Technical Definition:

Oxygen (O2) Sensor Signalstuck Rich (Bank 1 – Sensor 2)

Trouble Code: P2271
Address: 0x2271
System: Powertrain
Subsystem: Fuel and Air Metering
Technical Description:

Possible Causes:

Possible Symptoms:

O2 Sensor Signal Biased/Stuck Rich Bank 1 Sensor 2

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Rear Heated Oxygen Sensor Bank 1
– Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
– Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
– Intake air leaks
– Exhaust gas leaks
– Inappropriate fuel pressure
– Faulty fuel injectors

Specific Makes:

– High Fuel Consumption
– Excessive Smoke from Exhaust

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