k well im really confused with these things, my long term fuel trim on bank 2 is high running at about 20%(wich i know is lean) bank 1 is running at about 2% my two front o2 sensors r running properly from .2 to .8 the back 2 r diferent bank 1 is sweeping from .2 to .8 and bank 2 is at .7 and rarely moves,but both have a trim of 99.25%. i assumed the b2s2 was done so i changed it and nothing changed, (what a pain in the &%$) the threads staying in the catn a ten minute job took three hours, needless to say the next time that o2 sensor has to come out its gonna be a hole new cat,LOL any help would be nice ive been searching the internet for ever and all they talk about is the 2 front ones!

 

anyone?