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Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 231 (HVAC - Automatic) >> Diagnostic Information and Procedures >> DTC P0645, P0646, or P0647 >> DTC Descriptors

DTC Descriptors

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.
DTC P0645

Air Conditioning Compressor Clutch Relay Control Circuit

DTC P0646

Air Conditioning Compressor Clutch Relay Control Circuit Low Voltage

DTC P0647

Air Conditioning Compressor Clutch Relay Control Circuit High Voltage

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