So I've searched on this and it says that the reading on bank 1 post cat is bad.
I replaced the o2 sensor and plugs. The only other thing I can think of is the mini cat...which should be under warranty for 2k more miles.
Is it possible or probable that because I just started running 33s on 3.73s that the engine is running too lean causing a bad reading?
Just want to exhaust all options before taking it to the stealership.