Coombe, Cornwall: Mobile DPF Cleaning
With call-out DPF cleaning, we come to the car. The technician arrives at your address in Coombe and gets to work. The diesel particulate filter is treated still on the motor, a DPF regeneration comes next, and you hold on to the filter you came with.
Budget for the visit running typically around 2 hours. The clean opens from £299, agreed by the phone before anyone leaves.
If the light is showing and the vehicle is down on power, this page is for you. That is how most drivers get to us.
The DPF light is on. What then?
Not the unit, always. Main thing to note. A number of faults put the same light on the identical dash, which is why a visit starts with a diagnostic rather than with cleaning.
It counts what you get with the motor between now and the appointment.
- Motor still driving as normal on an amber light — attempt a long steady run first. It costs nothing and frequently sorts the filter without help.
- Once the vehicle is in limp mode, motoring will not touch it. The window has closed.
- Diesel smell in the car, or black smoke under the throttle — stop booking long drives and get it checked.
The vehicle has been telling you already
By the time the light appears, things have usually been going wrong for weeks. It is last news:
- power tailing off, above all climbing uphill
- you find the revs stop short of where they once went
- worse fuel consumption
- a stop/start that has silently given up
- the interior reeking of diesel, or smoke when you press on
That is not proof alone. It is a fair bet the filter is loaded once the light is showing too.
What clogs diesel particulate filters round Coombe
Coombe is a rural hamlet, and the day-to-day driving that belongs to one is the poorest kind for a DPF. A regeneration wants the time and heat, and has none: not on the school run to Kea Community Primary School, not on B3289 at half past eight, not on ten minutes to Aldi, and not on the dash to Truro. Instead of burning away, the soot collects.
The M5 lies over 50 miles from Coombe, Truro under 3 miles away, and unless something carries you out that way often, whole weeks go by without the sustained run that empties a unit. Geography does not help.
Limp mode, and when DPF regeneration stops
It is self-protection: that is all limp mode amounts to. The entire difficulty is that a sustained drive works by setting off a regeneration, and in limp mode the revs will not rise and power is limited.
The common advice — take it up the motorway — is sensible, right until it is not. The filter wants cleaning rather than road work once the vehicle has gone into limp mode.
Where the motor stands is where the DPF is done across Coombe
The filter does not come off. That is the detail most drivers do not see coming: the job is done with the DPF yet bolted to the motor, on your front, in a work car park, any place the car can stand for a few hours.
First a diagnostic. Live ECU data, the soot load as a percent and as a weight, the sensors, the glow plugs, the connected components — all of it logged before a thing is touched.
Then the cleaning. A cleaning solution is injected through the access port on that car and expands inside the filter, lifting the soot and ash a regeneration on its own will never budge. Badly blocked filters sometimes take a second pass.
Next, a regeneration drives off everything the clean lifted. Either it goes as a monitored drive out of Coombe, with you there, or it is done where the car stands and the real-time data is verified after.
Finally the scan runs again — the change confirmed, the light reset, anything still showing noted. Both reports come to you by email, so the numbers are kept.
Where a clean is not the answer
Treatment cures one thing: a filter blocked with soot and ash. It does no good for:
- pressure sensors flagging a restriction that is not there
- EGR valves that stick open
- the AdBlue system playing up
- injectors or glow plugs that prevent a regeneration starting in the first place
- turbo problems, with oil getting into the filter
Which is why the scan goes first. When it is found to be one of those, you are told before any work begins rather than after you have settled up a penny.
A couple more worth knowing. Having the filter cut out is not a remedy — a vehicle without a serviceable DPF will fail its MOT and driving it is against the law. And cleaning is sometimes described as DPF renewal: nothing is replaced, your own filter is cleared in place and put back into use.
The cost for DPF cleaning around Coombe
Treatment begins from £299, with the call-out charge on top of that for every visit — it pays for the call-out, the booking, the scans and the advice.
Naming a flat rate would not be honest. We fix it over phone, once the vehicle and its probable needs are established. The motor moves it, and so does the address — Coombe, Trelissick, or somewhere further out in the TR postcode area.
If the diagnostic counts a clean out, there is not a penny to pay for it. Because the visit, the check and the advice have happened, the call-out charge even so stands.
If the light reappears inside that window, an engineer comes back out to Coombe — the work carries a 30-day warranty including aftercare.
The 2 guys that arrived were very pleasant, thorough and knowledgeable. Quickly diagnosed the issue on my Qashqai and rectified, high price tag naturally but - you get what you pay for! Fantastic work, very thankful.
At the moment 5 stars had my car done 3 days ago so far so good Liam the mechanic was very professional and polite only took 2 hrs max he gave me maintenance tips leaflet which is useful ill see what the next few weeks bring.
Excellent service, completely unclogged my dpf & identified a nox sensor would need replacing. Car now working as new. Recommended.
Vehicles we clean, and where we travel round Coombe
Private cars, panel vans and light commercials, HGVs, plant machinery, agricultural machinery — one on-site service across all of them, and on all of them the filter is cleaned where it sits rather than carried anywhere.
The same run that keeps technicians on B3289 most weeks picks up Coombe, Trelissick, Trevilla and the spots beyond Malpas. It is the diary, not the distance, that settles whether it is one day or the next, and coverage runs UK-wide — so call anyway from even further out across Cornwall.
The ground around Coombe
Coombe is a small coastal hamlet in Cornwall, situated near the city of Truro and close to the notable estates of Trelissick and Cowlands. Coombe sits at a low elevation of around 6 metres, looking out over the coastline of the South West. Coombe is characterised by its predominantly detached housing stock, reflecting its quiet and residential nature. Coombe remains a minor settlement within the wider Truro area, with nearby Old Kea also forming part of the local community.
Frequent questions on DPF cleaning in Coombe
- Can I merely take it for a long drive?
- Early enough, and with the motor out of limp mode, yes — sometimes. Ten minutes to Aldi and back will not be enough; motorway speed, kept for a while, will.
- The visit takes how long?
- It is typically around 2 hours. A heavily blocked filter can take a second clean, which lengthens that.
- How much does it run to in Coombe?
- Opening from £299, with a charge for the call-out that covers the check and advice on what to do next. Settling it is done by phone, since what you run and where you sit both move the number.
- Do I have to be there?
- A spot for the car to sit, for a couple of hours, is all that is wanted. Not you. Preferring to be there is welcome: the regeneration then runs out on the open road, monitored.
- Can someone travel to Coombe soon?
- That depends on the calendar, but it is often same-day or next-day. One phone call to 0303 330 1830 and you will learn what the TR area has free.
- Does the filter come off the motor?
- Not on the on-site service — it is cleaned where it stands. Taking a filter off or putting one back on count as anything work we do whichever way.
- Suppose the light comes back?
- Aftercare comes inside the 30-day warranty, and that includes an engineer returning to Coombe.
Set up DPF cleaning across Coombe
Phone 0303 330 1830 and describe what the car is doing — a light, limp mode, smoke, whatever it is. The price comes first, and so does the date, before anyone heads off for Coombe. Outside phone hours, email enquiries@dpf-fixer.co.uk and it is answered first thing.
ISO 9001 certified, SSIP Approved, SafeContractor approved and ISO 14001 certified, and every engineer holds public liability insurance.
DPF Fixer Ltd is rated 4.5 out of 5 from 1,989 reviews on Trustpilot. Mobile DPF Cleaner is a trading name of DPF Fixer Ltd; the rating is held by DPF Fixer.