LEMON Manuals
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2025
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Grand Cherokee L Altitude, RWD
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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 P0018 To P0052
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DTC Troubleshooting
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P0051 O2 Sensor 2/1 Heater Circuit Low
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Set Condition
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Set Condition
The Powertrain Control Module (PCM) detects that the O2 Sensor heater circuit resistance is below approximately 2.0 Ohms.