What does fault code U0140 mean?

Lost Communication with BCM (Body Control Module). Other control modules cannot communicate with the Body Control Module (BCM).

U0140

Lost Communication with BCM (Body Control Module)

Q: What are the possible causes of U0140?

BCM power or ground fault; BCM internal fault; CAN bus wiring issue; BCM connector poor contact.

Severity: Medium Network & Communication Generic Code

Detailed Description

Other control modules cannot communicate with the Body Control Module (BCM).

Possible Causes

BCM power or ground fault

BCM internal fault

CAN bus wiring issue

BCM connector poor contact.

Solutions & Repair Guide

Check BCM power supply fuses and ground; Check BCM connector; Check related CAN wiring; If all other modules communicate normally, the BCM is most likely at fault.

Disclaimer: The information above is for reference only and does not constitute professional repair advice. Actual causes may vary depending on vehicle make, model, year, and configuration. Always consult a qualified technician for accurate diagnosis.