Renault Espace / Grand Espace Diesel Particulate Filter DPF

The Diesel Particulate Filter (DPF) on Renault Espace (notably Espace IV JK and Espace V JR) and Grand Espace Diesel engines is an anti-pollution device that traps fine particles such as soot, hydrocarbons, and carbon from exhaust gases. It helps the vehicle comply with European Euro 5/6 emission standards and works alongside the Exhaust Gas Recirculation (EGR) valve.

The DPF works by filtering exhaust gases through a ceramic honeycomb structure with porous walls where soot particles accumulate. To prevent clogging, the system regenerates by burning off the soot at temperatures between 550-650°C, achieved by post-injection, stopping the EGR, and turbo control.

• Active regeneration: triggered when soot reaches about 18g, based on pressure differential, gas temperature, lambda sensor, and driving style.
• Kilometric regeneration: automatic every 750-1000 km regardless of clogging level.

The DPF contains a ceramic body, gas temperature sensor, and a differential pressure sensor (max 50 mbar at idle).

Typical signs that indicate a faulty or clogged DPF include:

• Loss of engine power
• Increased fuel consumption
• "Check Engine" light turned on with codes P1435 Renault or P24A4 generic
• Excessive differential pressure above 50 mbar
• Reduced effectiveness leading to higher pollution and failing vehicle inspection

Addressing these symptoms early is important to maintain vehicle performance and emissions compliance.

Recommended DPF cleaning and regeneration procedures include:

• Route driving: Drive for 25-30 minutes at 60-80 km/h to reach regeneration temperature; tolerate up to 60g ash content.
• Forced active regeneration: Use diagnostic tools such as OBD Facile or VCDS to trigger regeneration and clear fault codes.
• Additives: Use Diesel DPF Cleaner or DPF-Regeneration+ additives to facilitate soot burn-off when added to the fuel or sprayed into the filter.

After cleaning, check engine oil and coolant levels to monitor for dilution or contamination.

Replacement intervals depend on the model and engine:

• For Renault Espace V 1.6 dCi 160: typically between 140,000 and 190,000 km, monitored via diagnostic tools.
• For Espace IV and Grand Espace Diesel engines: depends on engine variants; no fixed interval specified but monitor for clogging and performance loss.

Always avoid illegal removal of the DPF as it increases pollution and is against regulations.

DPF prices vary according to model and source, ranging roughly from €16 to €651 for Espace IV models. For Espace V, prices are typically not specified but depend on the exact reference and supplier. All parts should be original or brand-new to ensure quality and compliance.

Parts are usually available online or through specialist suppliers with warranty and technical support.

When purchasing or maintaining a Renault 2.6 Grand Espace diesel or similar models, consider these points:

• Check for symptoms of DPF clogging such as power loss, increased fuel consumption, and fault lights.
• Inquire about the last DPF maintenance or regeneration performed.
• Ensure engine oil and coolant are checked regularly to prevent DPF damage from contamination.
• Verify vehicle diagnostic reports for any stored error codes related to the DPF system.
• Consult with a garage or professional for pressure differential and saturation diagnostics specific to your model.

Proper maintenance prolongs the lifespan of the DPF and ensures compliance with emission standards.

Additional technical resources and support include:

• Professional diagnostic and regeneration tools (e.g., OBD Facile, VCDS) for error code reading and forced regeneration.
• Video tutorials on manual DPF regeneration and explanations of DPF structure on platforms like YouTube.
• Official repair manuals and service schedules from Renault specialists and garages.
• Direct factory support and installation manuals offered by manufacturers of DPF parts.
• Forums and communities for Renault owners sharing user experiences and troubleshooting.

Consult a trusted garage or professional for accurate diagnosis and maintenance advice tailored to your diesel Renault Espace or Grand Espace model.