Automotive cummins 2015 6.7L in a ram

[RickatGL]

The truck is bone stock no tunes, all systems functional. True I have no idea why the shop is saying turbo failure. Like I said i assume it's the actuator sticking. Far as I know.there was no faults. One of the drivers took it out, truck had a derate code, dropped it at the shop, they changed a dpf sensor of sorts. Another driver picked it up, then it showed a derate counter, so they brought it back to shop, where they told me the turbo is shot. That's all I know, I can check what code sensor they changed but I'm fairly certain it was somthing to do with dosing. one.