Anyone out there with PPE header experience P2A03 or P2A00? I had this same code with test pipes but assumed it was an exhaust leak from a warped flange. I'm stumped where to go from here. I'm positive it's not leaking at the y-pipe/header. Could it be a bad sensor? Seems like that's never the fix.

Is there anyone running these without a code and without disabling the o2 sensor? That would make me feel like there is a fix outside of going back to stock.

 

Maybe a tune will help

I have art test pipes with a tune and no codes

 

Im already tuned. A lot of times the tuner will disable the o2 sensors to remove the code. The problem with that is you cannot pass a smog.