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Home >> Subaru >> 2022 >> Ascent Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (4 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P2270: O2 Sensor Signal Biased/Stuck Lean Bank 1 Sensor 2 >> General Description >> Execution Condition
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Execution Condition

Secondary parameters Execution condition
Battery voltage 10.9 V or more
Sub feedback In operation
Amount of intake air 10 g/s (0.35 oz/s) or more
Estimated temperature of the rear oxygen sensor element Enable conditions at interrupt control are as follows 450°C (932°F) or more
Air fuel ratio reduced from target air fuel ratio Equal to Value of Map
Continuous time when rear oxygen sensor output voltage is less than 0.55 V 5000 ms or more
MAP SPECIFICATION

Output voltage of rear oxygen sensor (V) 0 0.1 0.15 0.3 0.4 0.5 0.55 0.6
Air fuel ratio reduced from target air fuel ratio (%) 15 15 5 4 4 4 4 4