Can I reject my secondhand diesel because the DPF light keeps coming on?

I’ve recently bought a used car on finance with a deposit of £1000. On day three of having the car (less than 50 miles later), the engine management light came on. I rang the dealership and took it in....

The DPF light has come on in my car despite doing lots of miles - why has this happened?

I have a 2008 BMW 3 Series Touring 3.0d. I do 20,000 miles per year on A roads, at high speeds, and change the oil and filter very regularly. A diesel particle filter warning light has now come on. Why...

The DPF warning light is flashing on my Mazda 6 - does the particulate filter need cleaned or replaced?

My Mazda 6 has a particulate filter warning light flashing, despite two hours on the motorway. The car has never done this in four years of ownership. It's done 99,000 miles. Does the DPF need cleaned...

Can I clean my blocked DPF with Mr Muscle oven cleaner?

Is it okay to clean the DPF filter with Mr Muscle oven cleaner and then put it back? It’s a lot cheaper than replacing it but does it do the job? I have a Vauxhall Vectra 1.9 DTi that’s done 120,000 miles...

The DPF on my BMW 5 Series is blocked - can I add something to clean it?

The DPF on my BMW 5 Series is blocked. Can I add something to clean it as I only do short journeys, or should I give the car a good run on the motorway?

I'm getting a 'risk of filter clogging' warning - what do you advise I do?

I have a 2011 Peugeot Partner which has just started displaying a 'risk of filter clogging' warning. I took it for a run on the dual carriageway, but it hasn't made any difference.

What maintenance costs can I expect on my 2013 diesel Ford Mondeo?

You say the underlying maintenance cost is the reason for the collapsing of diesel car prices. I'm concerned because I own a 63 reg Ford Mondeo Estate 2.0d, with 40,000 miles that I plan to keep for another...

My car went into limp mode with no warning - why has the DPF filled up so fast?

The DPF on my 2009 Jaguar XF was professionally cleaned after going from amber to red. The car had done high mileage (104,000), so I was kind of expecting it. 13,000 miles after the clean, it went straight...

What would you recommend doing to keep my diesel Audi A6 Allroad well maintained?

I own a 2011 Audi A6 Allroad 3.0 TDI 240PS 6 speed auto with paddle shifts (98,000 miles). Other than 10,000 mile oil changes, what would you recommend doing to keep this on the road for a few years? It...

Motability is now charging to unclog DPFs - should I get a petrol SUV/MPV to avoid this issue?

I'm a Motability hirer. For three years, I have driven a diesel Nissan Qashqai 1.5 and had no DPF problems whilst doing mainly short runs and covering 20,000 miles. My real mpg is approximately 45 - 60...