WOMS
U code network Medium severity

U1379 Invalid Data Received from Vehicle Control Module

The OBD2 code U1379 indicates that the vehicle's control module has received invalid or corrupted data from another control module, suggesting a communication issue within the vehicle's network

Definition

The OBD2 code U1379 indicates that the vehicle's control module has received invalid or corrupted data from another control module, suggesting a communication issue within the vehicle's network

Common causes

  • Faulty Vehicle Control Module (VCM)
  • Corrupted or damaged software in the VCM
  • Poor electrical connections or wiring issues
  • Faulty sensors sending incorrect data
  • Communication issues between modules
  • Low battery voltage or power supply problems
  • Interference from aftermarket devices or modifications

Common misdiagnoses

  • Faulty Vehicle Control Module (VCM)
  • Wiring issues or short circuits
  • Corrupted software or firmware in the VCM
  • Faulty sensors or actuators
  • Issues with the communication network (CAN bus)
  • Battery or power supply problems
  • Incorrectly installed aftermarket components

Troubleshooting steps

  1. 1. Check for Other Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. Addressing related codes can help in diagnosing the root cause of the U1379 code

  2. 2. Inspect Wiring and Connectors

    Examine the wiring and connectors associated with the VCM and other control modules. Look for signs of damage, corrosion, loose connections, or frayed wires. Repair or replace any damaged components

  3. 3. Check for Ground Issues

    Ensure that all ground connections are secure and free of corrosion. Poor grounding can lead to communication issues between modules

  4. 4. Inspect the VCM

    If the wiring and connections are in good condition, inspect the VCM itself for any signs of damage or malfunction. This may include checking for water intrusion or physical damage

  5. 5. Update Software/Firmware

    Sometimes, communication issues can be resolved by updating the software or firmware of the vehicle's control modules. Check with the manufacturer for any available updates

  6. 6. Perform a Hard Reset

    Disconnect the vehicle's battery for a few minutes to reset the control modules. Reconnect the battery and see if the code reappears

  7. 7. Check for Interference

    If there are aftermarket devices installed (like alarms, remote starters, or other electronic accessories), they may interfere with the communication between modules. Temporarily disconnect these devices to see if the issue persists

  8. 8. Test the Control Modules

    If the problem continues, you may need to test the control modules for proper operation. This may require specialized diagnostic equipment or tools

  9. 9. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the U1379 code for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes

  10. 10. Seek Professional Help

    If you are unable to resolve the issue after performing these steps, it may be best to consult a professional mechanic or technician who has experience with your vehicle's make and model. By following these troubleshooting steps, you can systematically identify and address the underlying cause of the U1379 code