Mike's Workshop Manuals
: Service manuals for every vehicle
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Dodge and Ram
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2016
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Durango R/T, AWD
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Repair and Diagnosis
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Engine Performance
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System
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5.7L - DTCS P2172 To U1440
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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
The Powertrain Control Module (PCM) monitors the downstream O2 Sensor. 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.