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Home >> Fiat >> 2021 >> 500X Pop >> Repair and Diagnosis >> Engine Performance >> System >> 1.3L - DTCS P0607 To P1045 >> DTC Troubleshooting >> P0645-A/C Control Circuit/Open >> Possible Causes

Possible Causes

Possible Causes
A/C COMPRESSOR CONTROL CIRCUIT SHORTED TO VOLTAGE
A/C CLUTCH RELAY CONTROL CIRCUIT SHORTED TO GROUND
A/C CLUTCH RELAY CONTROL CIRCUIT OPEN
A/C CLUTCH RELAY
POWER DISTRIBUTION CENTER (PDC)
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .