WOMS
U code network Medium severity

U1371 Invalid Data Received from Vehicle Control Module

The OBD2 code U1371 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 U1371 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
  • Low battery voltage or electrical issues
  • Faulty sensors sending incorrect data
  • Grounding issues in the electrical system

Common misdiagnoses

  • Faulty Vehicle Control Module (VCM)
  • Wiring issues or short circuits
  • Corrupted software or firmware in the VCM
  • Faulty sensors or actuators
  • Communication issues between modules
  • Battery or power supply problems
  • Grounding issues
  • Incorrectly installed aftermarket components

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 about the issue

  2. 2. Inspect Wiring and Connectors

  3. 3. Check the wiring and connectors related to the control modules involved. Look for signs of damage, corrosion, or loose connections

  4. 4. Pay special attention to the ground connections, as poor grounding can lead to communication issues

  5. 5. Verify Control Module Functionality

  6. 6. If possible, test the control module that is sending the invalid data. This may involve using specialized diagnostic tools or software

  7. 7. If the module is faulty, it may need to be reprogrammed or replaced

  8. 8. Check for Software Updates

  9. 9. Sometimes, control modules may require software updates to function correctly. Check with the manufacturer or a dealership for any available updates

  10. 10. Inspect the CAN Bus

  11. 11. The Controller Area Network (CAN) bus is responsible for communication between control modules. Use a multimeter or oscilloscope to check for proper voltage levels and signal integrity on the CAN bus

  12. 12. Look for short circuits, open circuits, or noise on the bus

  13. 13. Clear Codes and Test Drive

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

  15. 15. Check for Environmental Factors

  16. 16. Sometimes, environmental factors such as moisture or extreme temperatures can affect the performance of control modules. Inspect for any signs of water intrusion or damage

  17. 17. Consult Technical Service Bulletins (TSBs)

  18. 18. Check for any TSBs related to the U1371 code for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes

  19. 19. Seek Professional Help

  20. 20. 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. By following these troubleshooting steps, you can systematically identify and resolve the underlying issue causing the U1371 code