Sensor 2 is the rear sensor, and Bank 2 is Passenger side.
There is a short somewhere in the system, and frankly, the O2 sensor is the most likely place. That said, you should check the connections to see if they're loose.
Check for exposed wires near the manifolds to see if the heat shields or heat wraps have deteriorated.
Unplug the sensor itself and check it with a multimeter for continuity and resistance. If it fails, you've identified a bad sensor.
It would be worth replacing all of them since you're going to be in there if you indeed prove it has failed.
'09 PSM G8 GT - OPG Intake, DOD-Delete w/ Stage 1C 218/229 .600 Lift 117.5LSA, Kooks 1 7/8 Mids, Solo Axle-Back w/ X-Pipe, SuperPro Bushings (Front and Rear). BMR Sway Bars (Red)
"If you want to criticize someone else's work, be sure that your own is in order first."
Last edited by Jova007200; 02-22-2018 at 06:57 PM.