The check engine light on my 1996 A4 (2.8v6 engine) came on last weekend. I pulled the code and checked it in my Bentley manual and it told me "P0150 Bank 2 Sensor 1 malfunction". Very enlightening! Does it mean one of the oxygen sensors is bad? If so, which one? Can anyone interpret for me? Thanks Vic Norman 1996 A4 2.8