Fiat Ulysse Diesel Particulate Filter DPF

The Diesel Particulate Filter (DPF) on Fiat Ulysse diesel models is an exhaust system component designed to capture harmful fine particulate matter (carcinogenic soot) generated during diesel combustion. It is typically found on models with engines such as the 2.2 16V JTD 128 hp from 2004-2006. Its function is to reduce emissions and protect the environment.

The Fiat Ulysse DPF is positioned after the turbocharger and works through two main cycles:

• Filtration: Exhaust gases pass through the filter where soot particles are trapped, forming a layer of ash.
• Regeneration: The filter is heated to high temperatures (over 550-600°C) to burn off the soot, converting it mainly to CO2.

Sensors monitor differential pressure and temperature to trigger regeneration automatically when required. Some models use cerium-based catalytic additives to lower regeneration temperature and improve cleaning efficiency.

Common signs of DPF issues include:

• Increased fuel consumption
• Engine power loss due to exhaust obstruction
• Illumination of the Check Engine warning light
• General decrease in vehicle performance linked to soot accumulation

Timely diagnosis and maintenance are important to prevent more severe damage or costly repairs.

DPF cleaning and regeneration methods include:

• Manual Regeneration: Driving the vehicle at 60-80 km/h for 25-30 minutes to reach the required temperature for soot combustion.
• Forced Regeneration: Using diagnostic tools like VCDS to initiate active regeneration cycles.
• Cleaning Products: Specialized DPF cleaners such as Wynn's DPF Cleaner can be used to dissolve soot build-up.
• Additives: Catalytic additives help regeneration at lower temperatures but can increase ash accumulation over time.

Regular maintenance includes avoiding short trips and favoring highway driving to support passive regeneration.

The recommended replacement interval for the DPF is typically between 120,000 and 200,000 km to avoid failures and performance loss. Replacement is necessary if cleaning and regeneration efforts fail or when the filter is too clogged with ash or damaged. The DPF parts available are high-quality ceramic-based and conform to manufacturer specifications for Fiat Ulysse and compatible vehicles like Citroën C8 2.0 HDI.

After the DPF has been filled with soot and ash beyond the maximum tolerance (e.g., max 60 g ash), manual or forced regeneration may not be sufficient. In such cases, professional cleaning or replacement will be necessary. Continuous use of additives can speed up ash accumulation and reduce DPF lifespan.

• Regeneration effective for soot, less so for ash accumulation
• Ash accumulation can block the filter permanently
• Replacement required when cleaning no longer restores performance

Regular monitoring via OBD and maintenance reduces risk of complete blockage.

Krosfou offers brand-new, stainless steel DPFs with a 3-year warranty valid up to 100,000 km, manufactured in Europe with advanced ceramic monoliths. These products are TÜV SÜD certified to deliver equal or superior quality to original parts. Customers benefit from free returns within 30 days if the product is unused and original, and direct factory support for technical questions.

• 100% European manufacturing with strict quality control
• Manufactured using stainless steel INOX 409 and high-performance ceramics
• Compliance with latest emission regulations and standards
• Free returns within 30 days for eligible products
• Warranty requires professional installation and correct usage

Negligent misuse such as clogging due to short driving cycles voids warranty coverage.

Key tips for DPF longevity include:

• Avoid frequent short trips that prevent the engine reaching regeneration temperature
• Prefer highway or continuous running at moderate speed (60-80 km/h) for passive regeneration
• Use premium diesel fuel to reduce soot formation
• Regularly check and replace sensors, injectors, and gaskets as recommended
• Perform forced regeneration with diagnostic tools if needed when the Check Engine light appears

These practices optimize DPF function, help maintain engine performance, and preserve emissions control systems.

For detailed diagnostics, use OBD code scanners and consult expert forums or tutorials specific to your model.