Possible Causes

WARNING: This page is about a different car, the 2012 Dodge Charger. However, it is still accessible from the selected car via links, so may be relevant.

Possible Causes
CAN INTERIOR BUS (+) CIRCUIT SHORTED TO GROUND
CAN INTERIOR BUS (-) CIRCUIT SHORTED TO VOLTAGE
ANY CAN INTERIOR BUS MODULE
BODY CONTROL MODULE (BCM)