Citroen Nemo Diesel Particulate Filter DPF (2007-2017)

The Diesel Particulate Filter (DPF) on Citroën Nemo diesel vehicles (such as 1.3 HDi 75 hp or 1.4 HDi 68 hp models) is an exhaust system component designed to capture harmful fine carbon particles from exhaust gases, reducing pollution alongside the catalytic converter. It operates through two main cycles: filtration, where soot accumulates on the filter walls, and regeneration, an automatic combustion process that removes these particles.

The DPF is installed in the exhaust line after the turbocharger, often combined with a catalytic converter. It is monitored by the engine control unit (ECU) using pressure and temperature sensors to detect filter saturation. During filtration, exhaust gases pass through porous cells trapping soot, which can reduce engine power if not periodically cleansed. Regeneration, either passive or active, automatically activates when soot load reaches a threshold, raising exhaust temperature above 600°C to burn off soot deposits safely.

The DPF can become saturated or clogged, especially with extended urban driving involving low speeds and frequent stops. This often triggers a warning light and message on the instrument panel. Persistent faults indicate exhaust system or DPF malfunction, requiring professional inspection. Water in the diesel fuel filter may also cause specific warning lights. The DPF light is managed via sensors and ECU diagnostics.

• Saturation Warning: Drive at ≥60 km/h and >2000 rpm continuously for 15 minutes to clear soot and turn off the warning light.
• Avoid stopping the engine during regeneration to prevent premature engine oil degradation.
• If issues persist, consult a qualified Citroën service center.

Ignoring these warnings can lead to reduced engine power, increased fuel consumption, and potential damage to the DPF and related components.

Regular maintenance helps ensure DPF longevity and vehicle performance. Recommended practices include:

• Performing a monthly drive over 30-40 km at sustained engine speeds to promote automatic regeneration, especially if mostly making short trips.
• Using approved DPF cleaning additives or aerosols suitable for the Citroën Nemo 1.4 HDi engine.
• Some DIY cleaning methods involve controlled injection of cleaning agents and engine running at higher revs, but these carry risks and should be undertaken cautiously.

Please rely on authorized service centers for professional diagnostics and cleaning or DPF replacement services to ensure quality and warranty compliance.

The Citroën Nemo diesel models with a DPF system generally do not require special fluids like urea (AdBlue) for their particulate filters. The DPF functions primarily through passive and active regeneration processes managed by the vehicle’s ECU and does not rely on consumable fluids. However, some cleaning additives designed for fuel systems may help maintain filter efficiency. Always use products recommended for the specific engine model to avoid damage.

Yes, resetting the ECU and resetting the DPF additive counter are distinct procedures:

• ECU Reset: This involves clearing codes and resetting engine management parameters, which may be necessary after replacing the DPF to ensure the engine runs correctly with the new filter.
• DPF Additive Counter Reset: This specifically resets the system that monitors DPF additive consumption or regeneration cycles, which is critical for accurate filter maintenance tracking.

Both resets are important but are typically performed separately with specialized diagnostic tools at a professional workshop.

DPF faults can lead to several vehicle problems that impact drivability and engine health, including:

• Reduced engine power and acceleration
• Increased fuel consumption due to impaired exhaust flow
• Frequent warning lights and error codes
• Potential damage to engine oil from interrupted regenerations
• Risk of costly damage if clogged filters are not addressed promptly

Early diagnosis and maintenance are important to avoid these issues and ensure the DPF system operates optimally.

For quality, durable, and certified replacement DPFs specifically made for the Citroën Nemo (including 1.3 HDi and 1.4 HDi diesel engines), choose products from trusted European manufacturers like Krosfou. These new DPFs are made with high-grade ceramics and INOX 409 stainless steel, offering superior performance and a 3-year warranty. Direct factory sourcing ensures competitive pricing, fast delivery across Europe, and professional technical support.

When replacing your DPF, always ensure the catalytic converter and related sensors are in good condition and replaced if needed to maintain system efficiency and comply with regulations.

Check product compatibility carefully by model and engine code to get the perfect fit and performance.