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Home >> Jeep >> 2021 >> Grand Cherokee SRT >> Repair and Diagnosis >> Engine Performance >> System >> 6.4L - DTCS P1621 To P2317 >> DTC Troubleshooting >> P2271-O2 Sensor 1/2 Signal Stuck Rich >> When Monitored
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When Monitored

With the engine running, vehicle speed above 96 kph (60 mph), throttle open for a minimum of 120 seconds, ECT greater than 70°C (158°F), Catalytic Converter temperature greater than 600°C (1112°F) and downstream Oxygen Sensor in a rich state. During a decel fuel shutoff event, the downstream Oxygen Sensor should switch from rich to lean within a specific time.