The Citroën 9HU, known internally as DV6UTED4, is a 1,560 cc, inline-four turbocharged diesel engine produced between 2016 and 2020. It features a DOHC 16-valve configuration, high-pressure common-rail direct injection (up to 1,800 bar), and a variable geometry turbocharger (VGT) with integrated exhaust gas recirculation (iEGR). In standard tune, it delivers 96 kW (130 PS) at 3,750 rpm and 300 Nm of torque at 1,750 rpm, primarily used in compact and mid-size passenger vehicles.
Fitted to models such as the Citroën C4 Cactus, C3, and Peugeot 2008, the DV6UTED4 was engineered for responsive low-end torque and improved emissions compliance. Emissions compliance was achieved through iEGR, a diesel particulate filter (DPF), selective catalytic reduction (SCR) with AdBlue injection, and closed-loop lambda control, allowing Euro 6b compliance across its production run. The engine’s broad torque curve and refined operation made it ideal for urban and mixed driving conditions.
One documented concern is premature high-pressure fuel pump (HPFP) failure, particularly in vehicles with frequent short trips. This issue, highlighted in PSA Service Bulletin 15/1021, is attributed to inadequate lubrication and thermal stress under cold-engine operation. From 2018 onward, revised pump internals and updated ECU mapping were introduced to improve durability.
All production years (2016–2020) meet Euro 6b standards depending on market (VCA UK Type Approval #VCA/EMS/8890).
The Citroën 9HU (DV6UTED4) is a 1,560 cc inline-four turbocharged diesel engine designed for compact and mid-size platforms (2016–2020). It combines common-rail direct injection with a variable geometry turbocharger and integrated EGR to deliver strong low-RPM torque and improved emissions performance. Designed to meet Euro 6b standards, it balances economy with regulatory compliance in modern applications.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,560 cc | |
| Fuel type | Diesel (ULSD, EN 590 compliant) | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged (variable geometry with iEGR) | |
| Bore × stroke | 75.0 mm × 88.3 mm | |
| Power output | 96 kW (130 PS) @ 3,750 rpm | |
| Torque | 300 Nm @ 1,750 rpm | |
| Fuel system | Delphi HP5 common-rail (up to 1,800 bar) | |
| Emissions standard | Euro 6b | |
| Compression ratio | 15.8:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Honeywell variable geometry turbo with integrated EGR (iEGR) | |
| Timing system | Timing belt (renew every 190,000 km or 10 years) | |
| Oil type | Total Rubia TIR 5W-30 | |
| Dry weight | 149 kg |
The iEGR-VGT system provides strong low-RPM torque ideal for urban driving but requires adherence to 190,000 km or 10-year timing belt replacement intervals to prevent valve damage. Total Rubia TIR 5W-30 oil is critical due to its low-SAPS formulation protecting the DPF, SCR system, and turbo. Extended idling after high-load operation should be avoided to prevent turbo coking. The Delphi HP5 fuel system demands ultra-low-sulfur diesel (EN 590) to avoid high-pressure pump seizure. Post-2018 models feature revised HPFP internals; pre-2018 units should be monitored per PSA SIB 15/1021. The ECU includes adaptive DPF and SCR regeneration strategies to accommodate regional driving patterns.
Oil Specs: Requires Total Rubia TIR 5W-30 specification (PSA SIB 15/1021). Meets PSA B71 2290 standard.
Emissions: Euro 6b certification applies to all 2016–2020 models (VCA Type Approval #VCA/EMS/8890). Requires AdBlue top-up every 12,000–15,000 km.
Power Ratings: Measured under ECE R85 standards. 96 kW output requires EN 590 diesel for optimal performance (PSA TIS Doc. B15950).
PSA Technical Information System (TIS): Docs B15950, B15975, SIB 15/1021
VCA Type Approval Database (VCA/EMS/8890)
European Regulation (EC) No 715/2007
The Citroën 9HU (DV6UTED4) was used across Citroën's B- and C-segment platforms with transverse mounting and shared with Peugeot and Opel under PSA group harmonization. This engine received platform-specific calibrations-adaptive throttle mapping in the C4 Cactus and revised EGR routing in the C3-and from 2018, updated ECU strategies introduced enhanced fuel pump protection, 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 transmission bellhousing (PSA TIS B15960). The 8th VIN digit indicates engine type ('9' for DV6 series). Pre-2018 models have black cam covers with exposed turbo actuator; post-2018 units feature revised heat shielding. Critical differentiation from DV6TED4: DV6UTED4 has iEGR-integrated turbo and SCR/AdBlue system, while DV6TED4 is Euro 5 without SCR. Service parts require model-year verification - HPFP units for pre-2018 models are not compatible with later revisions due to ECU calibration differences (PSA SIB 15/1021).
The DV6UTED4's primary reliability risk is high-pressure fuel pump (HPFP) failure on early builds, with elevated incidence in urban driving with frequent short trips. PSA internal field reports from 2017 indicated a significant share of pre-2018 units required HPFP replacement before 100,000 km, while UK DVSA MOT records show increased emissions failures linked to fuel system faults in stop-start conditions. Extended idling and poor fuel quality exacerbate wear, making fuel system and lubrication maintenance critical.
Analysis derived from PSA technical bulletins (2015-2020) and UK DVSA failure statistics (2017-2022). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about CITROEN 9HU-DV6UTED4.
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