DPF cleaning costs £150 to £400 in the UK depending on method. Forced regeneration is £80 to £150, chemical cleaning £200 to £400, and off-car ultrasonic cleaning £250 to £500. Replacement exceeds £1,000.
| Vehicle type | Typical range | What affects it |
|---|---|---|
| Forced regeneration | £80–£150 | Diagnostic-led, partial blockage |
| Chemical cleaning (on car) | £200–£400 | Heavier blockage, no removal |
| Off-car ultrasonic cleaning | £250–£500 | Most thorough, includes removal |
| DPF replacement | £1,000–£2,500 | Where cleaning cannot recover the filter |
Written by Chris Fisher, founder of Clarity-GMS and a working independent garage owner.
A blocked diesel particulate filter is one of the most common faults on modern diesels, and one of the most misunderstood. The good news is that cleaning is far cheaper than replacement. The better news is that in many cases you can avoid the bill entirely.
Forced regeneration, £80 to £150. A garage connects diagnostic equipment and commands the engine to run a regeneration cycle, burning off accumulated soot. Quick, cheapest, and effective on a partially blocked filter caught early.
Chemical cleaning, £200 to £400. Cleaning fluid is introduced directly into the filter, usually through the pressure sensor port, dissolving deposits. Handles heavier blockages without removing the DPF.
Off-car ultrasonic cleaning, £250 to £500. The DPF is removed and cleaned in a specialist tank. The most thorough option, and the one that recovers filters others cannot. Costs more because of the removal and refitting labour.
Replacement, £1,000 and up. Where cleaning cannot recover the filter, or it is physically damaged or melted.
A DPF traps soot from the exhaust and periodically burns it off — regeneration — which requires sustained high exhaust temperature. That means a decent run at speed.
Short journeys never get the exhaust hot enough. The filter fills, the car attempts regeneration, the journey ends before it completes, and the cycle repeats until the filter is blocked. This is why DPF problems cluster around diesels used for short urban trips — exactly the cars least suited to a diesel engine in the first place.
If your DPF light has just come on and the car is otherwise running normally, a sustained motorway or A-road run at higher revs will often trigger a successful regeneration and clear it. Twenty to thirty minutes at 2,000rpm or above in a lower gear than usual is the standard advice.
This works only if you catch it early. Once the car has entered limp mode or is showing a hard fault, it will refuse to regenerate and needs a garage.
DPF removal is still offered, and it is a mistake.
It has been an automatic MOT failure since 2014 — testers check visually for the filter's presence. It is an offence under the Road Vehicles (Construction and Use) Regulations to use a vehicle with an emissions control device removed. Your insurance may be invalidated as an undeclared modification. And it makes the car harder to sell.
Whatever a cleaning bill looks like, it is cheaper than an un-MOT-able car.
Give the car a sustained run at speed at least fortnightly.
Use the correct low-ash (low SAPS) engine oil — the wrong oil actively clogs a DPF.
Do not ignore the DPF warning light. Acting at the light is a £100 job; ignoring it is a £400 one.
Do not switch the engine off mid-regeneration if you can avoid it.
If almost all your driving is short urban journeys, a diesel may simply be the wrong car.
Guide prices only. Actual cost varies by vehicle, blockage severity and local labour rates. Get free quotes from vetted local garages through Fix My Motor — compare and book without ringing around yourself.A blocked diesel particulate filter is one of the most common faults on modern diesels, and one of the most misunderstood. The good news is that cleaning is far cheaper than replacement. The better news is that in many cases you can avoid the bill entirely.
Forced regeneration, £80 to £150. A garage connects diagnostic equipment and commands the engine to run a regeneration cycle, burning off accumulated soot. Quick, cheapest, and effective on a partially blocked filter caught early.
Chemical cleaning, £200 to £400. Cleaning fluid is introduced directly into the filter, usually through the pressure sensor port, dissolving deposits. Handles heavier blockages without removing the DPF.
Off-car ultrasonic cleaning, £250 to £500. The DPF is removed and cleaned in a specialist tank. The most thorough option, and the one that recovers filters others cannot. Costs more because of the removal and refitting labour.
Replacement, £1,000 and up. Where cleaning cannot recover the filter, or it is physically damaged or melted.
A DPF traps soot from the exhaust and periodically burns it off — regeneration — which requires sustained high exhaust temperature. That means a decent run at speed.
Short journeys never get the exhaust hot enough. The filter fills, the car attempts regeneration, the journey ends before it completes, and the cycle repeats until the filter is blocked. This is why DPF problems cluster around diesels used for short urban trips — exactly the cars least suited to a diesel engine in the first place.
If your DPF light has just come on and the car is otherwise running normally, a sustained motorway or A-road run at higher revs will often trigger a successful regeneration and clear it. Twenty to thirty minutes at 2,000rpm or above in a lower gear than usual is the standard advice.
This works only if you catch it early. Once the car has entered limp mode or is showing a hard fault, it will refuse to regenerate and needs a garage.
DPF removal is still offered, and it is a mistake.
It has been an automatic MOT failure since 2014 — testers check visually for the filter's presence. It is an offence under the Road Vehicles (Construction and Use) Regulations to use a vehicle with an emissions control device removed. Your insurance may be invalidated as an undeclared modification. And it makes the car harder to sell.
Whatever a cleaning bill looks like, it is cheaper than an un-MOT-able car.
Give the car a sustained run at speed at least fortnightly.
Use the correct low-ash (low SAPS) engine oil — the wrong oil actively clogs a DPF.
Do not ignore the DPF warning light. Acting at the light is a £100 job; ignoring it is a £400 one.
Do not switch the engine off mid-regeneration if you can avoid it.
If almost all your driving is short urban journeys, a diesel may simply be the wrong car.
Guide prices only. Actual cost varies by vehicle, blockage severity and local labour rates. Get real quotes from local garages for your car.
Last reviewed: 2026-07-30
The filter has accumulated soot and needs to regenerate. If the car is otherwise running normally, a sustained run at higher revs will often clear it. If the car has entered limp mode, it needs a garage.
Often, if caught early. Twenty to thirty minutes on a motorway or A-road at 2,000rpm or above, in a lower gear than usual, will frequently trigger a successful regeneration. This will not work once a hard fault is logged.
No. Removing the filter has been an automatic MOT failure since 2014, and it is an offence to use a vehicle with an emissions control device removed. It may also invalidate your insurance.
Almost always short journeys. Regeneration needs sustained high exhaust temperature, which urban stop-start driving never achieves. Using the wrong engine oil also contributes — modern diesels need low-ash (low SAPS) oil.
Yes, considerably. Cleaning ranges from £80 to £500 depending on method, against £1,000 or more to replace. Cleaning only fails where the filter is physically damaged or melted.