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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 P1002 >> Circuit/System Description

Circuit/System Description

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The K111 Fuel Pump Power Control Module monitors the system voltage on circuit 2640 to ensure that it stays within the proper range. An open or high resistance on the ground circuit 2550 may affect the modules ability to monitor and report the correct system voltage.

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