I was having some trouble with a code P0420 which is for the bank 2 catalytic converter. I did some more digging and tried using the live data to read the O2 sensor readings and both my upstream sensors (O2S B1 S1 and O2S B2 S1) were reading a little over 3 Volts. However my down stream sensors were reading correctly between 0.1V-0.9V. I was wondering if there is any other live data I should take a look at to help me figure out what the problem really is as my OBD2 scanner does give me a lot of info. If anybody knows what I should be checking and the correct readings it would be very appreciated.