Ask Honest John

Most recently answered diesel particulate filter questions
How often should DPF regeneration occur? I bought a new Vauxhall Corsa in November 2012, 2 days after having the car and only driving about 10miles the DPF light came on. Most of my journeys are short,...
I have a Nissan Pathfinder 2.5 TDI, first registered in March 2006. Does it have a dual mass flywheel and DPF?
I'm looking to purchase new vehicle and was curious about the new Honda Civic 1.6 diesel - in the Honda dealership I was told that even though I only do a majority of short journeys and a maximum of 10,000...
My Ford Kuga is 3 weeks old and has 874 miles on. it now has an Engine Malfunction light and the car will not exceed 40 miles an hour. It has been back with the dealer for eight days and they do not know...
I have just bought a 2009 Ford Focus 1.6 TDCI Style 90. There is no mention of a DPF on any of the documents I have. Please could you advise, as there is so much conflicting information out there?
I have a Peugeot 307 SW HDI, bought new, 2002 or 2003 (not ex fleet!). 83,000 miles. I know the DPF needs dealing with but can a local service centre clean the filter as I certainly don't want a Peugeot...
We have decided to change our Zafira GSI and have just ordered a Zafira Tourer 2.0 CDTI. I read your column at the weekend and the diesel particulate issue cropped up, causing me great concern around £2000...
Does this engine have a diesel particulate filter?
Currently looking to replace a 53 Plate Mazda 6 with a similar car. Have found a local Mazda 6 2.2d TS2 with 35,500 miles on clock. I do around 12,500-15,000 miles a year. We have driven the car and...
I would like to buy a nearly new Kia Sorrento or Hyundai Santa Fe automatic - I do about 11,000 miles a year, with some regular 150 mile runs. However I am aware of the DPF, DMF and EGR problems you have...