This is the code that keeps coming up but turns off every now and then. Is this because of my tune or is it parts of my mods causing this? I was told from the dealer that something is dumping too much fuel and is clogging the cat and that is whats throwing the code.

 

you either have a hi flow cat, or no cat. that's what's causing it. it's not a big deal, it doesn't do anything negative. it's just an emmisions code.