Ask Honest John

Most recently answered diesel particulate filter questions
I have a commute of eight miles a day, five days a week. Over the course of a year, I cover 8000 miles and I rarely do journeys of more than 10 miles. Will a new Nissan Juke 1.5 diesel be suitable for...
I own a small florists and am after a van to do deliveries with. I'm after something stylish but doesn't need to be big. What do you suggest?
My Vauxhall Insignia emission filter light is constantly flashing. At first the light came on with 'code 55'. I researched this and did as advised by driving over 2000 revs to clear it. The code 55 disappeared...
My 2010 BMW 3 Series diesel has done just over 30,000 miles and the engine function light (Orange) is displayed intermittently. My Independent Garage has run a full diagnostic test and is not really sure...
I have an intermittent fault with my Audi A6. The Emission Control light comes on and goes off randomly. It all started in October where I had to do a lot of short journeys. But most recently the light...
I've removed the DPF and EGR from my Vauxhall Signum, due to constant engine problems. Is the car legal if the model is pre-2008?
I'm tempted by a 2010 36k Qashqai 2.0-litre diesel with FSH. I like everything about it but concerned whether I might have DPF issues. Annual mileage would be 8-10k mostly short runs of 10-20 miles with...
My parents purchased a Citroen C3 Picasso 1.6 HDi (DV6D) Exclusive back in September 2014 based on your review of the vehicle. My parents love the car however I have two questions to ask in regards to...
I have a 2011 Peugeot Partner Teepee 1600 diesel. The DPF was recently changed (108,000 miles) but the warning light has just come on saying chance of blocked filter. I have just driven the car for...
I keep getting a DPF warning light on my 2008 Jaguar XF. Can I have it removed and have the ECU remapped? I've found lots of websites offing this service.