DPF Diagnosis, Cleaning & Off-Road Solutions

A diesel particulate filter traps soot and periodically burns it off in a regeneration cycle. When that cycle keeps failing you get warning lights, reduced power and eventually limp mode. The cause is very often not the filter itself — it is a differential pressure sensor, a temperature sensor, an EGR issue, a glow plug, or simply a car doing nothing but short journeys and never getting hot enough to regenerate.

So we start by finding out what is actually wrong. That means reading the live data, checking the sensors and looking at the regeneration history rather than reaching for the easy answer. Plenty of DPF problems are a sensor and a forced regen away from being solved, and that is a far cheaper morning for you than any alternative.

Where the filter is genuinely blocked, it can often be cleaned rather than replaced. Where it is cracked or the substrate has collapsed, it needs replacing — and we will tell you that honestly.

We also carry out DPF removal and mapping for vehicles used exclusively off the public road: motorsport, competition, plant, agricultural and export vehicles. This needs saying clearly, because too many places gloss over it. Removing or disabling a DPF on a vehicle used on UK roads is illegal. It is an automatic MOT failure, it breaches the Road Vehicles (Construction and Use) Regulations, and it can invalidate your insurance. We will ask you what the vehicle is used for, and we will take your answer at face value — but the responsibility for how the vehicle is used afterwards is yours, and we will not pretend otherwise.