Ask Honest John

Most recently answered diesel particulate filter questions
I have recently bought a 2009 Vauxhall Insignia 2.0 diesel. However, it gave me DPF errors today and started using lots of fuel. I have asked my local garage to remove the DPF, but been told that it can't...
I do about 12,000 miles a year, mostly short runs with occasional motorway long hauls. I know most (if not all) modern diesels have DPFs which can give problems. But I like diesels because of the relaxed...
I have a seven year old Volkswagen Passat CC. It has covered 140,000 miles and had no issues until now. The last two journeys, of approx 200 miles, the engine has 'missed', only for about 20 seconds each...
My 2013 Mazda 6 diesel recently had a low oil pressure warning light come on. I stopped driving immediately and got towed to my Mazda dealer. They changed the oil and said it was contaminated (they didn't...
My wife and I are in the market for a second hand estate; we want a car that's three to five years old and costs up to £10k. We are happy to have a fairly high mileage car (up to circa 100k). We've just...
Can you clarify the situation regarding DPFs? What would happen if a used car was bought from a dealership and subsequently (after two years) found that the DPF had been removed? Could the dealership...
I have a 2013 Volkswagen Touran 1.6 diesel with 13,000 miles on the clock. Recently the car has been giving me some problems. A while ago it was emitting a strong oil smell, which turned out to be a split...
I have always had petrol engine cars myself, but my dad has recently purchased a 2010 (60) plate Volvo C30 D2 (1.6 diesel engine, facelift model, R-Design) from a car supermarket. It has around 54,000...
Six months ago I bought a car from a well-known dealer for £10,000. It had done 30,000 miles when I bought it and I took out a warranty for three years. The clutch went after two months which they replaced....
Our Citroen C8 2.2 diesel (2008 model) has developed an intermittent loss of power, which triggers the engine management light to activate and a DPF filter fault to be displayed on the dash. Our local...