Diesel Particulate Filter (DPF)

What is a Diesel Particulate Filter (DPF)?
The diesel particulate filter (DPF) has a pretty dirty job, it sits in the exhaust system and catches and stores soot that's produced from diesel engine combustion. They have become essential in diesel cars since Euro 5 emissions standards were introduced in 2009. It's actually illegal to remove a DPF from your car and the fines can be pretty hefty.

Given the average size of a DPF there's no way that it can hold all of the soot generated between service intervals. So to get around this they have a 'regeneration process' whereby the soot is periodically burned off. The ECU will decide when this needs to be done and will start the process without any driver intervention. If this process doesn't complete you'll often see the orange warning light (see image below).

When you see this it's vital to take the car out for a good run (ideally a motorway run) to give it chance to run the regeneration process. Running the car with this warning light on for months and not allowing it to regenerate can lead to significant engine problems and costs.

DPFs can cost into the thousands so maintaining yours is very important, especially on older cars where the replacement cost could easily write the car off value wise.
What problems can be caused by a faulty Diesel Particulate Filter (DPF)?
How much does it cost to replace the Diesel Particulate Filter (DPF)?
Are you sitting down? Good, because a new DPF from a manufacturer from between £1000 to £4000 to replace. There non-manufacturer (OEM) DPFs available but you have to be careful when buying these to ensure that the meet the requirements required by law.
37 problems that mention the Diesel Particulate Filter (DPF)

Showing the latest 10, see more problems here

Renault Trafic dci 115 , injection

The van has the orange engine symbol lit and the orange spanner symbol plus the red STOP light beside it lit . This has been a persistent problem ... I have had diagnostics done twice , two sensors re...

2012 Renault Trafic FLB1DS
Posted: Jul 4, 2022
Fan keeps coming on when engine is switched off.

Comes on intermitingly and drains the battery

2018 Skoda Superb 2.0 Executive Saloon
Posted: Jun 28, 2022
Hii I found p filter fault (level low) what does it mean and how I overcome it

My car is showing p filter error (low level),engine fault .can you suggest me what I will to do to overcome it.thanks.

2011 Peugeot 308 1.6
Posted: Jun 7, 2022
Engine temperature warning light on

Changed both of the water temperature sensors. temperature light still jumps up to the red. seems to happen when the car is starting to cool down a little it goes from three lights to two and a few se...

2003 Citroen C3 1.4i
Posted: Jun 1, 2022
Engine misfires and cooling fan not switching off for about 7-10 minutes. Happens every six weeks approx.

ENGINE LOOSES POWER When the engine starts to misfire it's always been hot or at least warm and the engine has been switched off a while; say 20 mins to 2 hours on average. The cooling fan seems to r...

2020 Vauxhall Grandland X 1.2 turbo
Posted: May 23, 2022
Plastic burning smell on 3 year old car.

3 year old car, suddenly has a strong burning plastic smell. No warning signs, no smoke. No obviously signs of anything leaking. Only does short journeys but regularly and tends to be smelling by the ...

2019 Skoda Citigo Citigo
Posted: Apr 9, 2022
Hi I sent my Ford Kuga 2014 to the dealer for servicing in October 2021 and they said it had a problem with the DPF and need to be fixed. I have not had it back since then and they keep saying they are still waiting for the parts. What should I do?

Sent my car for servicing and was told DPS sensor problem and needs a new one. That was in October and I am still waiting as they keep telling they are waiting for the order. I am with a ford dealer;...

2014 Ford Kuga Ford Kuga
Posted: Jan 29, 2022
Fan keeps coming on when engine is switched off.

My battery died which I thought I'd left a light on but after trying to charge the battery the fan keeps kicking in for 10 seconds then off again constantly, now im I thinking this may be what drained...

2006 Skoda Octavia 2.0 tfsi
Posted: Jan 8, 2022
Increased fuel consumption and reduction in power.

My long term fuel consumption has recently dropped from 65 mpg to 50 - 52 mpg in the last month. I have had the car 2 + years and can easily get 75 + mpg from it on most long moterway journies. Same j...

2016 Seat Leon 1.6 Ecomotive
Posted: Dec 27, 2021
Additive level diesel level too low 308

Warning light saying additive level particle emissions filter level to low

2011 Peugeot 308 1.6tdi
Posted: Dec 10, 2021
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