Mobile DPF Cleaning for St Martin, Cornwall
Treating the DPF takes place at the motor, not at a garage. A technician comes at your place over in St Martin, clears the diesel particulate filter while it is still on the car, performs a DPF regeneration, and you end up with the filter you started with.
The visit lasts typically around 2 hours, the clean starts from £299, and the figure is settled over the phone before anyone sets off.
The light is already on and the vehicle is low on power — that is how we generally meet people, and roughly what this page is about.
Your DPF light is lit — what then?
The DPF is not automatically what is wrong, and that comes first. That light can come from a number of faults, not merely one, so the visit begins with a diagnostic and not with cleaning.
How the motor is run in the meantime makes a difference too.
- Amber light, motor still driving fine — a long steady run can yet sort it by itself. Costs zero, and worth attempting before you book anything.
- That window has closed once the vehicle has dropped into limp mode. A drive will not do it now.
- Get it looked at rather than driving it — diesel in the car, or smoke on acceleration, has gone past the long-run stage.
Before the light, what the vehicle was telling you
The light is belated news. By the time it appears, the symptoms have generally been growing for weeks:
- dropping away on power, particularly uphill
- the revs no longer climb the way they always did
- fuel use that is worse than it was
- the stop/start without a word bowing out
- diesel in the cabin, or smoke on the way up through the box
Any one of those, taken alone, is not proof. With the light, it is a fair assumption the filter is full.
The reason diesel particulate filters block round St Martin
Being a coastal village, St Martin throws up exactly the use a DPF copes with the poorest. The school run to Manaccan Primary School, Green Hill at a halt at the morning rush, five minutes to Sainsbury's, the run to Penmere — nothing of it goes on long enough or runs hot enough for the filter to see through a regeneration. Unburnt soot that should burn away banks up instead.
Neither is distant from St Martin: over 50 miles to the M5, under 15 miles to Truro. Neither is on the way to anything most weeks, though, so the run that would clear a filter hardly ever happens.
Why limp mode blocks a DPF regeneration
What limp mode comes down to is the car protecting itself. Power is capped, the revs will not rise, and the regeneration the filter wants can no longer happen — which is the whole problem, because a sustained drive works by starting that regeneration.
Running it up the motorway is the common advice, and it works right up to a limit. The far side of that stage — limp mode — driving will not do it, and the filter needs a clean.
Where the car stands is where the DPF is done round St Martin
Most drivers do not see coming this part: the filter stays put. The job happens with the DPF yet fixed to the vehicle — on your front, in a work car park, wherever the vehicle can stand for a few hours.
Nothing is touched until other faults are cleared. That means a diagnostic first: running data off the ECU, soot load by percentage and by weight, and a check of the sensor readings, glow plugs and connected parts.
Soot and ash that a regeneration by itself will never move are freed next, by a cleaning fluid fed through the entry point on that vehicle, which expands inside the filter. Severely loaded filters sometimes take a second pass.
Then a regeneration, to clear what the clean has lifted. Ride along with the car and it becomes a monitored drive out of St Martin. Park it and the regeneration goes in place, with live data verified once it is done.
Then a second check, proving the change, putting out the warning light and logging anything still outstanding. Both sets of figures are emailed over, so the before and after figures are kept.
When a DPF clean is not the solution
Treatment cures one thing: a filter clogged with soot and ash. It does nothing for:
- a temperature or pressure sensor reporting a block that is not there
- an EGR valve stuck open
- the AdBlue system playing up
- injectors or glow plugs that stop a regeneration starting at all
- turbo failure, with oil reaching the filter
The first check is there for precisely that. You are warned before the work begins, not after you have paid, should it turns out to be one of those.
Lastly, two things. A vehicle with the filter gutted fails its MOT, and driving it is an offence, so that is no solution. What gets looked up as DPF renewal exchanges nothing: your filter is cleared in place and goes back into service.
DPF cleaning costs around St Martin
Any visit attracts a call-out charge — coming out to you, setting up the booking, running the diagnostic and passing on the advice. The clean itself opens from £299.
No single flat rate would be honest, so the figure is agreed over the phone once we know the vehicle and what the filter is likely to need. Two separate things change it: what you run, and where you are — St Martin itself, across at Newtown, or otherwise out within the TR postcode area.
A clean that will not help is not treatment you pay for, and the diagnostic is what says so. What still applies is the call-out charge, since the visit took place, the check was carried out and the advice was given.
A 30-day warranty takes in aftercare on the job, and that includes an engineer heading back out to St Martin if the light returns inside the period.
Igor came out and spotted the issue as soon as he lifted the bonnet, lovely knowledgeable lad. Couldn't fault the company in any way. Booking was efficient, phone call to say when arriving, aftercare brilliant too.
Professional company. Chris explained what he would do, then gave me a detailed printed report afterwards. Communication was good throughout. Very pleased.
Came to my place of work which helped. Very courteous & friendly engineer. A bit pricey I thought for an hour and half work at £450, but I had to get it done.
What we clean, and how far we go around St Martin
One on-site service takes in cars and estates, vans and light commercials, HGVs, plant machinery and farm vehicles, and on every one the filter is cleaned on the vehicle rather than moved anywhere.
Most weeks there is usually someone on Green Hill, so St Martin seldom means a journey of its own, and Newtown, Newtown-in-St Martin and the spots past Mawgan follow. Farther out through Cornwall is still worth a call — coverage runs UK-wide, and it is the diary rather than the distance that picks between this day and the next.
A word on St Martin
St Martin is a small coastal village in Cornwall, situated near the towns of Newtown and Truro, with a mix of detached homes and scenic views of the surrounding area. St Martin sits at an elevation of 85 metres, overlooking the coastline of Cornwall. St Martin remains a quiet, predominantly residential community with a strong sense of local identity, close to Bishops Quay and other nearby settlements.
Questions St Martin drivers ask about DPF cleaning
- Can I merely take it for a long drive?
- If you catch it early, and the car is not in limp mode, sometimes. A steady run at motorway speed is what it takes — not five minutes to Sainsbury's and back.
- Does the visit last long?
- Count on typically around 2 hours, with a second clean extending that where the filter is badly blocked.
- How much does it cost across St Martin?
- Cleaning opens from £299, and the call-out charge on top takes in the visit, the scan and the advice. Pricing is done by phone, since what you run and where you are both shift the figure.
- Must I be present in person?
- The motor requires a spot for two hours or so. You do not need to be in it. Wanting to be there is welcome: the regeneration then runs out on the move, monitored.
- When can someone travel to St Martin?
- It is often same-day or next-day, depending on what is now in the calendar. Call 0303 330 1830 and you will learn what is available across the TR area.
- The filter — does it come away from the motor?
- Not on the mobile service — it is done where it is. And neither does lifting a filter off nor fitting one back on is work we do.
- And if the light returns?
- Included by the 30-day warranty: aftercare, and an engineer travelling back to St Martin.
Arrange DPF cleaning across St Martin
However it is doing — light, limp mode, smoke — tell us so when you ring 0303 330 1830. Before anyone leaves for St Martin, you will know both a quote and a slot. Anything sent to enquiries@dpf-fixer.co.uk outside hours is answered first thing.
We are ISO 9001 certified, SafeContractor approved, ISO 14001 certified and SSIP Approved, and the engineers hold full public liability insurance.
Mobile DPF Cleaner is a trading name of DPF Fixer Ltd, which is rated 4.5 out of 5 from 1,989 reviews on Trustpilot. The rating is held by DPF Fixer Ltd.