Hello All ! my CRossfire has been doing the same thing , Work on one Sat. Un plug all O2 sen.and clean the plugs out , cleaned the mass air sensor , and did not give a code for about two weeks ,But it back now . will take it in a week or so , but before i do i;m going to change out the o2 on bank 2 and see what happen ! got o2 off ebay for 60.00 Will let you know what happen.