Aren't these things suppose to last up to 100k miles? My ITR only has 20k on there, and I already need a new one. I'm talking about 20k non beating on miles. A bunch of normal driving, and some beating. Now I have to get it fixed, because it's causing my fuel to run lean. Does anybody know the life expectancy on an O2 sensor?

 

i doubt its your o2 sensor.
what mkes you think that

 

i was under the impression that a bad o2 sensor would make the car run rich to be safe?

 

check engine light would also come up

 

A bad o2 sensor will make your car run rich.

 

I know it's the O2, because it has that distinctive smell. Also, my buddy owns a garage, and he threw it under a scanner. The check engine light also came on. I was also under the impression that a bad O2 will make your car run rich. But my Air Fuel guage is reading lean, very lean. But it's all good now, it's running fine, and everything is fixed.

 

I had a defective cat and a defective O2 after 7k miles.

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