DPF Clean fail, car stopped working!

Keep_pedalling

Not everything that an go wrong with a car brings up a fault code for instance a blown head gaskets, broken pistons, or bent valves often do not trigger specific codes until the damage causes a misfire or sensor failure.

It rather sounds like there has been some major engine damage so you are looking at a potencial engine strip down to establish the issue. If you want this resolved you are going to have to pay for the diagnostics then pursue the company when you know what the problem is and what it is going to cost to fix it.

forgotmyname

Could be completely unrelated to the DPF clean like a turbo seal failing causing the engine to run
on it's own engine oil (diesel runaway).

Depending on how quickly they stopped it will depend on what damage was done if that was the issue.

Had a similar issue with a family members car, sitting in the passenger seat with my diagnostics laptop
I noticed the drop in turbo pressure and then the revs started to climb. Luckily it was a new clutch and
they managed to stall the car before the revs built too much.

Turbo shaft was in several pieces, I was only reading codes so nothing I did and nothing the driver
did either just good/bad timing.