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U0122 Chevrolet Code - Lost Communication With Vehicle Stability Control Module

Quick Answer

The U0122 code for Chevrolet vehicles indicates that there is a communication problem between the Engine Control Module (ECM) and the Vehicle Stability Control Module (VSCM). Common causes include Faulty wiring or connections between the ECM and VSCM, A malfunctioning VSCM, Corrosion or damage to the communication bus that connects the modules. 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 Chevrolet indicates Lost Communication With Vehicle Stability Control Module.
Common causes
Common causes include Faulty wiring or connections between the ECM and VSCM, A malfunctioning VSCM, Corrosion or damage to the communication bus that connects the modules.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 18, 2024
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Code U0122 Chevrolet Description

The U0122 code for Chevrolet vehicles indicates that there is a communication problem between the Engine Control Module (ECM) and the Vehicle Stability Control Module (VSCM). The VSCM is responsible for controlling the vehicle's stability and traction control systems, which are crucial for maintaining control and safety while driving. When communication is lost with this module, it can result in the vehicle's stability and traction control systems not functioning properly, potentially leading to unsafe driving conditions.

OBDII Code U0122 Chevrolet - Lost Communication With Vehicle Stability Control Module
U0122 Chevrolet Code - Lost Communication With Vehicle Stability Control Module

Common Causes of U0122 Chevrolet

  1. Faulty wiring or connections between the ECM and VSCM.
  2. A malfunctioning VSCM.
  3. Corrosion or damage to the communication bus that connects the modules.
  4. Software issues or programming errors within the ECM or VSCM.

Symptoms of U0122 Chevrolet

  1. Illuminated traction control or stability control warning lights on the dashboard.
  2. Loss of traction control or stability control functionality.
  3. Erratic or inconsistent braking behavior.
  4. Difficulty controlling the vehicle in slippery or low-traction conditions.

How to Fix U0122 Chevrolet

  1. Begin by inspecting the wiring harness and connections between the ECM and VSCM for any signs of damage, corrosion, or loose connections.
  2. Check the communication bus for any faults or damage that may be interrupting the signal between the modules.
  3. If the wiring and connections are in good condition, the VSCM may need to be replaced if it is found to be malfunctioning.
  4. Perform a diagnostic scan and reprogram the ECM and VSCM to ensure proper communication and functionality.
  5. Clear the trouble codes and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix U0122 Chevrolet

The cost of repairing a U0122 code on a Chevrolet can vary depending on the specific cause of the issue. In general, the cost of replacing a VSCM can range from $300 to $800, including parts and labor. However, if the problem is related to wiring or connections, the cost may be lower. It's recommended to consult with a certified mechanic or dealership for a more accurate cost estimate based on the specific diagnosis of the vehicle. Keep in mind that labor rates and part prices can vary depending on the location and type of repair facility.

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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 Chevrolet Code

1. What does the OBDII code U0122 mean on a Chevrolet?

U0122 indicates lost communication with the Vehicle Stability Control (VSC) module, meaning the module is not transmitting or receiving data on the Controller Area Network (CAN) bus.

2. What are the common symptoms of the U0122 code on a Chevrolet?

Symptoms may include the stability control light or ABS light turning on, loss of traction control functionality, erratic handling, or difficulty maintaining stability during driving.

3. What causes the U0122 code to trigger on a Chevrolet?

Common causes include a faulty VSC module, damaged or corroded wiring or connectors in the CAN bus, a blown fuse, or a software issue in the vehicle's control modules.

4. Can I still drive my Chevrolet with a U0122 code?

While the vehicle may still be drivable, stability and traction control features may be compromised, increasing the risk of losing control, especially in slippery conditions.

5. How can I fix the U0122 code on my Chevrolet?

Start by inspecting the wiring and connectors to the VSC module for damage or corrosion, checking fuses, and ensuring the CAN bus system is functioning properly. If no issues are found, the module may need to be replaced or reprogrammed.

6. How do I locate the Vehicle Stability Control module in my Chevrolet?

The VSC module is typically located near the ABS pump assembly or under the dashboard, depending on the specific model. Consult the vehicle's repair manual for the exact location.

7. Can a low battery cause the U0122 code on my Chevrolet?

Yes, a low or weak battery can cause communication issues between modules, potentially triggering the U0122 code.

8. Do I need to reprogram the VSC module after replacing it?

Yes, in most cases, the new VSC module will need to be programmed or coded to match your Chevrolet's specifications.

9. What tools are needed to diagnose the U0122 code on a Chevrolet?

You will need an advanced OBDII scanner capable of reading CAN bus communication data and a multimeter to test wiring and connections.

10. Can a software update fix the U0122 code on my Chevrolet?

Yes, if the issue is related to a software glitch in one of the control modules, a software update from the manufacturer may resolve the problem.

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