Citroen Berlingo Diesel Particulate Filter DPF

The Diesel Particulate Filter (DPF) fitted on Citroën Berlingo diesel engines captures harmful soot particles (carbon core with hydrocarbons, sulfate, sulfur, and metallic oxides) emitted from the diesel engine. It reduces emissions by up to 99.9% thanks to a porous ceramic structure (silicon carbide) located after the catalytic converter in the exhaust system.

Citroën Berlingo diesel models often use an additive system that lowers soot combustion temperature to 450°C (from 550-600°C), enabling passive regeneration on highway drives and active regeneration using post-combustion fuel injection to heat the catalytic converter.

• Passive Regeneration: Soot burns off during long or fast driving when exhaust gases are hot (>450°C), leaving ash stored in the filter.
• Active Regeneration: Triggered by the engine control unit if the filter is saturated, with the engine running at 2200-4000 rpm and fuel post-injected to heat the catalytic converter, burning soot effectively.
• Overload Warning: The DPF warning light indicates excessive clogging, requiring cleaning or replacement.

This process is designed to be transparent to the driver under suitable driving conditions.

The DPF is fitted on various Citroën Berlingo diesel models including:

• Berlingo Van B9 (since 2020), with 1.6 BlueHDi engine, Euro 6 standard, approximately 9.1-10 kg DPF weight.
• Berlingo 2 Van with 1.6 BlueHDi 120 CV (DV6FC engine), Euro 6 compliant.
• Berlingo HDi 90 diesel models, where DPF clogging warnings are frequent.

These DPFs often incorporate advanced ceramic technology and additive systems specific to PSA (Citroën/Peugeot) vehicles.

DPF replacement is a relatively easy procedure involving:

• Removing the exhaust line components (hoses, lambda sensors, pressure sensors, flanges).
• Draining the additive tank if the system uses additives.
• Installing a new DPF and resetting the system using diagnostic tools to clear faults and reset the DPF system.
• Performing a forced regeneration: typically engine idling for 2 minutes, then revving to 4000 rpm with post-injection until soot is burned off.

DPF cleaning options include forced regeneration, ultrasonic cleaning, or physical removal and cleaning. Using good quality fuel and oil, plus regular highway drives, can prevent premature clogging.

The DPF is integrated in the exhaust system, typically positioned after the catalytic converter and before the turbocharger outlet or along the exhaust pipe. It is generally visible on the exhaust line near the engine or turbo.

This placement ensures effective filtration of particulate matter from exhaust gases before they exit the vehicle.

Common problems include:

• Clogging due to frequent short trips or city driving at low engine load, preventing effective passive regeneration.
• Accumulation of ash that cannot be burned off, leading to system overload.
• Illumination of the DPF warning light indicating excessive particulate buildup.
• Issues with additive levels or sensors monitored by the engine ECU.

Regular highway driving, quality maintenance, and timely servicing are recommended to avoid these problems.

Diagnostic tools such as OBD scanners (e.g., PP2000, Lexia) are used to read error codes related to DPF pressure sensors, lambda sensors, and additive system status.

• Perform regeneration procedures when indicated by the ECU.
• Reset the DPF warning light after maintenance or replacement using diagnostic software.
• If persistent errors occur, consult a PSA authorized garage for expert diagnosis.

Proper diagnostics help ensure the engine and DPF system operate efficiently and emissions comply with regulations.

To maintain the DPF in good condition and enhance its lifespan, it is recommended to:

• Drive regularly on roads or highways at speeds that allow the engine and exhaust temperatures to reach levels suitable for passive regeneration (above 450°C).
• Use high-quality fuel and engine oil optimized for diesel particulate filters.
• Follow routine servicing and check additive fluid levels if applicable.
• Avoid frequent short trips or prolonged idling that keep exhaust temperatures low.
• Address warning lights or driving anomalies immediately with proper diagnostics.

By following these practices, you reduce the risk of DPF clogging and ensure compliance with emission standards for your Citroën Berlingo diesel model.