You seem to have strayed far from "I drive a big truck because I need to haul heavy stuff", now you've moved on to "If I can't pollute as much as I want to, I c

You seem to have strayed far from "I drive a big truck because I need to haul heavy stuff", now you've moved on to "If I can't pollute as much as I want to, I can't make a living". A DEF code is not the only thing that can make a combine fail, and if you're one mechanical failure away from bankruptcy, it's not the DEF that's the problem.