Fiat Ulysse Diesel Particulate Filter DPF

The DPF is an essential emission control device fitted on Fiat Ulysse diesel models since 2011. Positioned between the catalytic converter and the silencer, it traps up to 99% of harmful soot particles from exhaust gases. The filter uses a ceramic honeycomb structure with microscopic channels, alternately blocked, forcing exhaust gases through porous walls to trap particulate matter.

Its operation involves two main phases:

• Filtration : Solid particles accumulate on the filter walls, improving capture but increasing back pressure and potentially reducing engine power.
• Regeneration : There are two types:
  • Passive: At high engine temperature and speed (e.g., motorway driving), soot burns off naturally into CO2, water, and ash.
  • Active: Triggered by the engine control unit using sensors and techniques like post-injection to raise exhaust temperature to burn soot at lower loads. This cycle occurs every 500-700 km and lasts 5-15 minutes.

The Fiat Ulysse generation 220 (1994-2012) diesel models fitted with DPF include:

• 2.0 D Multijet RHR (from 05/2006 to 06/2011) - DPF reference PAM1212DPF
• 2.2 16V JTD 128 - known for DPF clogging issues due to particle trapping, worsened by short urban trips
• 2.0 JTD - replacement costs vary depending on version

DPF replacement costs for the Fiat Ulysse I 220 vary between €25 and €1308 for the part, with professional replacement costing between €1000 and €2500.

Signs of a clogged or malfunctioning DPF include:

• DPF warning light illumination
• Loss of engine power and reduced performance
• Presence of black smoke from exhaust
• Increased differential pressure indicating blockage

Typical causes are:

• Frequent short urban trips preventing full regeneration
• Accumulation of ash and soot particles in the filter

Yes, several maintenance methods exist to clean or regenerate the DPF in situ :

• Forced regeneration: Using a diagnostic tool to start a cleaning cycle, recommended especially for urban use.
• Additives: Added to fuel tank to lower soot combustion temperature.
• Specific DPF cleaners: Fuel additives that help dissolve soot deposits.
• Regeneration driving cycles: Periodic motorway runs at >3000 rpm for 20-30 minutes to promote passive regeneration.
• Regular decarbonization: Helps prolong DPF lifespan by reducing residue build-up.

It is important to monitor the EGR valve and turbo system during active regeneration cycles on diesel Fiat Ulysse models.

Replacement is required when:

• DPF is extensively clogged with ash residues that cannot be removed by cleaning or regeneration.
• Mechanical damage or deterioration of the ceramic filter structure occurs.
• Persistent faults cause repeated clogging and loss of performance despite maintenance efforts.

Complete DPF replacement is a professional job recommended for ensuring correct fitment and compliance with emission norms.

First, perform a DPF differential pressure check with diagnostic equipment. If elevated, try the following:

• Drive on a motorway for 20-30 minutes at engine speeds above 3000 rpm to enable passive regeneration.
• If the light persists, use a professional diagnostic tool to perform forced regeneration cycles.
• Check for additional related faults such as EGR valve or turbocharger problems.
• If symptoms continue, consult a garage for more detailed diagnostics and possible DPF replacement.

No, removing or disabling the DPF is illegal and can lead to fines and vehicle impoundment. The DPF is a legally required emission control device designed to reduce harmful diesel particulate emissions and protect the environment.

Always maintain and repair the DPF system to preserve your car’s emission compliance and performance.

Selecting the right DPF requires considering your vehicle’s specific engine code, model year, and emission standard. For example :

• 2.0 D Multijet RHR engine (05/2006-06/2011) uses a specific reference such as PAM1212DPF.
• 2.2 16V JTD engines will have distinct product codes to suit their specifications.

Always check product compatibility by vehicle VIN or consult a trusted parts provider. Using certified, high-quality DPFs manufactured with stainless steel and advanced ceramics ensures durability and compliance.

Professional advice and diagnostic checks help confirm product suitability and proper installation.