AutoCodes – Buick – U0122 Buick

U0122 Buick Code - Lost Communication With Vehicle Stability Control 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 Vehicle Stability Control Module, Vehicle Stability Control Module harness is open or shorted, Vehicle Stability Control 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: U0122 Buick indicates Lost Communication With Vehicle Stability Control Module.
Common causes: Common causes include Faulty Vehicle Stability Control Module, Vehicle Stability Control Module harness is open or shorted, Vehicle Stability Control 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 2,045

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 U0122 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 Vehicle Stability Control Module has not been received.

OBDII Code U0122 Buick - Lost Communication With Vehicle Stability Control Module - AutoCodes.com — U0122 Buick Code - Lost Communication With Vehicle Stability Control Module

What does this mean?

What are the Possible Causes of the DTC U0122 Buick?

Faulty Vehicle Stability Control Module
Vehicle Stability Control Module harness is open or shorted
Vehicle Stability Control Module circuit poor electrical connection

How to Fix the DTC U0122 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 U0122 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 U0122 Buick Code

1. What are the common symptoms of OBDII code U0122 in a Buick related to lost communication with the Vehicle Stability Control Module?

- Common symptoms include the ABS light, traction control light, or stability control light illuminating on the dashboard. Additionally, you may experience issues with the vehicle's stability control system.

2. What are some possible causes of OBDII code U0122 in a Buick?

- Potential causes include a faulty Vehicle Stability Control Module, damaged wiring or connectors related to the module, loose connections, or a software issue.

3. How can I diagnose the cause of OBDII code U0122 in my Buick?

- A thorough diagnostic process involves checking the wiring and connectors for any damage, ensuring proper connections to the Vehicle Stability Control Module, and potentially using a diagnostic scanner to retrieve specific fault codes.

4. Can I continue driving my Buick with OBDII code U0122 present?

- It is not recommended to continue driving the vehicle with this code active, as it may affect the performance of the stability control system, potentially compromising your safety on the road.

5. How can I repair OBDII code U0122 in my Buick?

- Repairing this code typically involves addressing the root cause, which may include replacing a faulty Vehicle Stability Control Module, repairing damaged wiring or connectors, or reprogramming the module as needed.

6. Is it possible to reset OBDII code U0122 in a Buick without addressing the underlying issue?

- While clearing the code may temporarily turn off the warning lights, it is crucial to address the root cause to prevent the code from reoccurring and ensure the proper functioning of the vehicle's stability control system.

7. Can a DIY enthusiast fix OBDII code U0122 in a Buick, or is professional assistance necessary?

- Depending on your experience and access to tools, some simple checks like inspecting connections and wiring can be done at home. However, diagnosing and repairing complex issues with the Vehicle Stability Control Module may require professional assistance.

8. What should I do if OBDII code U0122 persists even after attempting repairs in my Buick?

- If the code persists after repairs, it is advisable to seek the expertise of a qualified mechanic or dealership for a comprehensive diagnosis and resolution of the issue.

9. Will OBDII code U0122 cause my Buick to fail an emissions test?

- While this code is related to the vehicle's stability control system and not emissions, it is essential to address it promptly to ensure the overall health and safety of your vehicle.

10. How can regular maintenance help prevent OBDII code U0122 from occurring in my Buick?

- Regularly inspecting the vehicle's wiring, connectors, and electronic control modules, as well as following the manufacturer's maintenance schedule, can help prevent issues like U0122 from arising.