Ask Honest John

Most recently answered diesel particulate filter questions
I'm just about to purchase a 2007 Nissan X Trail 2.0 Dci, can you tell me if this model is fitted with a dreaded DPF? I believe that the 173bhp versions have one, but not sure about the 150bhp models...
I am thinking about buying a used Jaguar S Type 2.7 Diesel with manaul gearbox if I can find a good one. Is this car a sensible used buy, and can you confirm whether any of the early models were in "pre-Euro...
I have a second hand 307 Peugeot which I bought last year June. Last week I let the fuel level run very low and due to this the "Antipollution fault" light came on; and caused the car to jerk. The warning...
My 2010 Mazda 3, 2.2 diesel 185 bhp Sport can return 60 mpg on an extra-urban round trip of say 10 miles or so but should i make a few stops on the way, the fuel consumption goes up like there's a tap...
I have run a 2010 D3 Volvo XC60 auto for 30 months now on mainly short journeys with no DPF problems. I am thinking of changing to a new D5 manual. Is there any difference in likelihood of future DPF problems...
I have a Fiat 500 Diesel car, which is currently having white smoke coming from the exhaust. It is also over revving and the DPF warning light has come on a couple of times now. It is also asking for an...
I had my car - a Volkswagen Jetta 1.9TDI DPF - transported to St Helena and now it never exceeds 30mph. Following short trips the light on dash has come on. We have no sophisticated diagnostic tools so...
I have owned a '58 Kia Cee'd CRDi GS from new and have covered 39k miles. My annual mileage is decreasing yearly and is around 8k. I am very happy with the performance and economy of the car but would...
I have driven my Laguna DCI GT for 12 months now and never seen the DPF regenerate. I have been told by my local Renault dealer that it only regenerates when the sensors detect it has become 50% blocked....
My engine managment light as come on in my car and it says on my dash "antipollution fault." It's a Peugeot 307.
 

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