yeah my o2 was all the way at the end of the DP and the exhaust stream was exiting pretty much everywhere but across the sensors pick up, and it was just reading the word LEAN(plx model) @ an idle, and i knew it wasnt. since then i have relocated the WB at about 16 inches from the turbo and it works well,

although my sensor burned out about a month ago, dont know if it was from the heat or the content of the mixture but they are only 38 bucks from VW