U0144: Lost Communication With Body Control Module D

What does U0144 mean?

U0144 is a diagnostic trouble code indicating "Lost Communication With Body Control Module D". The vehicle's main computer has lost its ability to communicate with a specific module over the data bus. This could be caused by a wiring fault, a blown fuse, or a failed control module.

Symptoms you may notice

• Check engine light (MIL) illuminated on dashboard
• Possible issues with communication bus operation
• Vehicle may enter reduced power mode (limp mode)

Common causes

• Failed control module
• CAN bus wiring fault or short
• Blown fuse to the affected module
• Water intrusion in a connector or module
• Battery voltage too low

What should you do?

This code sits in the body control module or something wired through it. That module runs the unglamorous things you only miss when they stop: headlights, wipers, indicators, central locking. The car will usually drive, but check what has actually stopped working before you rely on it at night or in the wet.