[dj karl-r]

I am getting codes p0420 and p0430 I know what the codes are and cleared them but after about 100 miles they come back. I have a full exhaust with test pipes but have anti foulers on the o2 sensors should i still be poping these ses lights. any suggestions for my 05 roadster. would this also cause the vehicle to run lean at all???

 

[toykilla]

http://www.350z-tech.com/forums/index.php?showtopic=6645

P0420 TW (Two-Way) Catalyst System, Bank 1
P0430 TW Catalyst System, Bank 2

I get the same on my 04.. i need to do something about it..