When these O2 Eliminators are fitted, do they merely stop the warning light from coming on, or do they actually decommission the sensors. When Eliminators are fitted, does the ECU keep looking for a sensor reading, if it does, what does it do when it can't get a reading?

 Why would you want to do that to a 2015? The bikes can be tuned very well with them in the system. I have only seen ''O2 eliminators'' on up to 2009 myself, and on those I have reconnected the O2 sensors and tuned them with SERT, TTS or Supertuner Pro.