For the good of the board members who may have this code pop up...it is for the Bank 2, downstream oxygen sensor located near the oil filter housing. My dealer wanted $379 to replace (after a $99 diagnostic fee). Thankfully they did not have the part and I was able to change it myself. I purchased a Denso 02 sensor at Advance Auto for $58. The guy at Advance also confirmed the code for me. I lucked out as the sensor broke loose easily and only took a few minutes to change.