WOMS
U code network Medium severity

U1373 Invalid Data Received from Vehicle Control Module

The OBD2 code U1373 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 U1373 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)
  • Corrupted or damaged wiring harness
  • Poor electrical connections
  • Faulty sensors or actuators
  • Software issues or bugs in the VCM
  • Communication issues between modules
  • Low battery voltage or power supply issues
  • Grounding problems

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
  • Grounding issues
  • Incorrectly installed aftermarket components

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. This can provide more context and help identify the root cause of the issue

  2. 2. Inspect Wiring and Connectors

    Examine the wiring and connectors associated with the control modules involved. 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 for the control modules are secure and free of corrosion. Poor grounding can lead to communication issues

  4. 4. Inspect Control Modules

    If the wiring and connections appear to be in good condition, inspect the control modules themselves for any signs of damage or failure. This may involve checking for water intrusion, physical damage, or burnt components

  5. 5. Perform a Network Test

    Use a scan tool to perform a network test to check the communication between the control modules. This can help identify if a specific module is not communicating properly

  6. 6. Update Software/Firmware

    Check if there are any available updates for the vehicle's control modules. Sometimes, software bugs can cause communication issues, and updating the firmware can resolve these problems

  7. 7. Clear Codes and Test Drive

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

  8. 8. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the specific make and model of the vehicle. Manufacturers may have issued guidance on common issues related to the U1373 code

  9. 9. Professional Diagnosis

    If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or technician who has experience with the specific vehicle and its control systems. By following these troubleshooting steps, you can systematically identify and resolve the underlying issue causing the U1373 code