WOMS
U code network Medium severity

U0444 Invalid Data Received From Body Control Module "C

The OBD2 code U0444 indicates that the vehicle's control module has received invalid or corrupted data from the Body Control Module "C."

Definition

The OBD2 code U0444 indicates that the vehicle's control module has received invalid or corrupted data from the Body Control Module "C."

Common causes

  • Faulty Body Control Module (BCM)
  • Corrupted data communication
  • Wiring issues or damaged connectors
  • Faulty or damaged sensors
  • Software glitches or outdated firmware
  • Electrical interference
  • Poor ground connections
  • Malfunctioning control modules in the network

Common misdiagnoses

  • Faulty Body Control Module (BCM)
  • Wiring issues or shorts in the communication lines
  • Faulty or corroded connectors
  • Issues with other control modules
  • Software glitches or outdated firmware
  • Battery or power supply problems
  • Faulty sensors or actuators related to the BCM
  • Grounding issues in the electrical system

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 additional context and help identify related issues

  2. 2. Inspect Wiring and Connectors

    Visually inspect the wiring and connectors associated with the Body Control Module. Look for signs of damage, corrosion, loose connections, or frayed wires

  3. 3. Ensure that all connectors are securely plugged in and that there are no bent pins

  4. 4. Check for Ground Issues

    Verify that the BCM has a good ground connection. Poor grounding can lead to communication issues and erroneous data

  5. 5. Test the Body Control Module

    If possible, test the BCM for proper operation. This may involve using a scan tool to check for BCM functionality or performing specific tests as outlined in the vehicle's service manual

  6. 6. If the BCM is suspected to be faulty, consider replacing it or reprogramming it if necessary

  7. 7. Inspect the CAN Bus

    The BCM communicates with other modules via the Controller Area Network (CAN) bus. Check for any issues with the CAN bus wiring, such as shorts or opens

  8. 8. Use a multimeter or oscilloscope to check for proper voltage levels and signal integrity on the CAN bus lines

  9. 9. Check for Software Updates

    Sometimes, software glitches can cause communication issues. Check with the manufacturer for any available software updates for the BCM or other related modules

  10. 10. Clear Codes and Test Drive

    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

  11. 11. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the U0444 code or BCM issues for your specific vehicle make and model. Manufacturers may have issued guidance on common problems and fixes

  12. 12. Seek Professional Help

    If the issue persists after performing the above steps, consider seeking help from a qualified automotive technician or dealership. They may have specialized tools and knowledge to diagnose and repair the issue effectively. By following these troubleshooting steps, you can systematically identify and resolve the underlying cause of the U0444 code