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

The DPF in the Fiat Grande Punto (notably diesel models like the 1.3 Multijet 16v 75 or 90 hp from 2005-2012) is an essential component of the exhaust system. Positioned after the catalytic converter and before the silencer, it captures up to 99% of fine soot particles from combustion to significantly reduce harmful and carcinogenic emissions, meeting Euro 4/5 standards.

The DPF traps soot and ash in a ceramic structure made of about 50 microscopic channels per cm², which filters exhaust gases. It undergoes passive regeneration at high temperature (on highways) where soot burns into CO2 and H2O, and active regeneration initiated by the engine control unit involves additional fuel injection and turbo control to heat gases (~600°C), burning accumulated soot in 5-15 minutes every 500-700 km depending on use. Additives can lower combustion temperature to aid regeneration.

DPFs are mainly fitted on diesel-powered Fiat Grande Punto models with the 1.3 Multijet 16v engine producing 75, 90 or 95 hp from 2006 to 2012. Petrol versions and some diesel variants do not have a DPF.

• 1.3 Multijet Diesel engines with OEM reference like 1.3 MJ 75 hp
• Models from 2005 to 2012

Usage patterns influence DPF lifespan and maintenance needs.

Signs of a clogged or failing DPF include:

• Illuminated DPF warning light
• Reduced engine power or limp mode
• High exhaust back pressure
• Failure during technical inspection / emissions test

Frequent short urban trips accelerate clogging by preventing adequate regeneration.

Preventive maintenance is recommended every 50,000 km. In urban or short-trip usage, clogging can occur after 100,000 km or less.

• Regular highway drives of 20-30 minutes every ~500 km support passive regeneration
• Professional cleaning intervals depend on vehicle use

Manual regeneration with diagnostic tools is advised when warning lights appear.

Options include:

• Basic cleaning without removal using specialized fluids and diagnostic code reset
• Premium cleaning with larger-volume homologated products plus hydrogen decarbonation for extensive deposits
• Hydrogen decarbonation of the engine system to reduce related deposits and improve DPF lifespan
• DPF replacement when cleaning is insufficient, using brand-new high-quality stainless steel filters compliant with manufacturer specs

Prices vary based on the service or replacement selected.

Yes, forced regeneration can be triggered using diagnostic tools (valises) that command the engine to perform the active cleaning cycle even in unsuitable driving conditions like city trips. This helps avoid early clogging and maintains filter efficiency.

• This procedure takes 5 to 15 minutes
• It is recommended when the DPF warning light is on or after many short trips

Professional diagnosis ensures correct timing and execution.

To maintain your DPF in optimal condition, consider the following best practices:

• Drive regularly on highways to reach necessary exhaust temperatures for passive regeneration
• Use approved fuel additives if recommended for your engine
• Perform regular maintenance checks including EGR valves and injectors to avoid soot buildup
• Avoid frequent short trips that prevent the engine from reaching full operating temperature
• Seek professional cleaning or forced regeneration at the first warning signs

Following these guidelines can extend the DPF's operational life beyond 150,000 km and reduce maintenance costs.