Fiat Grande Punto Diesel Particulate Filter DPF (2005-2012)

The Diesel Particulate Filter (DPF) on the Fiat Grande Punto, particularly the 1.3 Multijet 16v diesel models (75 or 90 hp) from 2005-2012, is an essential emissions control device. It traps up to 99% of fine soot particles from the exhaust gases, reducing harmful pollution and carcinogenic emissions. This filter is fitted in the exhaust system between the catalytic converter and the muffler.

The DPF works by filtering exhaust gases through a ceramic structure divided into microscopic channels that capture soot and ash particles. It uses two regeneration types to clean itself:

• Passive regeneration happens at high temperatures (over 350-500°C) during highway driving, burning off soot into harmless CO2 and water.
• Active regeneration is triggered by the engine management system when sensors detect filter clogging. It raises exhaust temperatures (~600°C) via additional fuel injection and EGR valve control to burn off soot.

Both processes help maintain filter efficiency and reduce backpressure on the engine.

Typical symptoms that indicate DPF problems include :

• DPF warning light illuminated on the dashboard.
• Engine entering limp mode or degraded performance.
• Loss of power and unusual smoke from the exhaust.
• Failed vehicle inspection due to emissions control faults.

Such signs mean the filter is clogged and the regeneration cycle may not be occurring properly, especially after lots of short urban trips.

Preventive maintenance can prolong the DPF’s main cycle life which is typically over 150,000 km with correct care. Recommended actions include:

• Taking at least a 20-30 minute motorway drive every 500 km to enable passive regeneration.
• Using specialist cleaning treatments annually or every 50,000 km.
• Performing forced active regeneration via diagnostic tools if light and error codes appear.
• Consider hydrogen decarbonisation to clean related engine parts (EGR, injectors) and keep the DPF operating efficiently.

Regular check-ups at a garage with Fiat diagnostic tools are advised for accurate fault detection.

Depending on the severity, you may choose :

• Basic cleaning without dismantling, involving 4L of cleaning fluids and code reset, suitable for mild clogging.
• Premium cleaning with up to 12L of aerospace-grade product plus hydrogen decarbonisation, recommended after 100,000+ km or significant clogging.
• Complete replacement with a new DPF unit referenced for your 1.3 Multijet engine.

Cleaning options are cost-effective alternatives to replacing the unit and can rescue the DPF in most cases.

Yes, once the DPF light comes on indicating active regeneration, you should not switch off the engine until the cycle completes. Stopping the engine prematurely can interrupt the regeneration process, causing further soot build-up and possibly triggering limp mode or error codes. It usually takes 5 to 15 minutes to complete depending on driving conditions.

Keeping the engine running ensures proper burning of trapped particulates and maintains filter efficiency.

The DPF is mainly fitted on the 1.3 Multijet 16v diesel engines made between 2006 and 2012, to comply with Euro 4/5 emission standards. Petrol models and some older diesel variants might not have a particulate filter installed. Verify your vehicle’s main reference number or engine code to check if your model specifically has a DPF fitted.

For a reliable DPF replacement or cleaning for the Fiat Grande Punto 1.3 Multijet diesel, look for parts with official reference numbers like SIC DPF-G5277S. Certified cleaning services offer both basic and premium options with valid guarantees. Specialist workshops may provide hydrogen decarbonisation and forced regeneration with diagnostic equipment to maintain your DPF’s main cycle and prevent costly repairs.

Always ensure parts correspond exactly to your car’s reference and that cleaning products used are safe and approved.