For the life of me I cannot find what I should see as a reading for my rear O2 sensors. I'm using an ultra gauge, and I could have sworn they should read a very steady number like .445 almost all the time.
Anyone care to let me in on the secret? Before I tear the top of my engine off to replace the injectors. I'm running out of things in terms of getting rid of my 1174 & 1171 codes. Just don't have time right now to pull engine apart.

 

my o2 sensors are going bad too. Here is what my ultra gauge is showing

 

My rears are pegged out at 1.0 is that good or bad? I assumed good...

 

im not sure. I believe the voltage would be good.

 

I don't have any fault codes and my sensors switch every second, all the way up and down the scale.
if your number is holding at 1.0 then you have a problem.

 

You never said what your rear O2's are reading? You should have a steady number like you stated at idle. If they oscillate up and down like the front O2's, you have a bad cat.

 

These two responses seem to contradict each other

 

My response was to the OP.

 

I get that. But I quoted both your portions about what the 02 sensor reading should be. You said stable, he said not. It doesn't matter who the response was intended for, the advice applied to anyone reading 02 sensors. Am I right?

 

I for 1 would like to know how and what this oxygen sensor data is all about. I'm going to watch mine now and report back with numbers.