Quote Originally Posted by 97GSRb18
switch them and see what happens if it says the rear one again then u know that, that O2 sensor is bad.
yea but the first time we did it it said the 2nd senser then when we replaced it,it went to the first sensor.that doesnt make sense if the first one isnt anygood then it would have read that the first sensor was bad from the start then when we replace it then it should read 2nd sensor right?