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Home >> Subaru >> 2018 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) (3 Of 3) >> EFI System (FA20) >> DTC P2270: O2 Sensor Signal Biased/Stuck Lean (Bank 1 Sensor 2) >> Circuit description >> Enabling Conditions
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Enabling Conditions

Overlap prohibited DTC None
Battery voltage 10.9V or more
F/B operation condition In operation
Intake amount per second 10 g/sec or more
Oxygen sensor element estimated temperature 500°C (932°F) or more
The executing condition with interrupt control  
Duration while rear oxygen sensor output voltage is less than 0.55 V Less than 5 seconds
Air fuel ratio subtracted from the target air fuel ratio Value of map

Map

VOLTAGE SPECIFICATION

Rear oxygen sensor output voltage (V) 0.00 0.15 0.20 0.40 0.60
Air fuel ratio subtracted from the target air fuel ratio (%) 8 8 4 4 4