Ask Honest John

Most recently answered dpf questions
I have a 2015 Volkswagen Transporter T5. The DPF warning light has come on four times since last December. I do a lot of short journeys, but try to do a long journey once a week. Three weeks ago I travelled...
My son purchased a 2014 Mazda CX-5 2.2d with 27,000 miles on from a Mazda dealer. It cut out at a roundabout and would not start and the Engine Management light was on. It was towed back to the dealer,...
My friend has ownes a 10-plate Kia Soul diesel automatic for years, he drives around town all the time and never has any DPF problems, so he thinks that his car does not have one, but I think it does....
I just had my car plugged into a diagnostic computer at a garage and the mechanic said the DPF is blocked. I asked if it could be regenerated, but he said it needs replaced. Does £900 to replace it sound...
With regard to the new MoT changes for diesel cars with DPFs, how can I go about keeping my DPF clean? I have a 2017 Ford Grand C-MAX 2017, which I usually use car for city runs. It doesn't get much use...
I'm a delivery drive. Could you recommend a medium-size van with an automatic gearbox, please?
Our car's DPF is blocked. I've have tried regenerating it by running it down the motorway, but it's had no effect. Is there anything else I can do?
I do approximately 13,000 miles a year and quite a lot of motorway driving. I've seen a good deal for a 2016 Skoda Octravia vRS 2.0 TDI with only 2000 miles on the clock for £17,000 with a main dealer....
I have a 2008 Volkswagen Golf 2.0 TDI. It is not fitted with a Diesel Particulate Filter (DPF) as standard so how will the May 2018 MoT changes affect this type of car?
I read in a recent 4x4 review that the engine oil is quickly contaminated by the DPF. Is this the case on all diesel engines with a DPF, and can it affect the life of the engine?
 

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