AutoCodes – Buick – U0123 Buick

U0123 Buick Code - Lost Communication with Yaw Rate Sensor Module

Quick Answer

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Yaw Rate Sensor Module, Yaw Rate Sensor Module harness is open or shorted, Yaw Rate Sensor Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: U0123 Buick indicates Lost Communication with Yaw Rate Sensor Module.
Common causes: Common causes include Faulty Yaw Rate Sensor Module, Yaw Rate Sensor Module harness is open or shorted, Yaw Rate Sensor Module circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 756

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 01, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0123 Buick Description

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. The supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Yaw Rate Sensor Module has not been received.

OBDII Code U0123 Buick - Lost Communication with Yaw Rate Sensor Module - AutoCodes.com — U0123 Buick Code - Lost Communication with Yaw Rate Sensor Module

What does this mean?

What are the Possible Causes of the DTC U0123 Buick?

Faulty Yaw Rate Sensor Module
Yaw Rate Sensor Module harness is open or shorted
Yaw Rate Sensor Module circuit poor electrical connection

How to Fix the DTC U0123 Buick?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U0123 Buick code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U0123 Buick Code

1. What are the common symptoms of OBDII code U0123 in a Buick related to the Lost Communication with Yaw Rate Sensor Module?

- Common symptoms include the traction control light or stability control light illuminating on the dashboard, along with potential issues with the vehicle's stability control system.

2. What are the possible causes of OBDII code U0123 in a Buick?

- The code U0123 indicates a communication problem with the yaw rate sensor module, which could be caused by a faulty sensor module, damaged wiring, loose connections, or a malfunctioning control module.

3. How can I diagnose the OBDII code U0123 in my Buick?

- Diagnosing the code U0123 typically involves using a diagnostic scanner to retrieve the code, checking for any related trouble codes, inspecting the wiring and connections to the yaw rate sensor module, and testing the sensor module itself for proper functionality.

4. Can I still drive my Buick with the U0123 code present?

- It is not recommended to drive the vehicle with the U0123 code present, as it indicates a potential issue with the stability control system that could affect the vehicle's handling and safety.

5. How can I repair the OBDII code U0123 in my Buick?

- Repairing the U0123 code usually involves addressing the root cause of the communication problem, which may include replacing the yaw rate sensor module, repairing damaged wiring, securing loose connections, or reprogramming the control module.

6. Is it possible to reset the U0123 code in my Buick without fixing the underlying issue?

- While you can clear the code using a diagnostic scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring and ensure the proper functioning of the stability control system.

7. How much does it typically cost to repair the U0123 code in a Buick?

- The repair costs for the U0123 code can vary depending on the root cause of the issue, but it may involve parts and labor expenses for replacing the yaw rate sensor module, repairing wiring, or reprogramming the control module.

8. Can a DIY enthusiast fix the U0123 code in a Buick?

- Depending on your experience and access to tools, a DIY enthusiast may be able to address the U0123 code by inspecting and repairing wiring, checking connections, or replacing the yaw rate sensor module. However, more complex issues may require professional diagnosis and repair.

9. How long does it take to repair the U0123 code in a Buick?

- The repair time for the U0123 code can vary based on the specific issue causing the communication problem. Simple fixes like reseating connections may take a short time, while more involved repairs like sensor module replacement could require more time.

10. Will the U0123 code cause my Buick to fail an emissions test?

- The U0123 code is related to the stability control system and should not directly impact emissions. However, it is essential to address the code to ensure the proper functioning of the vehicle's systems and overall safety.