WOMS
U code network Medium severity

U0445 Invalid Data Received From Body Control Module "D

The OBD2 code U0445 indicates that the vehicle's control module has received invalid or corrupted data from the Body Control Module "D."

Definition

The OBD2 code U0445 indicates that the vehicle's control module has received invalid or corrupted data from the Body Control Module "D."

Common causes

  • Faulty Body Control Module (BCM)
  • Poor electrical connections or wiring issues
  • Corrupted software or firmware in the BCM
  • Faulty communication lines (CAN bus issues)
  • Malfunctioning sensors or components connected to the BCM
  • Low battery voltage or power supply issues
  • Interference from aftermarket accessories or modifications

Common misdiagnoses

  • Faulty Body Control Module (BCM)
  • Wiring issues or short circuits
  • Faulty communication lines (CAN bus issues)
  • Incorrectly programmed or updated BCM
  • Malfunctioning sensors or actuators
  • Power supply issues to the BCM
  • Other module failures affecting communication

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 related issues

  2. 2. Inspect Wiring and Connectors

    Visually inspect the wiring and connectors between the ECM and BCM. Look for signs of damage, corrosion, or loose connections

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

  4. 4. Check for Short Circuits or Open Circuits

    Use a multimeter to test for continuity in the wiring between the ECM and BCM. Look for any short circuits or open circuits that could be causing communication issues

  5. 5. Inspect the Body Control Module (BCM)

    If the wiring and connectors are in good condition, the BCM itself may be faulty. Check for any signs of physical damage or water intrusion

  6. 6. If possible, test the BCM in another vehicle of the same make and model to see if the issue persists

  7. 7. Check for Software Updates

    Sometimes, software glitches can cause communication issues. Check with the manufacturer for any available software updates for the ECM and BCM

  8. 8. Reset the Codes

    Clear the trouble codes using an OBD-II scanner and see if the code returns after a short drive. If it does, further investigation is needed

  9. 9. Check Power and Ground

    Ensure that the BCM is receiving proper power and ground. Use a multimeter to check the voltage at the BCM connector

  10. 10. Scan for Communication Issues

    Use a scan tool that can monitor live data and check for communication between the BCM and other modules. Look for any irregularities in the data being transmitted

  11. 11. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the U0445 code for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes

  12. 12. Professional Diagnosis

    If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or dealership for further diagnosis. They may have specialized tools and knowledge to pinpoint the problem.Conclusion Troubleshooting a U0445 code can be complex, as it involves multiple components and systems. Following these steps systematically can help identify the root cause of the issue and lead to an effective resolution