LAst night after driving for about 5 minutes, my check engine light kicked on. When I got home, I parked it in the garage and went out to jump the service connector to get the code, and the ligth would not come on again. I have driven it for probably about 1/2 hour since then, and no check engine light.

I was htinking it was my 02 sensor, because I've been having some really weird fuel mixture problems lately. My a/f gauge will read int he middle of stoich at WOT. After the car has warmed up, tiwwill still rad there. But a few minutes after I've hit normal operating temp (a period of time after its warmed up fully) it will begin to go green at WOT. The evening that the check engine light came on, however, it failed to hit the green area (on my A/F gauge) after warming up long enough.

Does this sound like a good diagnosis, or something else perhaps?

 

yeah my teg is doing the same thing, so i ran the code and came back with the same results i am pretty positive that its my o2 sensor, because i am running really rich after warm up, and the light has only came on twice and its been while driving on toll roads to work in the middle of the day, so i turn the car of while i am driving and turn it back on and the light is gone, so thats my theory
good luck let me know if you find anyhting else

 

what code came back? Or did your light not come on to give you a code?

 

first time i think code one but its kind of inbetween so i am pretty sure its o2 but second time i threw no code and the third time i think it might be more than one code, u go through the two prong plug right?

 

Your diagnosis of the O2 sensor sounds correct but also do a little preventative maintennance on all the under hood electrical connectors. Bad connections caused some intermitant CEL codes on my car.

Just get some electrical connector protector goo from Pep Boys or something and smear it on all the contact points on the connectors.

Mike

 

For anyone who was wondering, changing the 02 did the trick... difference was night and day