U0140
U0140 means "Lost Communication With Body Control Module (BCM)". Severity: 🔴 High. Avoid driving if possible — this can cause damage or be a safety risk. Get it diagnosed right away.
What the U0140 code means
| Code | U0140 |
| Definition | Lost Communication With Body Control Module (BCM) |
| System | Network / Communication |
| Type | Generic (SAE standard) |
| Subsystem | — |
| Severity | 🔴 High |
Common causes of U0140
- CAN bus fault
- Failed BCM
- Connector/ground issue
How to fix U0140
- Inspect BCM wiring and power
- Check grounds
Always confirm the diagnosis with a scan tool and live data before replacing parts.
Is it safe to drive with U0140?
Avoid driving if possible — this can cause damage or be a safety risk. Get it diagnosed right away.
U0140, answered.
What does U0140 mean?
U0140 stands for "Lost Communication With Body Control Module (BCM)". It is a generic (sae standard) OBD-II network / communication trouble code.
Is it safe to drive with a U0140 code?
Avoid driving if possible — this can cause damage or be a safety risk. Get it diagnosed right away.
What causes U0140?
Common causes include: CAN bus fault; Failed BCM; Connector/ground issue.
How do you fix U0140?
Typical fixes: Inspect BCM wiring and power; Check grounds. Always confirm the diagnosis before replacing parts.