Because the DPF is under the car, not ‘close coupled’ in the exhaust manifold, the car needs to be driven quite a long way (50 miles) at 2000 – 2500 rpm to get the DPF hot enough to promote a passive regeneration.
2140 posts · Joined 2011. #3 · Jan 18, 2016. There are three types of regeneration: passive, active and forced. Actually four types, if you count replacing a irreparably clogged DPF with a new one. Passive regeneration takes place during normal driving but, due to the high exhaust temperatures needed, usually only on long or high speed runs. PNVSXN. 424 140 160 266 207 51 81 459 417