[JasonBVHS]

I pulled the codes from my taurus and it came up with the error code P0156. according to my manual thats the downstream heated O2 sensor fault (bank2). My first question is, Is bank 2 the rear exhaust headers by the firewall? second is i replaced that O2 sensor, what may be the problem that is displaying that it is faulty?

 

[kodak_jack]

In my way of thinking, I think this is te O2 sensor near the catalytic converter as opposed to the one at the exhaust manifold (but I could be wrong).