Conditions for Setting the DTC
WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
B19A0 11
The Lighting Control Module detects a short to ground in the Rear License Lamp Supply Voltage Circuit.
B19A0 12
The Lighting Control Module detects a short to voltage in the Rear License Lamp Supply Voltage Circuit.
B19A0 13
The Lighting Control Module detects an open/high resistance in the Rear License Lamp Supply Voltage Circuit.