ok so i was getting the famous p0420 and p0430 codes on my 2005 t4r v6 so i decided to go ahead and just replace all o2 sensors and a/f sensors. i installed the two post cat sensors and i was getting two codes still a p0174 or something like that and then still the p0430 so i figured it would go away after doing the pre cat sensors. so i finished those up and i am now getting a p0420 code. i cleared the code thinking maybe if i clear it that it wont come back but it did. any thoughts?

also im not sure if i am covered by any emissions warrenty or anything being it is 6 years old and i have 107,000 miles. the tsb for sulfur smell was never done either. does anyone know if i can still have it done or if im under some kind of emissions warrenty?

Just doing a quick internet check, it looks like the emissions warranty is only 8 years/80,000 miles, so I think you're on your own.

yea thats what i was reading when i google searched. i was hoping someone else might of had some more info. but thanks for the reply!