Ford Focus Mk2 1.6 TDCi 110bhp — Diesel Particulate Filter Blockage
DPF blockage on the Focus Mk2 1.6 TDCi is one of the most common complaints. Ford fitted DPFs from 2007 onwards and city-driven examples struggle to complete the regeneration cycle.
Severity
ModerateDIY Difficulty
Moderate
Est. Cost
£200–£1000
OBD Codes
P2452P2453P246CDPF
Typical layout and location for the DPF assembly.
Symptoms
- DPF warning light (amber)
- Reduced power and limp mode
- Engine running rough under load
- Strong diesel smell from exhaust
- Oil level above maximum on dipstick (diesel dilution from failed regens)
Root Cause
The DPF requires sustained motorway speeds to regenerate. Urban-only Focus diesels accumulate soot faster than passive regen clears it. Failed active regens result in diesel contaminating the engine oil.
How To Fix
- Check oil level first — if above max and smells of diesel, change oil immediately
- Forced regen via OBD (Forscan can trigger this)
- Professional DPF clean: £200-300
- If blocked beyond cleaning: replacement £500-1,000
- Prevention: 20-min motorway run every 2 weeks
Estimated Repair Costs
| Repair Option | Est. Cost (GBP) |
|---|---|
| DIY (parts only) | £80–£400 |
| Independent Garage | £200–£1000 |
| Main Dealership | £320–£1600 |
Other Faults on This Variant
EGR Valve Failure
ModerateThe EGR valve is a common failure on the 1.6 TDCi engine, causing power loss, rough idle, and excessive smoke.
Dual Mass Flywheel (DMF) Failure
SevereDMF failure is one of the most expensive known faults on the 1.6 TDCi. Typically requires replacement of flywheel and clutch together.
Turbocharger Failure
SevereTurbo failure on the 1.6 TDCi is common at higher mileages, often caused by oil starvation or sludge blockage.
Disclaimer: Repair cost estimates are indicative and based on community data. Always get a quote from a qualified mechanic before proceeding with any repair.