WOMS
U code network Medium severity

U1672 Invalid Data Received from Vehicle Control Module

The OBD2 code U1672 indicates that the vehicle's control module has received invalid or corrupted data from another control module, which may affect vehicle performance or functionality

Definition

The OBD2 code U1672 indicates that the vehicle's control module has received invalid or corrupted data from another control module, which may affect vehicle performance or functionality

Common causes

  • Faulty Vehicle Control Module (VCM)
  • Poor or damaged wiring/connectors
  • Corrupted software or firmware in the VCM
  • Communication issues between modules
  • Faulty sensors sending incorrect data
  • Grounding issues
  • Interference from aftermarket devices or modifications

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 control modules
  • Issues with the OBDII connector or communication port
  • Problems with other control modules affecting communication
  • Battery or power supply issues affecting module operation

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. Sometimes, multiple codes can provide more context for the issue

  2. 2. Inspect Wiring and Connectors

    Examine the wiring and connectors related to the VCM and other modules. Look for signs of damage, corrosion, or loose connections. Repair or replace any damaged components

  3. 3. Check for Ground Issues

    Ensure that the ground connections for the VCM and related modules are secure and free of corrosion. Poor grounding can lead to communication issues

  4. 4. Inspect the VCM

    If the wiring and connectors 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. Test Communication

    Use a scan tool to test communication between the VCM and other modules. If communication is not established, there may be a fault in the VCM or the communication network

  6. 6. Check for Software Updates

    Sometimes, software glitches can cause communication issues. Check if there are any available updates for the VCM or other modules and apply them if necessary

  7. 7. Battery and Charging System Check

    Ensure that the vehicle's battery and charging system are functioning properly. Low voltage can cause communication problems between modules

  8. 8. Clear Codes and Test Drive

    After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code reappears

  9. 9. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the U1672 code for your specific vehicle make and model. Manufacturers may have specific recommendations or known issues that can help in troubleshooting

  10. 10. 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 your vehicle's make and model. They may have access to specialized diagnostic tools and knowledge. By following these steps, you can systematically diagnose and potentially resolve the U1672 code