DPF warning light, limp mode, or a DPF that keeps blocking? Cleaning or replacing the filter only lasts if you know why it blocked. We find the real cause in our Northampton workshop, using PicoScope, dealer-level diagnostic tools and our XTON DPF machines, before recommending any work.
A diesel particulate filter (DPF) traps soot from the exhaust and burns it off during regeneration. When regeneration can't happen, or something upstream sends too much soot, the DPF blocks, the warning light comes on and the car often goes into limp mode.
A blocked DPF is usually a symptom, not the cause. We check the DPF pressure sensor, temperature sensors, soot load and regeneration history, and look for the faults that overload the filter: EGR valves, injectors, turbo and boost leaks, sensors and wiring. We use PicoScope and dealer-level tools on the vehicle, and our XTON machines to test the filter itself.
If the DPF needs cleaning, we remove it and carry out a full professional clean on our XTON DPF Master Flash DUAL AI, so the fix lasts.
Book DPF diagnosticsDealer-level diagnostics read fault codes, soot load, pressure readings and regeneration history.
PicoScope and component tests on sensors, EGR, injectors and boost show why the DPF is blocking.
We tell you what we found and give you a clear quote before any work starts.
We repair the cause and, where needed, clean the DPF professionally on our XTON machine.
Our workshop is at Moulton Park in Northampton, a short drive for customers from:
Not for long. Driving with a blocked DPF can push the car into limp mode and, in the worst cases, damage the turbo or the filter itself. Book a diagnosis as soon as the light comes on.
Because a DPF rarely blocks on its own. If a faulty sensor, EGR valve, injector or boost leak caused it, a cleaned or new DPF will block again. Diagnosis finds the cause so the fix lasts.
No. If the filter needs cleaning, we remove it and carry out a full professional clean on our XTON DPF Master Flash DUAL AI, with a before-and-after pressure test.
No. Removing a DPF from a road vehicle is illegal in the UK and the vehicle will fail its MOT. We diagnose and repair the system so it works as the manufacturer intended.
Diesel cars, vans and 4x4s of all makes, including Ford, VW Group, BMW, Mercedes, Land Rover, Peugeot, Citroën and Vauxhall.
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