WOMS
U code network Medium severity

U1372 Invalid Data Received from Vehicle Control Module

The OBD2 code U1372 indicates that the vehicle's control module has received invalid or corrupted data from another control module, leading to communication issues within the vehicle's network

Definition

The OBD2 code U1372 indicates that the vehicle's control module has received invalid or corrupted data from another control module, leading to communication issues within the vehicle's network

Common causes

  • Faulty Vehicle Control Module (VCM)
  • Poor or damaged wiring/connectors
  • Corrupted software or firmware in the VCM
  • Communication issues between modules
  • Grounding issues
  • Interference from aftermarket devices
  • Low battery voltage or power supply issues

Common misdiagnoses

  • Faulty Vehicle Control Module (VCM)
  • Wiring issues or shorts in the communication lines
  • Faulty sensors or actuators
  • Corrupted software or firmware in the VCM
  • Issues with the Engine Control Module (ECM)
  • Problems with the Transmission Control Module (TCM)
  • Battery or power supply issues affecting module communication
  • Incorrectly installed aftermarket accessories or modifications

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. Addressing related codes can help pinpoint the issue

  2. 2. Inspect Wiring and Connectors

  3. 3. Examine the wiring and connectors associated with the control modules involved. Look for signs of damage, corrosion, or loose connections

  4. 4. Pay special attention to the wiring harnesses that connect the modules, as these can be prone to wear and tear

  5. 5. Check for Software Updates

  6. 6. Verify if there are any software updates available for the vehicle's control modules. Sometimes, manufacturers release updates to fix communication issues

  7. 7. Inspect Control Modules

  8. 8. If the wiring and connectors are in good condition, inspect the control modules themselves for any signs of damage or failure

  9. 9. If possible, test the modules in another vehicle to see if they function correctly

  10. 10. Perform a Hard Reset

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

  12. 12. Check for Ground Issues

  13. 13. Ensure that all ground connections for the control modules are secure and free of corrosion. Poor grounding can lead to communication errors

  14. 14. Test Communication Lines

  15. 15. Use a multimeter or an oscilloscope to test the communication lines (CAN bus) between the control modules. Look for any irregularities in voltage or signal integrity

  16. 16. Scan for Communication Issues

  17. 17. Use a specialized scan tool to check the communication between modules. Some tools can perform a network test to identify which module is not communicating properly

  18. 18. Replace Faulty Components

  19. 19. If a specific control module is identified as faulty, consider replacing it. Ensure that the replacement module is compatible with your vehicle

  20. 20. Consult Technical Service Bulletins (TSBs)

  21. 21. Check for any TSBs related to the U1372 code for your specific vehicle make and model. Manufacturers may have documented common issues and solutions. 1

  22. 22. Seek Professional Help

  23. 23. If the issue persists 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 should be able to identify and resolve the underlying issue causing the U1372 code