P0133 Pontiac -vibe 05 awd

Question

i've changed both o2 sensors and my girlfriend is pissed off at me to the point that she broke up with me,please help.i get 2 codes p0420,p0133.i took the exhaust system off and checked the cat and its clear.no blockage or carbon build up.do i need to get air-fuel ratio sensors from toyota instead of aftermarket ones?or do i have a fuel pump issue?

Answer 1

P0133 02 sensor circuit slow Bank 1 Sensor 1

You will have to replace it with a dealer item, If there no correction use TSB # 09-06-04-008B,this deals with reprograming the PCM.