Description

This listing is for a comprehensive DPF cleaning service for the Citroen C4 1.6 HDi, specifically for models manufactured between 2004 and 2011 with engine codes 9HX or 9HZ, meeting Euro 5 emissions standards. The Diesel Particulate Filter (DPF) is a critical component of your vehicle’s exhaust system, designed to capture and store harmful soot particles from the diesel engine, preventing their release into the atmosphere. Its proper function is essential for both environmental compliance and engine performance.

Common failure modes for DPFs primarily revolve around clogging and, less frequently, physical damage. Clogging typically occurs when the DPF’s self-cleaning process, known as regeneration, is unsuccessful or incomplete. This can be triggered by frequent short journeys, incorrect engine oil type, faults with engine sensors (like differential pressure or temperature sensors), issues with fuel injectors, or a malfunctioning Exhaust Gas Recirculation (EGR) valve. When a DPF becomes excessively blocked, it restricts exhaust flow, leading to reduced engine power, increased fuel consumption, and dashboard warning lights. Physical damage can result from impacts, thermal shock due to extreme temperature fluctuations, or excessive internal pressure from severe blockages.

What this diesel particulate filter (DPF) fits

This DPF unit is specifically designed for:

• Vehicle: Citroen C4 1.6 HDi
• Engine Codes: 9HX / 9HZ
• Year Range: 2004-2011
• Euro Class: Euro 5
• Original Equipment (OE) Part Number: BM11024
• Alternative Part Number: 9686247880

At Gap Turbos, we offer a professional DPF cleaning service for this unit. Our process involves advanced workshop ultrasonic and thermal cleaning techniques, which effectively remove accumulated soot and ash from the DPF’s ceramic substrate, restoring its filtration efficiency and exhaust flow. This cleaning service is a highly cost-effective alternative to full DPF replacement, typically saving customers 70-90% of the cost, provided the DPF substrate remains intact and undamaged. We also provide mobile cleaning and forced regeneration services where appropriate. It is important to note that DPF removal is illegal in the UK and will result in an MOT failure. We are committed to maintaining vehicle emissions compliance.

For a precise quote on our DPF cleaning service and to discuss our warranty terms, please contact us directly. We ensure all work is carried out to the highest technical standards.

Specifications

Vehicle fitment

• Citroen C4 1.6 HDi

Common faults & troubleshooting

• Loss of engine power or vehicle entering ‘limp mode’: This indicates a heavily blocked DPF restricting exhaust gas flow, requiring immediate attention.
• Illumination of the DPF warning light on the dashboard: The DPF system requires regeneration, or the filter is becoming blocked and needs servicing.
• Noticeable increase in fuel consumption: The engine is working harder to push exhaust gases through a restricted DPF, leading to reduced efficiency.
• Strong exhaust smell or visible black smoke from the exhaust: This suggests the DPF is either damaged, completely blocked, or failing to trap particulate matter effectively.
• Engine oil level rising on the dipstick: This can be caused by unburnt fuel entering the sump during multiple failed DPF regeneration attempts.
• Failure of the vehicle’s MOT emissions test: The DPF is not functioning correctly, allowing excessive particulate matter to be released into the atmosphere.

Fitting notes for this unit

• Always replace all DPF-related gaskets and exhaust clamps with new items during reinstallation to ensure a gas-tight, leak-free exhaust system.
• For models equipped with an Eolys fluid system, verify the additive reservoir level and top up if necessary, as low fluid will inhibit DPF regeneration.
• After fitting the cleaned DPF, use appropriate diagnostic equipment to clear all stored DPF-related fault codes from the Engine Control Unit (ECU).
• It is advisable to perform a static or forced regeneration cycle using diagnostic tools immediately after installation to properly initiate the DPF system.
• Carefully inspect the differential pressure sensor pipes for any signs of blockages, cracks, or damage, as their integrity is vital for accurate DPF monitoring.
• Ensure that the correct low-SAPS (Sulphated Ash, Phosphorus, Sulphur) engine oil specification (typically C2 or C3) is used to prevent premature DPF clogging.

Alternative part numbers

This turbo is also referenced by:

• 9686247880 — Peugeot DPF OEM 9686247880 (Peugeot 308 1.6 HDi, 9HX/9HZ, Euro 5)

Frequently asked questions