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Home >> Subaru >> 2016 >> WRX Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Diagnostic Trouble Code (DTC) Detecting Criteria (H4DOTC) (WRX) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> 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 ≥ 10 g/s (0.35 oz/s)
Estimated temperature of the rear oxygen sensor element ≥ 450°C (842°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 0.55 V ≥ 5 s
VOLTAGE SPECIFICATION - MAP

Output voltage of rear oxygen sensor V 0.00 0.10 0.15 0.30 0.40 0.50 0.60
Air fuel ratio reduced from target air fuel ratio % 15 15 5 4 4 4 4