Ask Honest John

Most recently answered dpf questions
I had the DPF and thermostat replaced in my 2004 Focus by my local FOrd garage six months ago at a cost of £1800. A warning light has now come on and they have told me the fuel additive tank is empty and...
What is the newest non-DPF A6 I can buy. I am hoping for a 2.7 or 3.0 TDi Quattro. Would you recommend Auto or Manual?
I currently drive a BMW 330d E90 LCI model. It's done 86k and am now beginning to wonder how long the DPF will hold up. It's run exclusively on Shell V Nitro and serviced every 10k (oil, air filters etc)....
I have just had a fault light come on the dash of my Passat CC and a message saying diesel-particle. Would you have any idea what this means , as the light stays on while driving?
I own a 2009 Volkswagen Passat 1.6 TDI BlueMotion and recently I realised that the fuel consumption has increased considerably. I used to do 49 mpg easily and now I struggle to do 42mpg. Last week the...
My DPF will not regenerate. I have tried forced regeneration in the garage, but it still won't budge. Should I replace with dealer parts which are very expensive. I could replace with a cheaper version...
Last year I had to have the DPF replaced at a cost of around £900. In light of the Volkswagen scandal, is it likely I will be able to claim this back? After receiving a letter confirming my vehicle is...
We have just bought a 2010 (10 plate) Kia Sportage with only 15000 miles on the clock, but we cannot find any specific reference to a DPF being fitted or to a warning light on the dashboard. Will it have...
I am now 70 and looking to the future I am thinking of buying a compact SUV for easier access. Looking from these cars - Skoda Yeti, Kia Sportage, Hyundai ix35, Audi Q3 and Nissan Qashqai - do they have...
The DPF warning light appeared on the dash for the first time with no other issues at all with car. I checked with my handbook for advice which l followed to the letter reset the regeneration system but...