I have had both my turbo and EGR valve replaced due to recurring MIL codes being thrown. I have not had any repeats on the P2262 or the egr codes since the replacements, however I still get the P2000 code every week, even after a dealer clear. Anyone have a clue to why a NOX efficiency below threshold code is still being indicated? I'm getting to the point I don't even call the dealer when the light comes on anymore.