For the past week I been getting check engine codes. P0420, P0430 and P1000 I did some research and found out what they are and what not. My car currently has a BBK off road H Pipe and flowmaster catback. I also purchased a diablosport predator. I have the car tuned to my likings with the rear o2s shut off. Is there something I can do so these codes don't keep comming on? I tryed looking here and on sn95forums but I wasn't able to find anything. If anyone can help, I thank you.