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Home >> Subaru >> 2018 >> WRX STI >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (4 Of 4) (STI) >> 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)
Estimated temperature of the rear oxygen sensor element ≥ 500°C (932°F)
   
Enable conditions at interrupt control are as follows  
Continuous time when rear oxygen sensor output voltage is less than 0.55V ≥ 15000ms
Air fuel ratio reduced from target air fuel ratio ≥ Value of Map
OUTPUT VOLTAGE SPECIFICATION - MAP

Output voltage of rear oxygen sensor
(V)
0.00 0.15 0.20 0.40 0.60
Air fuel ratio reduced from target air fuel ratio
(%)
15 15 4 4 4