U0443

Invalid Data Received From Body Control Module B

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–278 (est.)

Symptoms

Incorrect operation of comfort systems (lighting, power windows)
Malfunction indicator light comes on
Problems with central locking
Intermittent operation of electrical equipment
Errors in other vehicle systems

Causes

Problems with the CAN bus (open or short circuit)
Body control module B malfunction
Poor contact in module connectors
Wiring harness damage
Software error in the module

How to Fix

Check connections and connectors of the BCM-B module
Conduct diagnostics of the CAN bus for breaks and short circuits
Read error codes from BCM-B module
If necessary, update the module software
Replace the BCM-B module if a malfunction is detected

Related codes

U0441 U0442 U0444