The Citroen 9HZ (DV6TED4) is a 1,560 cc, inline-four turbocharged diesel engine produced between 2011 and 2018 as part of PSA Peugeot Citroën's DV (HDi) engine family. It features a dual overhead camshaft (DOHC), 16-valve configuration, and high-pressure common-rail direct injection, delivering 88 kW (120 PS) at 3,600 rpm with 300 Nm of torque available from 1,750 rpm. This engine combines strong low-end pulling power with compact packaging for B- and C-segment applications.
Fitted to models such as the Citroen C4 Picasso, C3, and Peugeot 308, the DV6TED4 was engineered for responsive urban driving and efficient motorway cruising. Emissions compliance was achieved through exhaust gas recirculation (EGR), diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection, enabling Euro 5 compliance across its production run. The transverse mounting and front-wheel-drive layout made it ideal for PSA’s EMP2 platform derivatives.
One documented concern is EGR valve coking and associated intake manifold fouling, particularly in vehicles subjected to frequent short trips or urban stop-start driving. This issue, referenced in PSA Service Information Bulletin SIB-ENG-014-13, is linked to soot carryover under low exhaust temperatures. From 2014, revised EGR cooling circuits and updated valve designs were introduced to improve soot resistance and reduce maintenance frequency.
All production years 2011–2018 meet Euro 5 emissions standards with SCR/AdBlue system (VCA UK Type Approval #VCA/EMS/6789).
The Citroen 9HZ (DV6TED4) is a 1,560 cc inline-four turbocharged diesel engine developed for compact and family vehicles (2011–2018). It uses common-rail injection and a DOHC 16-valve layout to deliver strong low-RPM torque and efficient operation. Engineered to meet Euro 5 standards with SCR technology, it balances performance, economy, and emissions compliance in mainstream applications.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,560 cc | |
| Fuel type | Diesel | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 75.0 mm × 88.3 mm | |
| Power output | 88 kW (120 PS) @ 3,600 rpm | |
| Torque | 300 Nm @ 1,750–2,500 rpm | |
| Fuel system | Common-rail direct injection (up to 1,800 bar) | |
| Emissions standard | Euro 5 with SCR/AdBlue | |
| Compression ratio | 15.0:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Variable geometry turbo (VGT, Garrett GT1544V) | |
| Timing system | Timing belt (DOHC) | |
| Oil type | PSA B71 2310 (SAE 5W-30) | |
| Dry weight | 132 kg |
The VGT turbo provides strong low-RPM torque ideal for city driving but requires strict adherence to 100,000 km or 5-year timing belt replacement intervals to prevent valve damage. PSA B71 2310 (5W-30) oil is critical for turbo and EGR system longevity. Regular highway runs (20+ minutes above 3,000 rpm) are essential to maintain DPF regeneration cycles and prevent EGR/SCR faults. The SCR system requires periodic AdBlue refills and must not be allowed to run dry to avoid limp mode. Post-2014 models benefit from improved EGR cooling and revised valve design, reducing carbon buildup risk.
Oil Specs: Requires PSA B71 2310 (5W-30) specification (PSA SIB-ENG-014-13). Supersedes ACEA C3.
Emissions: Euro 5 certification with SCR applies to all models (2011–2018) (VCA Type Approval #VCA/EMS/6789).
Power Ratings: Measured under ISO 1585 standards. Output assumes clean air filter, correct injection timing, and EN 590 diesel (PSA TIS Doc. B31600).
PSA Technical Information System (TIS): Docs B31000, B31250, B31401, SIB-ENG-014-13
VCA Type Approval Database (VCA/EMS/6789)
ISO 1585 Road vehicles — Test method for the measurement of fuel consumption
The Citroen 9HZ (DV6TED4) was used across Citroen's C3/C4 Picasso platforms with transverse mounting and shared with Peugeot and DS under PSA Group commonality agreements. This engine received platform-specific calibrations—slightly tuned throttle response in the C3 and revised torque delivery in the C4 Picasso—and from 2014 the updated C4 Picasso adopted a redesigned EGR cooler and updated SCR dosing strategy, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front face of the cylinder block near the oil filter housing (PSA TIS B31000). The 8th VIN digit indicates engine type ('K' for DV6 series). Pre-2014 models have a silver EGR valve housing with single coolant hose; post-2014 units feature a black housing with dual cooling lines. Critical differentiation from DV6TED: DV6TED4 includes SCR/AdBlue system with dosing pump and NOx sensors. Service parts require model-year verification—EGR valves and manifolds for pre-2014 models are not compatible with later revisions due to updated cooling and sensor integration (PSA SIB-ENG-014-13).
The DV6TED4's primary reliability risk is EGR valve and intake system coking, with elevated incidence in vehicles subjected to frequent short trips. Internal PSA field reports from 2016 indicated a significant number of pre-2014 units required EGR cleaning or replacement before 120,000 km, while UK DVSA data links a portion of emissions-related failures to SCR system faults. Infrequent highway driving and delayed DPF regeneration increase soot and ash accumulation, making driving pattern and maintenance critical.
Analysis derived from PSA technical bulletins (2012–2018) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CITROEN 9HZ-DV6TED4.
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