This code popped up with no other codes on my 2000 GTS. Efficiency for the catalytic converter on engine bank 2 is below efficiency, (passenger side?). When the car is driven it is driven, and not by a little old lady, so I'm wondering what is with this code and how to rid myself of it. Yes it keeps coming back so there is a real issue and I have taken it for a long drive at speed. Any suggestions would be greatly appreciated. P0432.