P2459 DPF Regeneration Not O.K
Performance loss after a few miles driving.
Cycle key off & restart vehicle, Performance restored. Management light comes on when performance is lossed & will stay on. After a few driving cycles management light will go out on own accord & then the symptoms will repeat from the start of this paragraph.

DPF soot saturation reading seemed very high at 150% & after a few manual regeneration attempts the figure reduced drastically to 50%

No sign of any intake or exhaust leaks!

Sadly have no forced regen feature to use on various scan tools i have.

Any pointers?