i got a 2002 accord 2.3 ltr 4 banger and i cant seem to get it to pass the smog test here in nevada. i just replaced the cat and the lower sensor on the car. and it is still throwing a code for the cat being bad. my question is do i need to replace the upper sensor as well?

 

What code!?

good luck

 

need a code, needs some emissions numbers, is it a dyno test or two speed idle test...yada yada yada.....