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Jeep
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2025
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Grand Cherokee L 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 P0325 To P0340
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DTC Troubleshooting
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P0328 Knock Sensor 1 Circuit High
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Set Condition
Set Condition
The Powertrain Control Module (PCM) detects that the Knock Sensor 1 Signal circuit is shorted high.