I still have my code, but not the same one as you. Mine's a p0420 due to the primary cat (alytic convertor)being gutted as it fell apart a while ago. I haven't found until this morning a fix I would call both proper and cheap. More info on this at:
http://www.mkiv.com/techarticles/oxygen_sensor_simulator/

Argh, got to go to work.

If I had a hammer.....