04 intrepid o2 sensor 2/1

have engine light 152 changed left bank down stream o2 sensor still code comes up i will check wiring ,...but is this a coman code??

forgot to say i changed o2 sensor and where is bank 1 and bank 2 i think i changed the wrong O2 sensor
code P0152 2/1 sensor bank 2 sensor 1???

Bank 2 is the drivers side. Upstream sensor before the cat.