AutoCodes – Cadillac – U0122 Cadillac

U0122 Cadillac 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 Cadillac 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 3,633

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

What does this mean?

What are the Possible Causes of the DTC U0122 Cadillac?

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 Cadillac?

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 Cadillac 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 Cadillac Code

1. What does the OBDII code U0122 for Cadillac mean?

The U0122 code indicates a communication problem between the vehicle's onboard computer system and the Vehicle Stability Control (VSC) module.

2. What are the common symptoms of U0122 code in a Cadillac?

Common symptoms of the U0122 code may include the ABS warning light, traction control light, and stability control light illuminating on the dashboard. Additionally, you may experience issues with the vehicle's stability control system.

3. What are the potential causes of the U0122 code in a Cadillac?

The U0122 code in a Cadillac can be caused by a faulty VSC module, damaged wiring or connectors, a blown fuse, or a malfunction in the vehicle's computer system.

4. How do I diagnose the U0122 code in my Cadillac?

To diagnose the U0122 code, a mechanic will use a diagnostic scanner to retrieve the specific error codes, inspect the wiring and connectors related to the VSC module, and perform tests to determine the root cause of the communication failure.

5. Can I still drive my Cadillac with the U0122 code present?

It is not recommended to drive the vehicle with the U0122 code active, as it may affect the performance of the stability control system and compromise the overall safety of the vehicle.

6. How do I repair the U0122 code in my Cadillac?

Repairing the U0122 code may involve replacing the faulty VSC module, repairing damaged wiring or connectors, checking and replacing blown fuses, or reprogramming the vehicle's computer system to restore communication with the VSC module.

7. Is it possible to reset the U0122 code in a Cadillac without repairs?

While you can clear the error code using a diagnostic scanner, it is essential to address the underlying issue causing the communication failure to prevent the code from reoccurring.

8. How much does it cost to fix the U0122 code in a Cadillac?

The cost of fixing the U0122 code in a Cadillac can vary depending on the specific cause of the issue, the required repairs, and the labor rates of the repair shop. It is recommended to consult with a professional technician for an accurate estimate.

9. Can a DIY enthusiast fix the U0122 code in a Cadillac at home?

While some basic troubleshooting steps can be performed at home, diagnosing and repairing the U0122 code may require specialized tools, technical knowledge, and expertise. It is recommended to seek assistance from a qualified mechanic for proper diagnosis and repair.

10. How can I prevent the U0122 code from occurring in my Cadillac in the future?

To prevent the U0122 code from reoccurring, it is crucial to maintain regular vehicle maintenance, address any warning lights or system malfunctions promptly, and ensure the integrity of the wiring and connectors related to the VSC module.