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.
24 problems that mention the Diesel Particulate Filter (DPF)

Showing the latest 10, see more problems here

2
responses
Dpf issues

Hi my Ford kuga has been seen by a couple of different garages. No one has sorted the issue.. I’ve had a new dpf a new vaporiser a new sensor too. Drove car up A road and then home and then engine m...

2012 Ford Kuga 2.0 tdci
Posted: Sep 26, 2021
1
response
New turbo

Fitted new turbo.. After 500 yards engine revved out of control... killed ignition but engine kept running.. now blowing smoke out and not revving past 2500 rpm.. and we turbo blowing oil out...HELP

2015 Vauxhall Combo Combo ecoflex
Posted: Sep 9, 2021
3
responses
Shuddering and Stalling at low rpm in automatic mode

At low rpm in 1st, 2nd and reverse gears the car will shudder and eventually stall when set to automatic, if driven in manual it appears to drive fine in all situations and gears. every so often the ...

2008 Citroen C4 2.0 HDi Grand Picasso
Posted: Sep 6, 2021
2
responses
DPF Filter/eolys pump Fault

Hi I have recently taken my car to the garage, where they diagnosed that the DPF filter was 100% clogged and that the Eolys Pump was not functioning. Having just paid quite a large sum of money in th...

2012 Peugeot 308 1.6HDI
Posted: Aug 25, 2021
1
response
2009 mondeo dpf warning 8 weeks ago cans of cleaner and driven @ 3000revs everywhere and light still on vs ever

Fault code p202 still persists after driving @3000revs for 4 trips of 25 miles no lack of performance or economy and 3 cans wynns dpf cleaner(3 tanks of fuel)

2009 Ford Mondeo 2.0 diesel
Posted: Aug 17, 2021
4
responses
Gearbox/Clutch

Gearbox or clutch does not seem to be engaging whilst driving under 30mph, there is repetitive noise outside the car when there are problems with the gearbox followed by a really strong burning smell ...

2019 Vauxhall Insignia 2.0 Elite Auto
Posted: Jul 30, 2021
1
response
Fault code P2015 intake manifold control valve actuator internal performance too short low time.

I have noticed my fuel economy has got worse, I have oil in the intake manifold I also think am getting diesel in the engine oil. The car has no warning lights apart from the DPF warning light comes u...

2012 Vauxhall Astra 2.0l cdti sri GTC
Posted: Jul 27, 2021
4
responses
DPF warning

Warning light and alarm sounds but following turning engine off there is a fan that starts up and runs for a while. Next time I start the car the alarm and warning light have disappeared ! The fu...

2013 Vauxhall Antara 2.2 CDTI Exclusiv
Posted: Jul 19, 2021
1
response
Looking for DPF tank ,under floor

dpf resavior warning lights on

2007 Citroen C4 1.6 hdi
Posted: Jul 8, 2021
1
response
DPF and Injector problems

DPF warning light came on, car goes into Limp Mode. While limping to local garage ESP light etc came on. Manage to get to garage who contacted me to say diesel injector needs replacing as that is firs...

2012 Peugeot 3008 3008 allure
Posted: Jun 29, 2021
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