jgilbs

I just pulled Codes and I have a P0430 (no SES light). I have a pretty severe exhaust leak (flange between B-pipe and muffler is 100% rusted through). Could this cause this code? Or not, because it is after the sensors?

I have read this code is due to bad pre-cats, and bad pre-cats can strain the engine causing engine failure. Where can I even find new pre-cats? I searched car-part.com but apparently they dont sell cats.

altezzablazes

no thats not the reason. p430 means pre cat close to the firewall is starting to lose efficiency. look up
"p430 code maxima" on google you will find quite a few threads.

Ghost_54

iTrader: (13)

P0430 is for bank 2 which is closest to the radiator
P0420 is for bank 1 which is closest to the firewall