Around 160k is when our 2007 6.7L emissions system started crapping on itself.
Black smoke, sluggish response, codes thrown, etc
EFIlive, delete with new mrbp exhaust, and runs like new... no smoke & moar power

But I don't remember what codes it was throwing

Turbo cleaning may buy a little time, but eventually the only fix will be new cat & dpf... look up what those cost!