Peugeot DPF (FAP) Problems, Cleaning and Off-Road Removal
Summary: Many Peugeot diesels rely on a fuel additive to help the particulate filter — the FAP — burn its soot. When that system falters the filter loads quickly, so a blocked Peugeot DPF is often an additive or sensor fault first, and the road-legal fix is to correct it and clean the original filter.
Citroën and some Ford diesels share the hardware, and the faults. Other makes are on our DPF removal and cleaning hub.
Why do Peugeot DPFs block?
On these cars a separate reservoir doses a fluid into the fuel — Eolys on many models — so soot ignites at a lower exhaust temperature. The filter can only regenerate as well as that supply allows.
Additive faults are the most common reason we find for a blocked Peugeot filter; short journeys and a misreading pressure sensor add to it. Look for:
- An anti-pollution or depollution fault message on the display
- A particulate filter overloaded warning, or an additive system fault
- The glow plug or engine management light
- Limp mode that holds the engine to around 3,000 rpm
- Hard starting, or an engine that starts then cuts out
Left alone, the back-pressure reaches the turbocharger and can take its oil seals with it.
Which Peugeot engines are affected?
Filter faults turn up across the HDi diesels, chiefly the 1.6 and 2.0, and on the later 1.6 BlueHDi, in cars such as the 308 and vans such as the Partner. Not every version was built with a filter or the same additive set-up, so give us the registration and engine size.
Clean first: the road-legal fix
On a road-going Peugeot the order matters: diagnose the additive system and pressure readings, correct what is wrong, then have the filter professionally cleaned and refitted. A forced regeneration can shift soot, but not ash, and it will not cure an additive fault. Start with our DPF cleaning service.
Removing a Peugeot FAP: the UK law
It is road use that the law targets. The Road Vehicles (Construction and Use) Regulations require a vehicle on the road to keep meeting the emissions standard it was built to, and a Peugeot without its filter cannot. The MOT has checked for the filter from February 2014, and fines can reach £1,000 for a car and £2,500 for a light goods vehicle — the band a Partner van falls into.
Off-road and motorsport onlyWe remove Peugeot filters only on vehicles kept off public roads.
Peugeot DPF pages
Peugeot DPF and FAP FAQs
Is it legal to remove a Peugeot’s FAP in the UK?
Not on a Peugeot that goes on the road. Driving without the filter breaches the Construction and Use Regulations, fails the MOT and risks a fine of up to £1,000, or £2,500 for a van such as the Partner. We only carry out removals on off-road and motorsport vehicles.
Can I keep driving my Peugeot with an FAP warning?
Gently, and not for long. A message that clears after a steady run means the filter regenerated. If it keeps returning or the revs are capped, driving will not fix an additive or sensor fault, and the back-pressure strains the turbo.
Is removing the FAP worth it on a Peugeot?
For a road car, no: cleaning the filter and repairing the additive system is the lasting fix. On a competition or off-road Peugeot, its value lies in hand-edited software and smoke correction, not an automated delete.
How can I tell if my Peugeot FAP needs replacing?
Replace it if the core has cracked or melted, or if it stays restricted after a professional clean. First have the additive system and pressure sensor checked; on a Peugeot, either can make a serviceable filter look finished.
Sinspeed · Peugeot DPF and FAP
Peugeot showing a depollution fault?
Send the model, engine, display message and any stored codes. We will tell you whether it points to the additive system, a sensor or the filter.
Diagnosis by in-house specialists · ECU work on dealer-level tools
