Running extremely lean

[playitlouddsm]

Ok well while driving today i noticed that on dsmlink it said i had an a/f ratio of 18.00. I have all my fuel setting zeroed out, so i'm not quite sure why it's running so lean. Also my O2 reading on dsmlink is saying that its 1.10V WTF I thought that the higher o2 voltage reading ment that i was running rich, but then the a/f ratio is telling me i'm running crazy lean. Anybody have a clue what might be going on?
Thanks -Nick

 

[RedRain]

Does this happen at all times or just when the car is warmed up?

 

[playitlouddsm]

This is happening at all times. O2 is always at 1.1 v and a/f is always reading 18. Could my O2 sensor be shot?

 

[RedRain]

It looks like it might be bad, but I bet there is a way to test for Resistance or something before replacing it. How old of an 02 Sensor is it?

 

[playitlouddsm]

Alright after a normal drive tonight i noticed that while logging my A/F ratio would richen up every time i shift, but then go straight back to 18. Along with the a/f spiking everytime i shift i also log about .4-.7 counts of knock at the same time too. My o2's don't move from 1.1v at any time. Any ideas?