Well, you know what to do about P0136 and P0141. Put a Bank 2 Lower O2 sensor back in.

As for P0455, check for loose fuel cap first.
Then read this TSB for other suggestions.
http://www.v8sho.com/SHO/DTCCodeP0455.htm

"Always do the cheap and easy ones first." 1996 V6 ATX 96K miles