Code 2002?

[Shoalwater]

So I had my Banks Monster Exhaust installed yesterday morning, and today my truck throws the above code. I took it to the dealer and the told me the code and that it was something about dpf or cat below efficiency or something like that. They are blaming on the Banks DPF back exhaust. My question what is this code exactly and what should I do?

[MississippiJoe]

I believe the cause is the engine is flowing more air than it is accustomed to.

[08stroker250]

You will get that code until you delete the DPF

[Shoalwater]

Consider it deleted, I am ordering my delete pipe tonight, but still can't decide on SCT with IDP tunes or spartan. The trans issues I have been reading about with the Spartan are starting to make me lean toward the SCT TSX. One quick question should I order the 4" delete pipe or the 3.5" pipe? Will the 4" slip right into my Banks DPF back exhaust?