WOMS
U code network Medium severity

U0144 Lost Communication With Body Control Module "D

The OBD2 code U0144 indicates a loss of communication with the Body Control Module "D," which means that the vehicle's diagnostic system is unable to communicate with that specific module, potentially affecting various...

Definition

The OBD2 code U0144 indicates a loss of communication with the Body Control Module "D," which means that the vehicle's diagnostic system is unable to communicate with that specific module, potentially affecting various electrical functions

Common causes

  • Faulty Body Control Module (BCM)
  • Damaged wiring or connectors
  • Corroded terminals
  • Poor ground connections
  • Faulty communication network (CAN bus)
  • Software issues or bugs
  • Low battery voltage
  • Intermittent electrical connections
  • Other module failures affecting communication

Common misdiagnoses

  • Faulty Body Control Module (BCM)
  • Wiring issues or damaged connectors
  • Faulty Instrument Cluster
  • Defective Powertrain Control Module (PCM)
  • Battery or charging system problems
  • Faulty CAN bus communication
  • Grounding issues
  • Software glitches or updates needed

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 or indicate related issues

  2. 2. Inspect Wiring and Connectors

    Visual Inspection: Check the wiring harness and connectors related to the BCM for any signs of damage, corrosion, or loose connections

  3. 3. Connector Pins

    Ensure that the pins in the connectors are not bent, corroded, or damaged

  4. 4. Check Power and Ground

    Verify that the BCM is receiving the correct power supply and ground. Use a multimeter to check voltage at the BCM connector

  5. 5. Check the fuses related to the BCM and replace any that are blown

  6. 6. Test the Body Control Module

    If possible, test the BCM for proper operation. This may involve using a scan tool to communicate with the module and check for any internal faults

  7. 7. If you have access to a known good BCM, you can swap it out to see if the issue resolves

  8. 8. Inspect Other Modules

    Check for communication issues with other modules in the vehicle. If other modules are also reporting communication errors, it may indicate a broader network issue

  9. 9. Ensure that all modules on the CAN bus are functioning properly

  10. 10. Check for Short Circuits or Open Circuits

    Use a multimeter to check for short circuits or open circuits in the wiring between the ECM and BCM

  11. 11. Look for any signs of wear or damage in the wiring harness

  12. 12. Update Software/Firmware

    Check if there are any software updates available for the BCM or ECM. Sometimes, communication issues can be resolved with a software update

  13. 13. Clear Codes and Test Drive

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

  14. 14. Seek Professional Help

    If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or technician who has experience with automotive electrical systems and can perform more advanced diagnostics. By following these steps, you should be able to identify and resolve the issue causing the U0144 code