Citroen C4 Grand Picasso Diesel Particulate Filter DPF

The Diesel Particulate Filter (DPF) on the Citroën C4 Grand Picasso, especially in diesel versions like 1.6 HDi or 2.0 HDi, is an emission control device located in the exhaust system after the catalytic converter. It captures fine soot particles from the diesel engine and periodically burns them through a regeneration process into less harmful gases, helping the vehicle comply with EURO emission standards.

Not all engine versions have a DPF; mainly diesel engines have it installed. Below is a summary:

• 1.6 HDi 109, 110, 112 hp – with DPF
• 2.0 HDi 136, 138, 150, 163, 165 hp – with DPF
• Gasoline engines such as 1.6 16V 150 hp, 1.6 THP 140, 155 hp – without DPF
• 1.2 i 12V GPF 110 hp (gasoline) – equipped with a Gasoline Particulate Filter (GPF)

Diesel engines are the primary models with DPF fitted.

The DPF is located under the vehicle, typically after the catalytic converter in the exhaust system. It is often integrated or close to the catalytic converter and connected to a reservoir containing the additive cérine Eolys to help its regeneration process.

• The filter is made from silicon carbide or cordierite materials, with silicon carbide preferred for durability and filtration efficiency.
• Access for maintenance requires lifting the vehicle and disconnecting components of the exhaust system.

Professional installation or replacement is recommended, though DIY guides exist.

To maintain your DPF’s efficiency and lengthen its lifespan, consider these tips:

• Drive regularly on highways at speeds allowing engine rpm above 3,000 to enable passive DPF regeneration.
• Use fuel additives specially designed to help keep the DPF clean.
• Schedule periodic professional cleanings as recommended between 120,000 and 180,000 km depending on your driving habits.
• Avoid frequent short trips that prevent full regeneration.

Check the cérine additive reservoir regularly and refill as needed for proper regeneration functionality.

Replacement costs vary based on model and engine version. Typical price ranges including parts and labour at garages are between 1,074 € and 1,400 € minimum. For example:

• 1.6 HDi 110/112 hp: 158 - 281 € (approx), labour about 54 minutes
• 2.0 HDi versions: 144 - 297 € (approx), labour about 54 minutes
• 1.6 THP petrol versions can be higher due to different filter types

Costs include removal, replacement, and reinstallation. Always request a personalised quote for exact pricing.

Signs of DPF issues may include:

• Dashboard warning lights indicating filter clog or regeneration failure.
• Loss of engine power or increased fuel consumption.
• Unusual exhaust smoke or smell.

Use an OBD diagnostic tool to check for error codes related to the DPF and reset parameters after replacement or cleaning.

While some fuel additives can help maintain the DPF’s cleanliness during normal operation, professional cleaning involving removing the DPF and specialised equipment is recommended for thorough cleaning.

• DIY cleaning is limited to regeneration driving techniques and additives.
• Professional cleaning restores filter efficiency and avoids damage.

Regular maintenance helps avoid costly replacements and ensures emission compliance.

Quality replacement Diesel Particulate Filters for the Citroën C4 Grand Picasso are available from specialised manufacturers offering new original parts with high durability and performance.

• They are made from stainless steel INOX 409 with advanced ceramic monoliths certified to meet or exceed European standards.
• Products come with a 3-year warranty covering up to 100,000 km usage.
• Professional support and installation guides are often provided along with warranty coverage.

Choosing certified products ensures compatibility, optimal performance, and environmental compliance of your vehicle’s emission system.

For installation, a qualified mechanic or professional tool is recommended to perform fitting and OBD resetting properly.