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Home >> Subaru >> 2017 >> Impreza Base, 4D Sedan, Automatic CVT Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (P2101 To U171F) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P2270: O2 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 2 >> Execution Condition

Execution Condition

Secondary parameters Execution condition
Battery voltage 10.9 V
Sub feedback In operation
Amount of intake air 10g/s (0.35oz/s) or more
Estimated temperature of the rear oxygen sensor element 500°C (932°F) or more
Enable conditions at interrupt control are as follows Continuous time when rear oxygen sensor output voltage is less than 0.55V 50g/10g/s or more
Air fuel ratio reduced from target air fuel ratio Equal to Value of Map
REAR OXYGEN SENSOR OUTPUT VOLTAGE SPECIFICATIONS

Output voltage of rear oxygen sensor V 0.0 0.2 0.2 0.4 0.6
Air fuel ratio reduced from target air fuel ratio % 8 8 4 4 4