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Jeep
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2020
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Grand Cherokee SRT
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Repair and Diagnosis
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Engine Performance
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System
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6.4L - DTCS P0175 To P0521
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DTC Troubleshooting
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P0325-Knock Sensor 1 Circuit
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Set Condition
Set Condition
The Powertrain Control Module (PCM) detects that the Knock Sensor input voltage is: Above 4.0 volts, less than or equal to 1.0 volt with engine rpm at or above 2200 or equal to 0.0 volts with engine rpm below 2200.