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Home >> Subaru >> 2020 >> Ascent Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (1 Of 4) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0140: O2 Sensor Circuit No Activity Detected Bank 1 Sensor 2 >> Outline Of Diagnosis

Outline Of Diagnosis

Detect the open circuit in the rear oxygen sensor.