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Home >> Subaru >> 2017 >> Forester 2.0XT Touring >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (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

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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 ≥ 5000ms
OUTPUT VOLTAGE SPECIFICATIONS

Output voltage of rear oxygen sensor V 0.0 0.1 0.2 0.4 0.6
Air fuel ratio reduced from target air fuel ratio % 15 15 4 4 4