I brought my diesel in to findlay to have them reprogram the DEF. They did, and 100 miles away, the DEF system malfunctioned again. Towed it back to them and they sold me a $1200 NOX sensor. (BTW, Google that-- it should have cost about $450). 100 miles later, the DEF system malfunctioned again. Of course, they wouldn't admit that nothing was ever wrong with the NOX system, and they certainly weren't refunding it or taking any responsibility. They "repaired" the DEF system, and 100 miles later, for the THIRD time, the DEF malfunctioned. My mechanic fixed it.
I've bought 2 vehicles from this dealership. There won't be a third.