Peugeot 308: 2.0 BlueHDi DW10FC DPF Blockage on Short Trips

The 2.0 BlueHDi DW10FC diesel engine fitted to 308 SW and 3008 requires sustained motorway-speed driving to raise exhaust temperatures high enough for passive DPF regeneration. In NZ/AU urban-commuter use with predominantly short trips under 15 km, the DPF never reaches regeneration temperature and soot accumulates until active forced regeneration is triggered. If the driver ignores the warning and continues short-trip use the DPF reaches maximum soot loading and must be removed for professional cleaning or replaced. A restricted DPF causes limp-home mode (power capped to protect the turbo), and repeated forced regenerations accelerate engine oil dilution by unburnt diesel washing down the cylinder walls. This is a well-documented duty-cycle mismatch for this engine in any market with urban-dominated traffic patterns.

• DPF warning light (amber or red depending on soot load stage)
• Limp-home mode with power severely reduced
• Increased engine oil level between services (diesel dilution)
• Acrid or heavy exhaust smell during forced active regeneration
• Fuel consumption increase as ECU initiates late post-injection to raise DPF temperature

1. 1

   Check service history for evidence of predominantly urban short-trip use.

2. 2

   Check engine oil level — if above MAX mark, suspect diesel dilution from failed regenerations.

3. 3

   Ask whether any DPF warning lights have appeared.

4. 4

   If a workshop inspection is possible: OBD scan for DPF pressure differential data and soot load percentage.

5. 5

   A DPF pressure drop test or soot-load readout via diagnostic tool confirms remaining useful life.

Parts involved: Diesel particulate filter.

$600 to $3,200 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

• “What has been the typical trip length and driving pattern during ownership?”
• “Has the DPF warning light ever illuminated, and if so how was it resolved?”
• “Has the engine oil ever been found above the maximum mark at a service?”
• “Has the DPF ever been cleaned, removed for service, or replaced?”

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.