Proform 850 dialing it in closer

Well it's fighting me!
before i stopped the recording o2 was stuck at 11.5 rev up or down nothing happen.
o2 stopped reading..........have another one to install
Computer said that it couldn't read memory card removed and installed another port. Read but recorded Nothing as in 0 Data GRRRR
reinstalled back into data logger, hit record, o2 started reading again. revved it up several time. remove memory card. computer reconsidered and show the recording..............

Any way just a little venting while exh is cooling so i can replace and calibrate new o2 sensor.