Citroen C3 Picasso Diesel Particulate Filter DPF (2009-2017)

The Diesel Particulate Filter (DPF) on your Citroën C3 Picasso (usually on HDi engines such as 1.6 HDi or 1.5 HDi) captures fine soot particles from the exhaust gases to reduce harmful emissions. It does this by accumulating soot which is then burned off by thermal or chemical regeneration, often assisted by fuel post-injection or additives. This system is mandatory for Citroën C3 Picasso models from 2009 onwards to meet Euro 5 standards.

The DPF collects soot particles during normal engine operation and monitors pressure differences before and after the filter. When soot accumulation causes backpressure beyond set limits, the engine control unit (ECU) initiates regeneration. Regeneration raises exhaust temperatures to about 600°C to burn off soot, either by post-fueling injection or sometimes by adding additives like cerine. Additive levels are monitored via a reservoir, often located near the rear axle, and low additive warnings mean servicing is needed.

Typical signs of DPF malfunction include:

• Illuminated DPF warning light or an “antipollution fault” message
• Engine power loss and increased fuel consumption
• Messages like “Risk of DPF clogging” or engine fault codes detected by OBD

These symptoms often arise from incomplete combustion, depleted additive levels, buildup of soot from short urban trips, or related engine issues such as EGR or turbo blockage.

Solutions include:

• Injecting a DPF cleaning agent via the upper pressure sensor pipe to dissolve soot deposits
• Using hydrogen cleaning stations to decarbonize EGR, turbo and DPF components, improving performance and fuel efficiency
• Replacing the DPF with a new, certified unit when cleaning is insufficient
• ECU reprogramming on some engines (like 1.6 HDi 115 hp) to optimize regeneration management

Preventive measures include driving longer distances regularly to allow passive regeneration and monitoring additive levels and pressure sensor data regularly at your garage.

High-quality new DPFs compatible with Citroën C3 Picasso models are available directly from manufacturers specializing in stainless steel construction with certified European standards compliance (E24-103R). These filters offer superior durability and performance, and usually come with a 3-year warranty. Ordering direct from reputable suppliers ensures you get genuine parts suitable for your engine and emission standards.

The DPF additive, often stored in a reservoir near the rear axle, lowers the combustion temperature required to regenerate the filter by promoting soot oxidation. Approximately 4 ml of additive is consumed per fuel fill. When additive levels run low, your dashboard will warn you to refill or service the system to avoid filter clogging and engine damage.

• Always respond promptly to “Additive level low” warnings
• Use only approved additives as specified by your garage or manufacturer

Ignoring additive maintenance can lead to costly repairs or premature replacement of the DPF.

Replacement costs for a diesel particulate filter on a Citroën C3 Picasso generally range from several hundred to over a thousand euros, depending on the engine model and part certification. Cleaning and decarbonization treatments provide cost-effective alternatives when suitable. Always seek professional diagnosis and servicing at a trusted garage to avoid further engine damage.

It is generally not recommended to keep driving when a DPF warning light or “antipollution fault” is displayed. Continued driving with a clogged filter can cause loss of power, increased fuel consumption, and damage to engine components like the turbo or EGR valve. If the warning appears, arrange for diagnostic testing and repairs at your garage as soon as possible to avoid costly damage and ensure compliance with emissions regulations.

For safe driving:

• Drive longer distances periodically to allow for passive regeneration
• Stay alert to additive level warnings and pressure sensor alerts
• Seek professional help immediately if the warning persists

Proper maintenance saves you time, cost, and potential breakdown on the road.