FixVault
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Jeep
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2023
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Grand Cherokee 4xe
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Repair and Diagnosis
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Engine Performance
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System
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2.0L - DTCS P2127 To P2400
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DTC Troubleshooting
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P2237 O2 Sensor 1/1 Pump Cell Current Circuit / Open
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Set Condition
Set Condition
The Powertrain Control Module (PCM) detects an open on the O2 1/1 Positive Current Control circuit.