The Citroën 9HD (engine code DV6C) is a 1,560 cc, inline-four turbo-diesel engine produced between 2004 and 2018. Developed by PSA Group, it features a cast-iron block, aluminium head, and common-rail direct injection, delivering 80 kW (109 PS) at 4,000 rpm and 240 Nm of torque at 1,750 rpm. It uses a variable geometry turbocharger (VGT), DOHC valvetrain, and exhaust gas recirculation (EGR) to balance performance and emissions compliance.
Fitted to models such as the Citroën C4, C5, and Berlingo, the DV6C was engineered for refined mid-range power delivery and strong fuel economy in compact and mid-size platforms. Emissions compliance was achieved through a diesel particulate filter (DPF) and closed-loop lambda control, enabling Euro 4 compliance across its initial production run, with later models meeting Euro 5 standards via updated ECU mapping and EGR calibration.
One documented concern is EGR valve coking and associated intake manifold fouling, particularly in vehicles used for frequent short trips. This issue, referenced in PSA Service Bulletin SIB-ENG-2010-07, stems from incomplete regeneration cycles and low operating temperatures. From 2010, PSA introduced revised EGR valve materials and updated DPF regeneration logic to reduce carbon accumulation and improve system longevity.
Production years 2004–2009 meet Euro 4 standards; 2010–2018 models comply with Euro 5 depending on market (VCA UK Type Approval #VCA/EMS/9321).
The Citroën DV6C is a 1,560 cc inline-four turbo-diesel engine engineered for compact and mid-size hatchbacks and MPVs (2004–2018). It combines common-rail injection with a variable geometry turbocharger to deliver strong low-end torque and efficient cruising. Designed to meet Euro 4 and Euro 5 standards, it balances economy with drivability in urban and regional applications.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,560 cc | |
| Fuel type | Diesel | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged (VGT) | |
| Bore × stroke | 75.0 mm × 88.3 mm | |
| Power output | 80 kW (109 PS) @ 4,000 rpm | |
| Torque | 240 Nm @ 1,750 rpm | |
| Fuel system | Common-rail direct injection (Delphi HDP5, up to 1,600 bar) | |
| Emissions standard | Euro 4 (2004–2009); Euro 5 (2010–2018) | |
| Compression ratio | 16.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Variable geometry turbo (IHI RHF4) | |
| Timing system | Timing belt (DOHC, front-mounted) | |
| Oil type | Total Rubia TIR 5W-30 (PSA B71 2310) | |
| Dry weight | 142 kg |
The VGT turbo provides strong low-RPM torque ideal for city driving but requires adherence to 120,000 km or 6-year timing belt replacement intervals to prevent valve damage. Total Rubia TIR 5W-30 oil meeting PSA B71 2310 specification is essential for maintaining EGR and DPF system health. The Delphi HDP5 high-pressure fuel pump demands ultra-low-sulfur diesel (ULSD) meeting EN 590 standards to prevent premature wear. Urban driving with frequent short trips inhibits DPF regeneration and accelerates EGR coking; highway runs every few hundred kilometres are recommended. Post-2010 models feature improved EGR valve design; pre-2010 units benefit from proactive cleaning or upgrade per PSA SIB-ENG-2010-07.
Oil Specs: Requires PSA B71 2310 specification (PSA SIB-ENG-2010-07). Compatible with ACEA C3 but not a substitute.
Emissions: Euro 4 applies to 2004–2009 models (VCA Type Approval #VCA/EMS/9321). Euro 5 compliance from 2010 onward varies by market.
Power Ratings: Measured under ECE R85 standards. Output consistent across fuel grades meeting EN 590 diesel specification.
PSA Technical Information System (TIS): Docs P16000, P16100, SIB-ENG-2010-07
VCA Type Approval Database (VCA/EMS/9321)
ISO 1585:1992 Road vehicles — Test code for net power
The Citroën 9HD (DV6C) was used across Citroën's C/B platforms with transverse mounting and shared with Peugeot under PSA Group standardization. This engine received platform-specific calibrations—tuned idle control in the C5 and revised intake tuning in the DS4—and from 2010, Euro 5-compliant variants featured updated ECU mapping and DPF regeneration logic, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front-facing side of the cylinder block near the exhaust manifold (PSA TIS P16000). The 8th VIN digit indicates engine type ('K' for DV6C). Pre-2010 models have a silver valve cover with black plastic timing cover; post-2010 units use a black valve cover. Critical differentiation from DV6TED4: DV6C has 160 Nm torque limiter in ECU, while DV6TED4 (112 PS) uses higher-boost turbo. Service parts require model-year verification—EGR valves and ECUs for pre-2010 engines are not interchangeable with post-revision units due to calibration changes (PSA SIB-ENG-2010-07).
The DV6C's primary reliability risk is EGR valve coking, with elevated incidence in urban-driven vehicles. PSA internal field reports from 2011 indicated a significant share of pre-2010 units required EGR service before 120,000 km, while UK DVSA data shows increased DPF-related MOT failures in stop-start traffic. Extended oil intervals and low-temperature operation exacerbate carbon buildup, making proactive maintenance critical.
Analysis derived from PSA technical bulletins (2008–2015) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CITROEN 9HD-DV6C.
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