I have been having this strange problem lately. My first O2 had around 20k on it. I would get to the top of this hill going home 2200' and it would just start bucking and stumbling, check enging goes on and it doesnt want to make it up the hill. I would get down the hill and it would be fine again. So the code was 02. I JUST bought a new one, I have had it on for about 1 week and now the car just did the same thing AGAIN on the way home. I was thinking maybe the MAF had something to do with it?

I have never experienced this and dont know what else would make the O2 trip out.

 

I would check all the connection to the sensors,injectors,etc.for corrosion[Green crap]

Might just be a bad connection on one of the sensors....Plus its a free fix if you find the culprit....

 

02? Wassup? My chilton crap starts from 11...

 

He probably meant the code he got was for the o2 sensor.....

 

1. always possibillty of defective sensor
2. something shorting out the o2?
3. corossion possible as previously stated.
4. leak in exhaust causing premature death.
5.

 

i wanna say some sorta short some where if its only when you go uphill maybe the steepness is causing it to be disconnected somewhere.

 

Only on that hill? Not any other hills or at any other time?

 

I had a broken O2 sensor harness before on my car and I replaced it, now my car uses more gas than before. Why??

 

yeah, it is REALLY weird. I climbed another hill yesterday that seemed ALOT bigger than this one and it was fine.

 

I would move...

 

I'd drive around it