multimeter; verify proper voltage supply
3
Step 3: Measure sensor signal output and communication circuit voltage levels with key on
4
Step 4: Use scan tool to monitor yaw rate sensor data stream while gently rotating vehicle on lift or turntable to verify sensor response
5
Step 5: Check CAN bus circuit integrity between sensor location and control modules; test for proper resistance and absence of shorts
Estimated Repair Cost
$150 - $800
Parts + labor, varies by vehicle and location
The control module network has lost communication with the yaw rate sensor module, which measures vehicle rotation around its vertical axis. This sensor is critical for stability control and rollover prevention systems.
The most common cause of U0123 (Lost Communication With Yaw Rate Sensor Module) is: Faulty yaw rate sensor module with internal electronics failure or communication circuit damage
Typical repair costs for U0123 range from $150 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Stability control and rollover prevention systems will be disabled. Vehicle will lack critical safety interventions during cornering or emergency maneuvers, substantially increasing accident and rollover risk.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to U0123 to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Network
System
Stability Control / Vehicle Dynamics System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
