WOMS
U code network Medium severity

U2668 Invalid Data Received from Vehicle Dynamics Control Module

The OBD2 code U2668 indicates that the vehicle's control module has received invalid or corrupted data from the Vehicle Dynamics Control Module, which may affect the vehicle's stability and handling systems

Definition

The OBD2 code U2668 indicates that the vehicle's control module has received invalid or corrupted data from the Vehicle Dynamics Control Module, which may affect the vehicle's stability and handling systems

Common causes

  • Faulty Vehicle Dynamics Control Module (VDCM)
  • Poor or damaged wiring/connectors between the VDCM and the ECU
  • Corrupted software or firmware in the VDCM
  • Malfunctioning sensors related to vehicle dynamics (e.g., wheel speed sensors)
  • Communication issues within the CAN bus network
  • Low battery voltage or electrical system issues
  • Faulty ECU (Engine Control Unit) or other related control modules
  • Grounding issues affecting the VDCM or related components

Common misdiagnoses

  • Faulty ABS module
  • Defective wheel speed sensors
  • Wiring issues or shorts in the harness
  • Malfunctioning traction control system
  • Incorrectly calibrated or faulty steering angle sensor
  • Issues with the engine control module (ECM)
  • Problems with the vehicle stability control system
  • Battery or charging system issues

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. Sometimes, multiple codes can provide more context for the issue

  2. 2. Inspect Wiring and Connectors

    Visual Inspection: Check the wiring and connectors related to the Vehicle Dynamics Control Module (VDCM) for any signs of damage, corrosion, or loose connections

  3. 3. Connector Pins

    Ensure that the pins in the connectors are not bent or corroded

  4. 4. Check the Vehicle Dynamics Control Module

    Functionality: Verify that the VDCM is functioning properly. This may involve checking for proper operation of the module and ensuring it is receiving power and ground

  5. 5. Software Updates

    Check if there are any software updates available for the VDCM that may address known issues

  6. 6. Inspect Related Components

    Check other components that interact with the VDCM, such as wheel speed sensors, steering angle sensors, and yaw rate sensors. Faulty sensors can lead to invalid data being sent to the VDCM

  7. 7. Perform a System Reset

    Clear the trouble codes using the OBD-II scanner and see if the code returns after a test drive. Sometimes, a temporary glitch can cause the code to set

  8. 8. Check for Ground Issues

    Ensure that the ground connections for the VDCM and related components are secure and free of corrosion

  9. 9. Test the VDCM

    If you have access to diagnostic tools, perform a bench test on the VDCM to ensure it is operating within specifications

  10. 10. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the specific make and model of the vehicle. Manufacturers may have issued bulletins regarding known issues with the VDCM

  11. 11. Professional Diagnosis

    If the issue persists after performing the above steps, consider seeking help from a professional mechanic or dealership. They may have specialized diagnostic tools and experience with the specific vehicle

  12. 12. Document Findings

    Keep a record of any findings, repairs made, and codes that were present. This information can be helpful for future reference or if professional assistance is needed. By following these steps, you can systematically approach the troubleshooting of the U2668 code and potentially identify the root cause of the issue