I had a warning that my DPF was full and the car was in "limp" mode. (3 litre F Pace Sport, 45000 miles).
After a DPF doctor check, the Data and codes came in at only 20% full, which should have been cleared by a forced DPF clearance run. After a clean out and resetting everything, the car ran for another few hundred miles and went red again showing DPF problem and into "limp" mode.
A second visit again showed less than 15% soot in the system, but this guy suggested a look at the throttle box, as this can jam open affecting the turb, as the internal plastic housing can deform due to heat.
Sure enough, the butterfly valve was jammed open. It's a common problem apparently.
I had a new throttle box and exhaust pressure sensor installed at Jagutek near Ely, and 3 months and 2000 miles on everything is OK.....
£600 for a new box and sensor versus £2000+ for a new DPF unit......!!!! Thank you DPF Doctor number 2 !!!!