ok so my car has a check engine and it reads po430 cats bank 2, i know theres a thread on here about it but i still couldn't figure it, there are a total of three o2, two on the y pipe , and another one thats going in the floor board of the passagers side, witch one is bank 2 i only have one o2 and i wanna make sure i change the right one pics will help thks a lot my gas mileage is horrible and i can't afford to waste gas lol..

 

http://wiki.answers.com/Q/Lexus_v8_t...red_Thanx_Walt

 

It's not a o2 code it's a catalyst bank 2 below threshold code needs a cat or has an exhaust leak