Diesel Particulate Filter (DPF) Fault Symptoms & Problems

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.
5 Symptoms of Diesel Particulate Filter (DPF) Problems
We have 17 owner submitted problems mentioning the Diesel Particulate Filter (DPF)

Showing the latest 10, see more problems here

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...

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 t...

2012 Peugeot 3008 3008 allure
Posted: Jun 29, 2021
4
responses
Eloys pump not working after fitting a new dpf

Engine repair needed light came on ,garage checked and fitted new dpf but still the fault warning comes on then garage s...

2013 Peugeot 308 Sw 1.6 hdi
Posted: Jun 13, 2021
6
responses
Smoke from exhaust

After driving for a while when engine hot sometimes I get a funny smell like carbon ,then smoke comes out of the back of...

2007 Vauxhall Vectra 1.9
Posted: May 20, 2021
1
response
Fan running

On monday eve it smelt strongly of petrol but soon went ,i noticed once going into 3rd a slight shudder.tues Thurs was f...

2016 Citroen DS3 Performance
Posted: May 15, 2021
1
response
Warning light on dash

Warning light on dash check pollution system

2010 Renault Scenic 15 diesel
Posted: Mar 27, 2021
1
response
Engine management and esp/asr system fault

Had this problem a few weeks now first time Engine management light came on along with ESP/ASR System fault it was taken...

2066 Citroen Berlingo HD Blue
Posted: Feb 13, 2021
3
responses
High fuel comsumtion

van using lots more fuel than it used to do,i have used a dpf cleaner in the exhaust,also had a full service,i also use ...

2013 Vauxhall Vivaro 2.0 cdti
Posted: Feb 2, 2021
4
responses
Astra j 2014 diesel loss of power

Astra j 2014 diesel won't rev above 1400rpm and will only drive about 5mph max. Garage which l took it to told me that t...

2014 Vauxhall Astra 1.6 diesel
Posted: Jan 15, 2021
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