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Home >> Subaru >> 2018 >> Crosstrek Base, Standard Trans >> Repair and Diagnosis >> 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 >> Execution Condition
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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
5 s or more
Air fuel ratio reduced from target air fuel ratio Equal to Value of Map

Map 

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