Citroen C2 Diesel Particulate Filter DPF (2003-2009)

The Diesel Particulate Filter (DPF) in the Citroën C2 Diesel is an essential component of the exhaust system that captures harmful fine particulate matter released by diesel engines. It filters out carcinogenic soot and particles from exhaust gases to reduce pollution and comply with emission standards, especially in models equipped with the 1.6 HDi engine.

The DPF is placed after the turbo and catalytic converter in the exhaust line, trapping soot in its porous structure. It features an automatic regeneration process where the engine control unit monitors differential pressure and temperature sensors to detect soot buildup. When necessary, post-injections of fuel raise exhaust temperature to around 600°C, burning off the soot and cleaning the filter. A special additive (such as Eolys used by PSA) lowers the combustion threshold of particulates, improving regeneration effectiveness.

Optimal regeneration usually happens every 350-800 km on long or high-speed trips, with the system limiting engine speed if overload is detected. The intake air heater can also assist regeneration by maintaining engine torque.

Common problems with the DPF on the Citroën C2 Diesel include premature clogging, mainly due to frequent short urban trips preventing full regeneration. Symptoms include smoking at startup, power loss, illuminated warning lights, and engine rev limiter activation. Excessive soot buildup leads to high differential pressure, which can block regeneration and cause the vehicle to enter a degraded mode. The DPF typically lasts between 80,000 and 140,000 km depending on maintenance and driving conditions.

• DPF pressure sensor faults
• Excessive back pressure reducing engine performance
• DPF overheating or damage due to interrupted regeneration

If these issues occur, diagnostic scanning and professional inspection are recommended.

To maintain the DPF and prevent clogging:

• Take regular long drives on highways at engine speeds above 2200 RPM to enable automatic regeneration (about 30-40 km at 2500-3000 RPM once a month if mostly urban driving)
• Check and maintain proper additive levels in the dedicated reservoir
• Avoid frequent short trips where the engine does not reach full operating temperature
• Ensure the exhaust and EGR systems are leak-free and functioning properly

Professional diagnostic tools can also force DPF regeneration and reset fault codes if needed.

If the DPF is clogged or faulty, these main solutions apply:

• Forced regeneration at a garage: Using diagnostic tools to initiate high-speed post-injection cleaning cycles and reset additive levels.
• Manual or chemical cleaning: DPF can be removed and chemically cleaned if not excessively clogged.
• Replacement of the DPF: If cleaning is insufficient, a new DPF can be installed. Replacement requires ensuring the pressure sensors and related components are correctly installed and functioning.

Always consult professionals and use genuine parts meeting manufacturer and European standards to ensure warranty and performance.

Most Citroën C2 Diesel models, especially those with the 1.6 HDi engine, are equipped with a Diesel Particulate Filter (DPF) as part of the exhaust pollution control system. Some earlier or smaller engine variants such as 1.1 or 1.4 may not have a DPF depending on market and year. Checking your vehicle’s documentation or consulting a professional with the VIN and model information can confirm DPF presence.

Krosfou offers brand-new, high-performance DPF replacement parts manufactured in Europe with premium quality INOX 409 stainless steel and advanced ceramic substrates. All products come with:

• A 3-year warranty limited to 100,000 km of use
• Free returns within 30 days if unused and in original packaging
• Compliance with European E24-103R certification ensuring technical compatibility with vehicle emission standards
• Technical support and installation guides available upon request

Ordering from the factory ensures highest quality parts that meet or exceed manufacturer specifications for your Citroën C2 Diesel DPF needs.

For further information, troubleshooting, and detailed guides, consider these resources:

• Technical YouTube videos explaining DPF function and maintenance for PSA vehicles
• Online automotive forums with real user experiences on Citroën C2 diesel DPF problems
• Professional diagnostic tools such as Diagbox recommended for precise fault detection and forced regenerations
• Consultation with certified garages specializing in PSA and Citroën exhaust systems

Always rely on expert diagnostics for accurate assessment and avoid removing or bypassing the DPF, which is illegal and harmful to the environment.

Protect your vehicle and the planet by following manufacturer-recommended maintenance and using quality parts from trusted suppliers.