Had the exact same code tonight. Had a long drive today with only a bit of rain. Check engine light came on at the end of the drive as I was leaving Advanced Auto, ironically.
It's Bank 2 Sensor 2 as well.
This was my first long drive with a K&N air filter which I oiled heavily before putting in. More than likely that's the case but I'll need to find the sensor and clean it. Engine's running fine.
I am getting a weird gurgling noise when I put the key in acc position with the engine off. Noise is from the rear of the vehicle and last about five seconds. Has something to due with the fuel. I'll chalk that off as the Amsoil fuel treatment I'm trying and have a fuel filter on standby.
I've cleared the code and if it comes back after I clean the sensor, I'll report back what the fix is.