U0140 - Lost Communication With BCM

Communication lost with body control module.

Code Overview

Communication lost with body control module.

Common Causes

• Low system voltage
• CAN wiring issue
• BCM power/ground issue

Diagnostic Steps

1. Check battery/charging
2. Check BCM fuses/grounds
3. Inspect CAN wiring/connectors

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

Browse the closest code-family pages when the same fault pattern often shows up nearby.

Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.