try figuring out a code on a 4th gen f-body v8. 4 02 sensors, 75 bucks a pop just to figure why its getting "lean conditions on left and right oxygen bank". change all of them, reset computer, drive for 10 minutes, ses light, same thing. change the cats or go cat-less and get 02 sims or have a buddy with hp tuners erase the code from the computer