DPF Regeneration & Repair
Why Pick Us
Symptoms of a Blocked DPF
- Dashboard warning light (usually like a mini exhaust cloud or engine symbol)
- Reduced power or limp mode kicking in
- Poor fuel economy
- Engine rattling or harder starts
- Increased smoke or smell from the exhaust
- Regeneration attempts failing (more on that below)
DPF Regeneration
- Passive Regen – Happens on long motorway drives at higher speeds.
- Active Regen – The car injects extra fuel to raise the exhaust temp.
- Forced Regen – The big guns, usually done at a garage (like us).
DPF Cleaning
- More affordable than a replacement
- Better for your car and the environment
- Can often be done same-day
DPF Replacement
Frequently Asked Questions
The DPF (Diesel Particulate Filter) sits in your exhaust system and catches the tiny soot particles produced by diesel combustion. It helps reduce emissions and keeps your car within legal limits.
That light’s your car’s way of saying “I’m clogged!” It usually means the DPF’s getting too full of soot and regeneration hasn’t cleared it. It’s not always serious - but it won’t fix itself if ignored.
Technically yes, but we wouldn’t recommend it. A blocked DPF can cause loss of power, increased emissions, poor fuel economy, and damage to your turbo or engine if left too long. Best to get it looked at.
During regeneration, your car might idle differently, the fan might stay on after you turn the engine off, or you’ll notice a burning smell. Some cars also show higher RPMs or fuel use. If you’re unsure, we can check.
Short trips, lots of stop-start driving, poor fuel quality, or even a dodgy sensor can all mess with regeneration and lead to build-up. Modern diesels need a good motorway blast now and then to keep the DPF happy.
Not properly, no. There are additives you can buy, but they rarely work well once a DPF is already blocked. A proper clean needs specialist equipment — like the stuff we’ve got in our workshop.
It depends on your car and how bad the blockage is, but cleaning is nearly always cheaper than replacement. Pop in for a quote — we’ll only recommend a clean if we think it’ll work.
It might - until your next MOT or roadside check, when you could fail or face a hefty fine. DPF deletes are illegal on road cars in the UK. We don’t offer or recommend them.
Yes, if cleaning or regeneration won’t work. We can supply and fit a quality replacement, and make sure everything’s reprogrammed properly so it talks to your car’s ECU as it should.
Give your car a proper run now and then - 20+ minutes at motorway speeds helps regen. Use good quality fuel, service it regularly, and don’t ignore warning lights. We’ll also give you tailored advice after any work we do.
