Citroen C4 Grand Spacetourer Diesel Particulate Filter DPF (2018-2022)

The DPF is an essential anti-pollution device that captures and eliminates fine soot particles produced by the diesel engine of your Citroën C4 Grand Spacetourer. It helps the vehicle comply with strict European environmental standards by reducing harmful emissions.

The DPF works through two main regeneration processes:

• Passive regeneration: Occurs when exhaust gases reach about 550 to 600°C during high-load trips such as motorway driving, burning soot particles naturally.
• Active regeneration: Triggered when conditions are insufficient for passive regeneration; the engine management injects fuel into the exhaust to raise the filter's temperature and burn off the particles.

Burned particles turn into ash, which gradually accumulates and requires maintenance.

The DPF is situated within the exhaust system, generally under the vehicle floor, positioned after the catalytic converter. In some newer models, the DPF may be integrated directly into the same metallic structure as the catalytic converter.

The DPF typically requires cleaning or replacement between 120,000 and 180,000 kilometres, depending on your driving conditions and vehicle maintenance. Proper maintenance ensures optimal performance and longevity.

Replacing the DPF involves several key steps:

• Lifting the vehicle securely to access the exhaust system
• Disconnecting the exhaust system components surrounding the DPF
• Removing the old DPF unit
• Installing the new DPF and ensuring proper connection and fixation
• Running a diagnostic tool to reset parameters and verify correct operation

This procedure should be carried out by a qualified professional or an authorised garage to ensure safety and compliance.

DPFs are manufactured from various materials designed for durability and filtration efficiency:

• Ceramic: Commonly used for diesel engines due to its heat resistance and filtering properties.
• Cordierite: A cost-effective ceramic material option found in some filters.
• Silicon Carbide (SiC): Chosen for its high temperature resistance, mechanical strength, thermal conductivity, and superior filtration efficiency.

Each material contributes to the DPF's effectiveness in trapping pollutants while enduring the harsh exhaust environment.

Preventive maintenance tips include:

• Regularly driving at sustained high speeds (e.g., motorway journeys) to enable passive regeneration at high exhaust temperatures (above 550°C)
• Using appropriate fuel additives formulated to support DPF cleanliness
• Ensuring the Eolys additive system, commonly located near the fuel tank, is properly topped up to assist regeneration

These practices help avoid premature clogging and extend the DPF lifespan.

Common symptoms indicating a saturated DPF include:

• Engine hesitation or rough running ("brouter")
• High soot load indicated on diagnostic tools, with saturation around 76% or more
• Warning lights or messages related to the particulate filter on the dashboard

If these symptoms appear, it is advisable to have the DPF checked and cleaned or replaced promptly to avoid engine damage.

For replacement and spare parts, trusted products that meet strict European regulations and offer reliable performance are available with warranty and factory certification. Delivery options and prices can be checked online directly from professional suppliers.