Peugeot 308 (T7 / T9)DPF Cleaning & Common Problems
Off-car cleaning for the Peugeot 308 (T7 / T9) — inspected, deep-cleaned, flow-tested and returned with the before/after data. Trade and public welcome.
Service summary
- Engines covered
- DV6 1.6 HDi, DV6FC 1.6 BlueHDi
- Emissions stage
- Euro 4 / Euro 5 / Euro 6
- DPF type
- FAP wall-flow DPF; early cars use the Eolys additive system, BlueHDi cars add SCR/AdBlue
- Typical price
- from £130 trade · from £220 retail
- Turnaround
- Same day local drop-off · 48hr courier
- Get it to us
- Drop off at N18, courier, or collection
Diagnose first
Cleanable in many cases, but this family needs assessment before we commit — send details first.
Check your exact vehicle
The 308was built with more than one engine and emissions setup. Enter your registration and we'll confirm the exact unit before anything is quoted.
Vehicle data from the DVSA MOT history service. We confirm the exact unit on inspection. Privacy
What we see on the Peugeot 308 (T7 / T9)
Worth knowing about this model
- →PSA pioneered the additive-assisted FAP: pre-BlueHDi cars dose Eolys fluid into the fuel, and the additive tank level is part of any DPF diagnosis.
- →BlueHDi (Euro 6) cars swap the additive approach for SCR — two different systems under one model name.
What commonly goes wrong on this engine
- ·On pre-BlueHDi cars the Eolys additive system is the DPF's lifeline: an empty tank or failed dosing pump stops effective regeneration and the FAP loads to failure with no engine fault present.
- ·Cerium additive ash builds permanently in FAP cores — restoring capacity means removing additive ash, not just soot, which is exactly what a bench clean addresses and an on-car 'regen flush' cannot.
- ·The DV6's carbon-prone turbo oil-feed (shared with the Ford 1.6 TDCi) means oil-soaked 308 filters usually signal a turbo on its way out.
Faults that look like a blocked DPF but aren't
- ·Additive-dosing faults presenting as repeated regen failures with a healthy filter
Check these before removing the filter
- ·Check the Eolys additive level and dosing history on pre-BlueHDi cars
- ·Check turbo condition before condemning the filter
When cleaning won't fix it
- ·Oil-soaked core with an unrepaired turbo or oil-feed fault
- ·Cracked or melted core
General diesel causes (shared across engines)
- ·Short-journey use preventing regeneration
- ·EGR valve sticking
- ·Differential-pressure sensor faults
Mistakes we see garages make
- ·Diagnosing a blocked FAP without checking the Eolys additive level and dosing counter — an empty tank silently stops regeneration on pre-BlueHDi cars.
Test evidence
Every unit is flow- and pressure-tested before and after cleaning. You get the readings, photo evidence and a completion certificate with the unit — proof for you and your customer, not marketing numbers.