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Home >> Subaru >> 2019 >> WRX Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (Except For STI) (1 Of 4) >> Diagnostic Procedure With Diagnostic Trouble Code (DTC) >> DTC P0140: O2 Sensor Circuit No Activity Detected Bank 1 Sensor 2 >> Diagnostic Method

Diagnostic Method

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

Malfunction Criteria Threshold Value
Secondary oxygen sensor signal (B) < 0.375 V

Time needed for diagnosis:  1 second

Malfunction indicator light illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.

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