Thank you for your reply, the O2 sensor is a new 5 wire Bosch, I have replaced the plugs but how do I erase the adaptations, will disconnecting the battery do it?

I just changed the O2 sensor @ bank 2 location 1 (before cat)
cleared the codes. Now I have a code for bank 1 cylinders 1,2 and 3. Car is running rough and trying to compensate. I drove for some time with the O2 sensor not functioning.

I have tried both methods to reset my message center, neither seem to work. Is it diferent for a 2002?