Conditions for Setting the DTC
WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.
C1135 13 or C1135 92
The differential control module detects a fault on the rear differential lock actuator motor circuit.
C1135 67
Differential lock motor signal incorrect after event.
C1135 71
Differential lock motor actuator stuck.
C1135 77
Differential lock motor commanded position not reachable.
C1135 98
Differential lock motor component or system over temperature.