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U1119 Lost Communication with Vehicle Dynamics Control Module

The OBD2 code U1119 indicates a loss of communication with the Vehicle Dynamics Control Module, which may affect the vehicle's stability and traction control systems

Definition

The OBD2 code U1119 indicates a loss of communication with the Vehicle Dynamics Control Module, which may affect the vehicle's stability and traction control systems

Common causes

  • Faulty Vehicle Dynamics Control Module (VDCM)
  • Damaged or corroded wiring or connectors
  • Poor ground connection
  • Faulty communication lines (CAN bus issues)
  • Software or firmware issues in the VDCM
  • Malfunctioning other related modules
  • Battery or power supply issues
  • Intermittent electrical connections

Common misdiagnoses

  • Faulty ABS Module
  • Wiring Issues
  • Faulty Wheel Speed Sensors
  • Malfunctioning Engine Control Module (ECM)
  • Faulty Body Control Module (BCM)
  • Incorrectly Installed or Damaged Connectors
  • Power Supply Issues
  • Faulty Instrument Cluster

Troubleshooting steps

  1. 1. Check for Other Codes

    Use an OBD-II scanner to check for any additional trouble codes. Other codes may provide more context or indicate related issues

  2. 2. Inspect Wiring and Connectors

    Visual Inspection: Check the wiring harness and connectors associated with the VDC module for any signs of damage, corrosion, or loose connections

  3. 3. Connector Pins

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

  4. 4. Check Power and Ground

    Verify that the VDC module is receiving the proper power supply and ground. Use a multimeter to check voltage at the module's power and ground terminals

  5. 5. Test the VDC Module

    If possible, perform a functional test of the VDC module. This may require specialized diagnostic equipment or software

  6. 6. If the module is suspected to be faulty, consider replacing it or testing it in another vehicle if available

  7. 7. Inspect Other Modules

    Since communication issues can be related to other modules, check the functionality of other control modules in the vehicle. Look for any codes or issues in modules that communicate with the VDC

  8. 8. Check for Software Updates

    Sometimes, communication issues can be resolved with a software update. Check with the manufacturer for any available updates for the VDC module or the vehicle's ECU

  9. 9. Clear Codes and Test Drive

    After performing inspections and repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code reappears

  10. 10. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the U1119 code or the VDC module for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes

  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 access to advanced diagnostic tools and resources

  12. 12. Check for Environmental Factors

    Sometimes, environmental factors such as moisture or extreme temperatures can affect module communication. Ensure that the vehicle is in a suitable environment for testing. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the U1119 code. Always refer to the vehicle's service manual for specific procedures and specifications