Mike's Workshop Manuals
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Jeep
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2025
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Grand Cherokee Summit
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Repair and Diagnosis
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Engine Performance
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System
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3.6L - DTCS P0642 To P0699
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DTC Troubleshooting
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P0645 A/C Control Circuit/Open
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Set Condition
Set Condition
The PCM detects an open or short in the A/C Compressor Clutch Control circuitry.