Drivers buying used diesel cars are being urged to check to see if the car has a diesel particulate filter fitted as it is a legal requirement and could face some severe consequences if it isn’t.
DPFs are now a standard feature on all diesel cars and have been since 2009 in a bid to effectively reduce car emissions.
A DPF is a filter that captures and stores soot from the car’s exhaust pipe in order to reduce the amount of emissions they produce.
DPFs can reduce the amount of emissions produced by the car's exhaust by as much as 80 per cent, reports the RAC.
It is illegal to remove or tamper with your particulate filter and car owners face a £1,000 fine for doing so while van drivers face up to £2,500.
Replacing a broken filter is an expensive process which can cost between £1,000 and £3,500.
To maintain its efficiency a DPF must be emptied regularly or it becomes defective.
One method is typically done when temperatures reach a high enough temperature, usually at motorway speeds, in a process called regeneration.
To maintain the filter manufacturers suggest that every few hundreds of miles the car should be driven for a period of longer than 15 minutes at a consistent speed, higher than 40mph.
When buying a used car it may not be something you would automatically check so it is worth making sure that you do to avoid the hefty bill or fine if you’re caught without them.
Similarly, it is enough of a reason for you to fail your MOT test and the tester may refuse to check your vehicle until here is sufficient proof or reasoning for why it is missing.
The AA urges any driver that sees theDPFwarning light on the dashboard not to ignore it.
Ifa DPF warning lightdoes appear on the dashboard it could be because the car needs to complete an active regeneration cycle to clear theDPF.
Travellingat stop/start urban speeds constantly could see the filter get clogged up much more quickly. In fact, city drivers are advised not to purchase cars fitted with aDPF.