Been trying to hunt down the cause of my DPF regening so frequently, and I'm starting to suspect the MAF sensor. Car is a 2014 Forester 2.0 TD.
When I drive around home/work, I get about 70km per regen. It's mostly 80km/h with some 60km/h driving. The regen reaches 0%.
When I'm on the highway...
Just brought a Subaru Forester diesel and upon driving 300ks home with the car the DPF, Engine light and traction control light lit up.
DPF light flashed almost straight away.
Highway driving the whole way home sitting on 100 so no idea why automatic DPF regen never happened...