2001 Pathfinder p0140 code

[Gibbon]

DTC code P0140. My code book says O2 sensor circuit no activity detected (bank1 Sensor2).

Where is this sensor located?.

Any tips on replacement.

Thanks

[180fan]

get an o2 removal socket. It looks like a deep impact socket with one of the sides cut out. Look along the exhaust manifold.

[tonynalli]

or just use a 3/4 in wrench and use the box side and have more leverage...