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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 135 (12 V Starting And Charging - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P17DD-P17DF >> Circuit/System Description

Circuit/System Description

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The K212 Gear Shift Control Module monitors the system voltage on the B+ circuit 5440 and ignition circuit 2139 to ensure that it stays within the proper range. An open or high resistance on ground circuit 1450 may affect the modules ability to monitor and report the correct system voltage.

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