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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 P2271 O2 Sensor Signal Biased/Stuck Rich Bank 1 Sensor 2 >> Outline Of Diagnosis

Outline Of Diagnosis

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Detect the stuck of rear oxygen sensor voltage in rich state.

Detect the stuck in rich state and judge as NG if rear oxygen sensor voltage remains above the threshold value for predetermined time.

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