AutoCodes – GMC – U0126 GMC

U0126 GMC Code - Lost Communication With Steering Wheel Angle 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 Steering Wheel Angle Sensor Module, Steering Wheel Angle Sensor Module harness is open or shorted, Steering Wheel Angle 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: U0126 GMC indicates Lost Communication With Steering Wheel Angle Sensor Module.
Common causes: Common causes include Faulty Steering Wheel Angle Sensor Module, Steering Wheel Angle Sensor Module harness is open or shorted, Steering Wheel Angle 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 3,099

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 U0126 GMC 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 Steering Wheel Angle Sensor Module has not been received.

OBDII Code U0126 GMC - Lost Communication With Steering Wheel Angle Sensor Module - AutoCodes.com — U0126 GMC Code - Lost Communication With Steering Wheel Angle Sensor Module

What does this mean?

What are the Possible Causes of the DTC U0126 GMC?

Faulty Steering Wheel Angle Sensor Module
Steering Wheel Angle Sensor Module harness is open or shorted
Steering Wheel Angle Sensor Module circuit poor electrical connection

How to Fix the DTC U0126 GMC?

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 U0126 GMC 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.

Need more information about the U0126 GMC code?

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Need Help with the Code?

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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 U0126 GMC Code

1. What are the common symptoms of OBDII code U0126 in a GMC related to lost communication with the steering wheel angle sensor module?

- Common symptoms include the loss of power steering functionality, illuminated warning lights on the dashboard, and potential issues with stability control systems.

2. What are the possible causes of OBDII code U0126 in a GMC?

- The code U0126 can be triggered by issues such as a faulty steering wheel angle sensor module, damaged wiring or connectors, a malfunctioning control module, or software issues.

3. How can I diagnose the root cause of the U0126 code in my GMC?

- To diagnose the issue, start by checking the wiring and connectors for any visible damage or loose connections. You may also need to use a diagnostic scan tool to communicate with the affected module and check for specific error codes.

4. Can I drive my GMC with the U0126 code present?

- It is not recommended to drive your GMC with the U0126 code triggered, as it can affect the proper functioning of critical safety systems like power steering and stability control.

5. How can I repair the U0126 code in my GMC?

- Repair options include fixing or replacing the steering wheel angle sensor module, repairing damaged wiring, and addressing any issues with the control module or software programming.

6. Is it possible to reset the U0126 code in a GMC without fixing the underlying issue?

- While you can clear the code temporarily with a diagnostic scan tool, it is crucial to address the root cause to prevent the code from reappearing and ensure the proper functioning of your vehicle's safety systems.

7. Are there any DIY tips for troubleshooting the U0126 code in a GMC?

- DIY tips include visually inspecting the wiring and connectors for damage, ensuring they are securely connected, and checking for any visible signs of component failure before seeking professional assistance.

8. Can extreme weather conditions impact the occurrence of the U0126 code in a GMC?

- Extreme weather conditions, such as extreme heat or cold, can potentially affect the performance of electronic components and wiring, leading to the triggering of the U0126 code.

9. How long does it typically take to repair the U0126 code in a GMC?

- The repair time can vary depending on the specific cause of the U0126 code. Simple fixes like reconnecting loose wiring may take less time, while replacing a faulty module or addressing more complex issues could require more time.

10. Is it necessary to visit a dealership for repairs related to the U0126 code in a GMC?

- While visiting a dealership is an option, independent mechanics and specialized auto repair shops can also effectively diagnose and repair issues related to the U0126 code in a GMC.