Volkswagen Sharan Diesel Particulate Filter DPF

The Diesel Particulate Filter (DPF) is a crucial component integrated into the exhaust system of Volkswagen Sharan diesel engines. It captures harmful soot particles produced during diesel combustion, helping reduce pollution and ensure compliance with Euro 5/6 standards.

DPFs are fitted primarily on Volkswagen Sharan II models (7N1, 7N2) equipped with 2.0 TDI diesel engines, including power variations of 140 CV and 177 CV. These have engine codes such as CFFE, CUVA, CFFA, CFFB, CFGB, and CFGC, from January 2010 onwards.

The DPF captures fine soot particles, but over time it becomes clogged, reducing engine performance and possibly triggering warning lights or limp mode. This clogging is mainly caused by frequent short urban drives where the DPF cannot reach the temperature needed for natural regeneration (burning off soot).

• Soot buildup reduces exhaust flow and increases back pressure on the engine.
• Short trips prevent the DPF from reaching the optimal temperature for soot combustion.
• Warning lights may illuminate indicating the need for regeneration or maintenance.

DPF clogging affects emissions, fuel consumption, and engine health if not addressed.

To regenerate the DPF without removal, specific driving conditions should be met to allow high-temperature soot combustion (regeneration):

• For 2.0 TDI 140 CV: Drive continuously at 60-80 km/h for 25-30 minutes, ideally on a motorway.
• For 2.0 TDI 177 CV: Maintain a speed of 60-75 km/h for 26-30 minutes.

If natural regeneration is not effective, a forced regeneration can be performed using a diagnostic tool via the vehicle's OBD port. Professional cleaning services may also be recommended to avoid premature DPF replacement.

Common indications that the DPF is clogged include:

• Illuminated DPF warning light on the dashboard.
• Reduced engine power or performance losses.
• Increased fuel consumption and excessive exhaust smoke.
• Engine entering limp mode to protect itself.
• Unusual exhaust pressure sensor readings due to blockage.

It is important to investigate and address these symptoms promptly to avoid severe engine damage.

DPF cleaners may aid in removing soot deposits and ash build-up inside the filter. However, their effectiveness depends on the level of clogging and the core issue causing it. Combining DPF cleaning with proper regeneration driving cycles is essential for best results.

Note that some problems require professional intervention or DPF replacement if damage or severe blockage is present.

• DPF cleaners mainly work on reducing soot and ash buildup.
• They do not fix sensor or engine-related issues causing excessive soot.
• Cleaning chemicals should be used with caution and according to manufacturer guidelines.

Accessing or replacing the DPF on a Sharan requires removing parts of the exhaust system, including:

• Connecting pipes around the DPF unit.
• Oxygen (lambda) sensors and pressure sensors attached to the filter housing.
• Potentially catalytic converters joined to the DPF in combined units.

Because of this complexity, DPF replacement or cleaning is best performed by a professional technician with the correct tools to safely disconnect and refit sensors and exhaust components.

Owning a TDI Sharan with a DPF involves some additional maintenance responsibilities to ensure proper DPF function and longevity:

• Periodic regeneration driving to prevent clogging.
• Monitoring and addressing warning lights promptly.
• Occasional professional DPF cleaning or forced regeneration.
• Potential replacement costs after extended use or damage.

Maintaining correct driving habits and servicing helps reduce unexpected costs and prolongs the effective life of the DPF and related components.