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Cherokee Trailhawk
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Repair and Diagnosis (Single Page)
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Engine Performance
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System
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2.0L - DTCS P2135 To P2311
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DTC Troubleshooting
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P2271-O2 Sensor 1/2 Signal Biased Rich
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Set Condition
Set Condition
If the PCM does not detect a rich to lean switch within a specific time during a decel fuel shutoff event, the monitor will fail.