That's funny you mentioned that my aem o2 sensor was fine when i pulled it off, do to problems motor wise, and put it on a friends car who was having problems and my sensor would do this. It would only read 14.6-14.7 or when you let off on the gas it would go to 15.3 then go back to 14.6 and just stick there no matter what you did to the throttle. The reason we put my sensor on his car was because his aem sensor started to just read lazy and most of the time wouldn't go richer than 13.0. Which could be a whole nother problem. We switch both cables and guage and no matter what we did it would do the same thing with each sensor. His lazy and mine fixed. Under 6 months old also

 

On another note, we have seen great longevity out of the PLX units, and are pretty dead on with the dyno's WB

 

For the people recommending the PLX, has anyone verified its accuracy? This test shows it was the least accurate. I have hondata though so it seems like its the unit I should go with?