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Home >> Subaru >> 2019 >> Ascent Limited >> 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
Sub feedback
Amount of intake air
Estimated temperature of the rear
oxygen sensor element
Enable conditions at interrupt control are as follows
Air fuel ratio reduced from target air fuel ratio
Continuous time when rear oxygen sensor output voltage is less than 0.55 V
10.9 V or more
In operation
10 g/s (0.35 oz/s) or more
450°C (932°F) or more
Equal to Value of Map
5000 ms or more
VOLTAGE DESCRIPTION - MAP

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