Citroen C6 Diesel Particulate Filter DPF (2005-2012)

The DPF on Citroën C6 diesel engines (such as 2.2 HDi, 2.7 HDi, 3.0 HDi, V6 HDi 240) is an anti-pollution device installed after the catalytic converter and before the silencer. It captures up to 99% of fine soot particles from diesel exhaust gases, reducing pollution and health risks.

Inside, it contains a ceramic honeycomb structure with thousands of microscopic channels that trap soot particles. Over time, soot builds up causing increased backpressure and diminished engine power.

There are two types of DPF regeneration to burn off soot deposits:

• Passive regeneration : Happens naturally during full-load driving when exhaust temperatures exceed 550 °C, converting soot into CO₂ and water vapor.
• Active regeneration : Triggered by the vehicle's computer when soot levels and backpressure rise, activating measures like EGR valve adjustments, post-injection fuel, and turbo boost to raise exhaust temperature above 450-550 °C for 5-15 minutes.

Additional regeneration help comes from additives like Cerine/Eolys that lower the combustion temperature of soot by about 100 °C, used especially in the 2.7 HDi engines.

Common symptoms of a clogged DPF include :

• Loss of engine power and reduced acceleration
• Increased fuel consumption and frequent regeneration cycles
• Illumination of the anti-pollution warning light on the dashboard
• Higher exhaust backpressure detected by sensors

If these signs occur, it's recommended to consult a garage equipped with a Citroën diagnostic box (Lexia/PP2000) to accurately diagnose and, if needed, perform a forced DPF regeneration procedure.

Proper DPF maintenance includes :

• Regularly driving the car under conditions that allow passive regeneration (steady highway driving at full load)
• Monitoring and refilling the Cerine/Eolys additive reservoir for applicable engines, especially 2.7 HDi, to ensure efficient active regeneration
• Addressing warning messages promptly and avoiding short trips where regeneration cannot complete
• Having a mechanic perform a forced regeneration via diagnostics tools if required

DPF lifespan ranges from 100,000 to 200,000 km depending on vehicle use and maintenance. Over time, irreversible ash accumulation necessitates cleaning or replacement.

Yes, depending on your Citroën C6 engine model the DPF references differ:

• 2.2 HDi: References include 1706G4, 1731NR, 1731SA with equivalents sold in the aftermarket; these DPFs are compatible with direct fit.
• 3.0 HDi (241 HP): Specific references less commonly detailed, but symptoms of clogging include loss of power and high backpressure.
• V6 HDi 240 Biturbo: Special DPF regeneration possible with reprogramming or diagnostic tools.
• 2.7 HDi: Uses additive system, and monitoring additive level is critical to prevent errors.

Always ensure to use original or equivalent quality DPFs that comply with manufacturer specifications to maintain emission standards and vehicle warranty.

A clogged DPF can sometimes be restored by forced regeneration procedures using diagnostic tools. However, persistent clogging caused by ash buildup will eventually require professional cleaning or replacement. Avoid removing or deleting the DPF as it is illegal in Europe and harms the environment.

• Forced regeneration performed using Citroën diagnostic boxes (e.g., Lexia or PP2000)
• DPF cleaning services available at specialized garages
• Replacement recommended when cleaning is ineffective or damage occurs

Regular maintenance and timely additive refills significantly extend DPF life.

For quality DPF parts matching Citroën specifications, choose manufacturers certified by TÜV SÜD for superior or equal original equipment quality. Krosfou offers brand-new DPFs made in stainless steel with advanced ceramic monoliths and a 3-year warranty, suitable for many Citroën C6 engines.

• Reliable parts come with full technical support and compatibility confirmation by VIN or reference
• Professional mechanics and garages use genuine software tools for troubleshooting and forced regeneration
• Krosfou also offers a PRO corner for professionals with loyal discounts, fast delivery, and buy-back programs for used DPFs

Always rely on trusted suppliers and service providers to maintain emission compliance and vehicle safety.

Certain Citroën C6 diesel engines, especially the 2.7 HDi, require Cerine or Eolys additives to lower soot combustion temperatures for efficient DPF regeneration at lower exhaust temperatures. The additive reservoir must be checked and refilled when a warning message appears.

Additionally, some DPFs use AdBlue with SCR (Selective Catalytic Reduction) systems to reduce NOx emissions; however, this is engine and model specific.

• Check owner's manual for specific guidance on additive requirements
• Ignoring additive refill can result in anti-pollution system errors and possible engine derating
• AdBlue is separate from the DPF additive and is part of emission control systems in newer diesel vehicles

Proper additive care ensures effective DPF function, reduces maintenance issues, and extends filter life.