Mobile DPF cleaning and diagnostics across Hertfordshire, Bedfordshire, Buckinghamshire and North West London, out to Milton Keynes, Oxford, Reading and Cambridge.
We don’t just clear codes. Every call-out includes a full 12-point diagnostic check, so you find out what actually caused it. From £220, fully insured, 30 years under the bonnet.
Ignore it and a £220 clean turns into a £2,000 replacement.
Catch it early and it is a straightforward job. Leave it and the filter can crack, clog solid, or drag other components down with it. That is the difference between a morning call-out and a new part.
You booked a DPF clean. You still get the full check, because the filter is rarely where the problem starts.
A blocked DPF is a symptom. Something upstream put the soot there, and if we clean the filter without finding it, you will be booking us again in two months. So before anything gets touched, the whole system gets read.
Twelve checks. On every call-out. Included in the price.
Number 11 is the one most places skip. Not everything shows up on a laptop. A split turbo pipe bleeds away your boost and loads the filter, and it will not always throw a code. That one needs hands on the car.
A cheap flush is soot in, soot out, problem back in a month. Here is what you get instead:
| Comparison | MotorDoc Pro | Typical flush service |
|---|---|---|
| Diagnostic before cleaning | Full 12-point check | Read the code |
| Physical inspection | Yes, pipes and hoses by hand | No |
| Proof it worked | Before and after backpressure figures | None |
| Report you can keep | Yes, take it to any garage | No |
| Warranty | 30 days | None |
| Insured | Fully | Ask them |
A new EGR valve had already been fitted. We actuator-tested it and it was working perfectly. The real fault was a fouled EGR cooler and a thermostat stuck open, so the engine never got hot enough to burn off its own soot. Replace the valve and miss that, and the fault comes straight back.
Abnormal soot readings. The filter was not the issue: the differential pressure sensor had a split diaphragm and was reporting a blockage that was never there. We also found a turbo oil leak left behind by a previous garage, and told the customer exactly where that liability sat.
An emissions fault that would not stay cleared. The upstream NOx sensor had been sitting at low voltage long enough to be permanently damaged, and no amount of code-clearing brings one of those back. The battery needed replacing too. This is why the electrical check is in our twelve.
"SAVED ME THOUSANDS in repairs. My mechanic quoted me 2 grand for a new DPF, Kris came out, my car runs great ever since."
"Very impressed with the service that Kris provided. Cleared a fault that a local garage couldn’t. Highly recommend."
Rob Thompson
"Kris was prompt, professional and honest, as well as fixing the DPF issues on my car. Highly recommended."
Amir Abbas
4.7 stars from 27 Google reviews. See them on Google →
Based in Watford, covering Hertfordshire, Bedfordshire, Buckinghamshire, Middlesex and North West London, out to Milton Keynes, Oxford, Reading, Guildford and Cambridge.
Home, work or roadside. We work by appointment, so you get a booked slot rather than a wait.
Not sure if you’re in range? Send your postcode and we’ll confirm.
From £220
DPF clean and diagnostic
Most jobs land between £220 and £275, depending on make, model, how badly the filter is blocked and your location. 60 to 90 minutes on site. The 12-point check, the report and the 30-day warranty are all included.
£150
Just want to know what’s wrong?
The same 12-point check plus a written report, no clean, no obligation.
If you then book the clean, the £150 comes off.
Compare either to £1,000s for a replacement DPF.
Send the details and we’ll come back with a straight answer on whether a clean will sort it and what it costs.
