truck feels like it misfires sometimes when it’s cold so I decided to hook up the scan tool and got these values. The first sensor seems to be normal but sensor 2 constantly reads 99.06 What is the meaning of the 99.06 reading

 

I've seen that before in another thread. That's sensor 2 though, so, according to theory, it doesn't have much effect on fuel..... I haven't seen anyone publish "normal" values for that though...... PCM is actually adding a bit of fuel though. Rest of the values look reasonable.

 

From the Autoingenuity manual: "Post catalytic convertor O2 sensors may not report fuel trim. It may report as 99.06. In this case, you will be required to use only the voltage." So don't worry