Conditions for Setting the DTC
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
DTC B2545 01 and B2545 04
- The BCM detects an open/high resistance in the backup lamps control circuit.
DTC B2545 02
The BCM detects a short to ground in the backup lamps control circuit.