replace catalist bank 2

Question

I have a Honda accourd and I need to replace the catalyst system efficience below bank2 tell me if I have to replace bank 1 too and sensor 1 and 2. thank you

Answer 1

P0430 Catalytic below efficiency Bank 2

Use the scan tool. let the scan tool decide

 A good front 02 sensor would cycle lean to rch,here a good cycle from lean to rich, this is what make the catalytic convertor work

 A catalytic convertor 02 sensor (downstream)  should read above 0.650 volts.and stay above 0.650 volts,