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Home >> Subaru >> 2018 >> Forester 2.5i, Automatic CVT Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (P2101 To U171F) (H4DO) >> 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)
Estimated temperature of the rear oxygen sensor element = 500°C(932°F)
Enable conditions at interrupt control are as follows  
Air fuel ratio reduced from target air fuel ratio = Value of Map
Continuous time when rear oxygen sensor output voltage is less than 0.5 V = 15000ms
VOLTAGE SPECIFICATION - MAP

Output voltage of rear oxygen sensor
(V)
0.0 0.15 0.2 0.4 0.6
Air fuel ratio reduced from target air fuel ratio
(%)
15 15 4 4 4