My intention was to replace Bank 2 Sensor 2. I only replaced the post cat sensor on the right hand/passenger side. I did make sure that the connection is tight. Did I do the wrong side. I thought I had read that Bank2 is the passenger side, but now I think I got that wrong and it is actually the driver side that is Bank 2. Do I now have egg on my face? Thanks for all of your input. I'm determined to get this done right.

 

ummmmmmm i think you have it right, but also i think you need to replace the primary o2 sensor. the precat one. thats the one thats going to fail first

 

As far as everything I have read B2 S2 is drivers side post Cat....I am having the same problem and same code and just changed the O2 and still have my CEL on....

 

Unfortunately, getting the codes read at the local auto supply shop didn't give me specific enough information. So I brought it to a shop that specializes in German cars and they found that it was not one, but two sensors where the internal resistance was too high. So I've ordered the new 02 sensor from advance auto and i'll see if it's finally solved.