O2 reading jumping around

[Wild_Dog]

I was able to hook a scanmaster up to my car today, most all of the readings were good. I did see where the O2 millivolts reading should be between 700 and 850 at idle, which it was most of the time, but every few seconds it will drop down to a 354 or a 114 then shoot right back up. Is this an issue or is it ok?
Thanks.

 

[garyk1970]

Thats normal....the oem o2 is a narrowband sensor...so it will bounce around..at idle the more up and down it reads the better..(shows o2 activity)....only concentrate on wot (me in third) o2 reading..it will be somewhat stready.i look for 770 - 820mv..hth...