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P0646
A/C Compressor clutch relay drive circuit low voltage / A/C (compressor clutch request off [CAN])
A/C Compressor clutch relay drive circuit low voltage / A/C (compressor clutch request off [CAN])
Documented for: 2.0L gasoline; 2.5L/3.0L gasoline · System(s): EMS EOBD, EMS OBD II · Factory MIL flag: 2
Common causes
- A/C Compressor clutch relay drive circuit: open circuit
- high resistance A/C Compressor clutch relay failure
Quick checks
- Confirm freeze-frame and conditions when the code set
- Inspect connectors, grounds, and harness for the circuit named in the code