WOMS
U code network Medium severity

U0254 Lost Communication With Remote Start Module

The OBD2 code U0254 indicates that there is a lost communication issue with the remote start module, meaning the vehicle's control module is unable to receive data from the remote start system

Definition

The OBD2 code U0254 indicates that there is a lost communication issue with the remote start module, meaning the vehicle's control module is unable to receive data from the remote start system

Common causes

  • Faulty remote start module
  • Wiring issues or damaged connectors
  • Corroded terminals
  • Blown fuses
  • Software or programming issues
  • Battery voltage problems
  • Interference from aftermarket devices
  • Faulty body control module (BCM)

Common misdiagnoses

  • Faulty Remote Start Module
  • Wiring Issues
  • Faulty Body Control Module (BCM)
  • Faulty Engine Control Module (ECM)
  • Battery Voltage Issues
  • Corroded Connectors
  • Faulty Key Fob
  • Software Issues or Updates Needed

Troubleshooting steps

  1. 1. Check for Other Codes

    Use an OBD-II scanner to check for any additional trouble codes. Sometimes, other codes can provide context or indicate related issues

  2. 2. Inspect Wiring and Connectors

    Visual Inspection: Check the wiring harness and connectors associated with the remote start 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 pushed back

  4. 4. Verify Power and Ground

    Power Supply: Use a multimeter to check if the remote start module is receiving the correct voltage

  5. 5. Ground Connection

    Ensure that the ground connection for the module is secure and functioning properly

  6. 6. Check for Module Functionality

    If possible, test the remote start module itself. This may involve swapping it with a known good module or using a diagnostic tool to check its functionality

  7. 7. Inspect the Remote Start System

    Ensure that the remote start system is properly installed and configured. If it was recently installed, verify that all connections were made correctly

  8. 8. Check for Interference

    Look for any aftermarket devices or modifications that may interfere with the communication between the remote start module and the vehicle’s network

  9. 9. Perform a Network Scan

    Use a professional-grade scan tool to perform a network scan. This can help identify communication issues between modules on the vehicle’s CAN bus

  10. 10. Reset the System

    Clear the trouble codes using the OBD-II scanner and see if the code returns. Sometimes, a reset can resolve temporary communication issues

  11. 11. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the remote start module or communication issues for your specific vehicle make and model

  12. 12. Seek Professional Help

    If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or technician who has experience with your vehicle’s specific systems.Additional Considerations

  13. 13. Battery Voltage

    Ensure that the vehicle’s battery is in good condition and fully charged, as low voltage can cause communication issues

  14. 14. Software Updates

    Check if there are any software updates available for the vehicle’s modules that may address communication issues. By following these troubleshooting steps, you should be able to identify the cause of the U0254 code and take appropriate action to resolve the issue