TTS-Do I have a bad O2 sensor

[Merc1100sc]

Tuning my bike with a TTS. I notice in the data master histogram the rear O2 sensor is not toggling between on and off at all.
I also notice the rear is reading some voltages way out of what I believe should be the correct spectrum. As high as 1300mV.
Should I assume this sensor is bad? Anyone to confirm using the TTS?
Bike is an 06 dyna.

Thanks

[2-Piece]

Sounds iffy, you could always swap front and back and see if it behaves the same.

[Merc1100sc]

Yes,

AS much as a PITA they are to swap put I was thinking about trying that. Just figured I could tell with the TTS if one was definitely bad.
Thanks

[longshooter]

Merc
Sorry for the late post but just saw this. Temporarily induce lean & rich conditions while monitoring TTS data. If you see no change, then the O2 is probably dead. Bear in mind that doing this will also affect the front O2.

longshooter

[Merc1100sc]

Thanks for replies guys. Upon swapping the sensors front to back I noticed the rear was loose. I swapped them anyway and its seems fine now. The mV of the sensors seem to be jumping around quite a but which leads be to believe they are good.