I have changed the O2 sensor 2 times already... the first one was used and it sent me the same code like a month later, so i went out and got a new one.... well after two months the check engine light went on again and its saying code 1.... but after i start the car it just turns off and doesnt return till like a week later... what is wrong??? what can i do??
thanks

 

did ya reset your ecu......if ya had don't be mad cause i asked......if not look at the plug and see if it's broken in any way or pulled apart...if not then just chick all your main wire harness connections and then mve on to the ecu make sure the pins in all the way....if all thats fine get a multi meter and start checking the wires...may have a intermitant short in them

 

If your wiring is looking good, it might be because you're running very very rich, or you happened to spray some mean carb/choke cleaner in your intake manifold or something... I really doubt it's either of these though, but it's worth checking I guess.