DTC P0140 O2 Sensor Circuit No Activity Detected (Bank1 Sensor2): DTC Detecting Condition

WARNING: This page is about a different car, the 2012 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.

Detected when two consecutive driving cycles with fault occur.
GENERAL DESCRIPTION Refer to DTC P0140 O2 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK1 SENSOR2) , Diagnostic Trouble Code (DTC) Detecting Criteria.
CAUTION: After servicing or replacing faulty parts, perform Clear Memory Mode Refer to , OPERATION , Clear Memory Mode., and Inspection Mode Refer to , PROCEDURE , Inspection Mode..