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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 64 (Rear Drive Axle - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC C111A >> Circuit/System Description

Circuit/System Description

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.

The K164 Differential Control Module is supplying voltage to the rear differential lock actuator motor and is grounded through the control module.