I was having misfires and really bad performance with a 2011 Caravan 3.6. I found the upstream bank 2 sensor voltage was static so I replaced it. Engine light is off now and seems to be performing OK. I did notice bank 2 and bank 1 are opposite. Still within spec of +/- 10% but if bank 2 is running a bit rich, it could have caused the sensor failure. (Keeping in mind I've hit 120K) Video of the data stream after install and driving around until temperature.
Thoughts?

E