why?? they dont fail that often let alone fail all at once

what is the code????

Roy

i went to autozone and the guy said that it had 4 codes knock sensor or oxygen sensor and they say that my car has 3 oxygen sensors and 2 knock sensors and i was going to replace them all thats why i wanted to know

what ones do i need 2 downstreams and 1 upperstream or left and right upper and 1 bottom please help me out

first of all, autozone are parts salesman not techs. i would not take there word for anything

i still need the numbers as requested. then we can further help you

Roy