New to this section of the forum but, My sister inhereted a 2002 3.5l intrepid. It had the CEL on so i scanned it and it said P0430(bank 2 cat efficency). i reset it and checked out a few other things on the car as well as replacing the battery. When i restarted it it came up with code p0056(bank 2 sensor2 o2 sensor) I called my uncle who said he had takin the car in to try to repair the problem and he said a mechanic had already replace the ecu and all of the o2 sensors and that it needed new cats.
My first question is Bank2 sensor 2 is the drivers side o2 sensor ,correct?
i already ordered a new o2 sensor so ill replace it. as long as im sure wich one to swap.
Thanks in advance for the input.

 

Bank 2, sensor two is rearward of the cat on the passenger side...

 

thanks..ill swap that out frirst and see what it brings me.