How can I un-clog my Vauxhall Zafira's diesel particulate filter?

My Vauxhall Zafira comes up with the warning light for the particulate filter, and a couple of times has almost ground to a halt. Will hard driving help and for how long? Is there a fuel additive that might help as a flushing agent or as an everyday addition?

Asked on 19 June 2010 by Phill12345

Answered by Honest John
Driving at a consistent 2,000 - 3,000rpm on a motorway should help it to regenerate. Short runs from cold will clog the particulate filter which is designed to collect particles on start up, then burn them off later in a car's journey. It won't burn them off if there is no 'later'.
Similar questions
I was interested to read your recent comments about certain vehicle models appearing to be DPF trouble-free. Is this because they have markedly different systems for regeneration of the filter, or some...
I notice you were yet to be made aware of any DPF issues with Mazda Skyactiv diesels so I thought you might like see the attached which comes from the May 2013 issue of Diesel Car. Are you seeing any evidence...
I have followed with interest your comments on DPF problems. I have not experienced these with my own 2009 Volkswagen 2.0-litre turbodiesel, although at 8000 per year I still avoid too many short runs....
Related models
Compact yet can house seven people. Rearmost seats fold into floor. More versatile mid-row seating than previous model. Excellent diesel auto.

Value my car