I am at my wits end when it comes to my O2 sensors. Here is the problem, my left side o2 sensor is reading .449 (dead) and my right side is reading rich. I have switched the two o2 sensors from left side to right side and the problem seems to follow a bad sensor. So I go down a by a new right side o2 sensor and guess what is still happening, the left side o2 sensor is still reading .449 and my right side still is reading rich. But if I take my right side o2 and put it in the left side o2 bung the problem goes to the right side. Does anybody have any idea as to why this is happening? The car is a 1995 Trans am m6.

 

did you burn up some wires?

 

Did you reset the PCM after the change?

 

do i need to reset the pcm after doing somthing like that.

 

tha wouldnt make sense becasue i put the righ o2 sensor on the left side and it works just fine. but if i put the left o2 in the left o2 bung it doesnt work just reads .449

 

The wiring is probably burned through. A couple minutes of searching should reveal the problem.

 

i guess im not making this clear enough. how could the wiring be burned up if i put the right o2 sensor on the left side and it works. but when i put the left o2 sensor onm the right side it doesnt work. the problem if following the o2 sensor but i have allready bought two brand new o2 sensors.

 

How are you testing them? What are the conditions around your test? engine running, O2'a are at temp? PCM is in closed loop?

 

im testing it through my scanmaster and i am running for about five to ten min. each time.

 

any body have any idea?