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.
C111A 11
The differential control module detects a short to ground on the rear differential lock actuator motor circuit.
C111A 12
The differential control module detects a short to battery on the rear differential lock actuator motor circuit.
C111A 13
The differential control module detects an open on the rear differential lock actuator motor circuit.
C111A 19
The differential control module detects high current on the rear differential lock actuator motor circuit.