Peugeot 3008 Diesel Particulate Filter DPF

The DPF is a ceramic filter installed in the exhaust line after the catalytic converter. It traps harmful soot particles emitted by the diesel engine, which are composed of carbon cores mixed with hydrocarbons, sulfates, sulfur, and metal oxides. It plays a crucial role in reducing emissions from your Peugeot 3008 diesel car.

The DPF removes soot through two types of regenerations:

• Passive regeneration: Occurs automatically during long motorway drives when exhaust gas temperatures reach 550-600°C, burning off soot accumulated in the filter.
• Active regeneration: Triggered when the filter's soot load is high, the engine injects extra fuel to raise the filter temperature to around 450°C using a specific PSA additive like cérine or D Blue, which lowers the combustion threshold.

For models equipped with an additive system (e.g., Peugeot 3008 1.6 HDi 110 ch), a dedicated additive tank and pump assist regeneration by injecting the additive into the fuel.

A clogged or defective DPF in your Peugeot 3008 diesel may cause:

• Illumination of the "Check Engine" light or a specific DPF warning on the dashboard.
• Loss of engine power due to restricted exhaust flow.
• Increased fuel consumption.
• High differential pressure readings in diagnostics (e.g., 18-31 mbar at idle).
• Engine vibrations, low additive levels, or error codes like P2463.

A critical soot level is between 40-50g, above which automatic regenerations become insufficient, and blockage requires intervention.

Using a diagnostic tool such as the PSA-specific Diagbox software allows you to:

• Measure soot load levels in the filter (e.g., 100% saturation indicates blockage).
• Check differential pressure and retrieve related error codes.
• Confirm if regeneration is needed and initiate forced regeneration if necessary.

Visual signs include flashing DPF warning lights and degraded engine mode. Professional garages offer comprehensive ECU diagnosis and error reset services.

The main DPF regeneration and cleaning methods are:

• Passive regeneration: Naturally occurs during long drives at high speeds when the exhaust temperature exceeds 550°C.
• Forced regeneration: Performed using Diagbox, either at a standstill or while driving, involves heating the filter to burn soot (~30-40 min at standstill).
• Chemical cleaning: Adding special additives (e.g., Wynn’s DPF products) to dissolve soot and ash followed by driving to flush the filter.
• Additive reservoir refill and reset: For models with additive systems, refilling the additive tank (cérine) and performing the required resets via diagnostic tools.

Regular regeneration helps reduce fuel consumption, emissions, and extends the engine's life, but does not fix physical defects or ash buildup inside the DPF.

DPF regeneration frequency depends on driving habits and conditions:

• Regular long-distance or motorway drives promote passive regeneration to keep the DPF clean automatically.
• Frequent short trips or city driving may require active or forced regeneration more often due to insufficient exhaust temperature.
• Monitoring DPF soot levels via diagnostic tools helps determine the right time for regeneration or cleaning.

Preventive maintenance includes checking additive levels and ensuring the pump system is operational for Peugeot 3008 models equipped with additives.

Yes, the DPF can be replaced by dismantling the exhaust line after the catalytic converter. Replacement parts are available specifically for Peugeot 3008 diesel engines, notably the 1.6 HDi 110 hp version.

• Replacement is a relatively straightforward mechanical procedure.
• Original high-quality DPFs made from stainless steel with advanced ceramic monoliths provide durability and efficiency.
• It is recommended to replace adjacent components like catalytic converters if applicable.

Consult a professional garage for proper fitting and calibration if needed.

Keep your DPF in good condition by following these advice:

• Prefer regular longer drives on roads or motorways to enable passive regeneration.
• Check and refill the additive reservoir (cérine) when necessary, resetting the system via diagnostic tools.
• Use high-quality PSA-compatible additives like D Blue for effective regeneration.
• Regularly inspect the additive pump and related components, as failure leads to rapid clogging.
• Maintain consistent engine service intervals and ensure the engine reaches its optimal operating temperature.

Following these tips reduces the risk of blockage, lowers fuel consumption, and helps pass emission controls.