The Peugeot 4HU (P22DTE) is a 2,179 cc, inline‑four turbocharged diesel engine produced between 2015 and 2021. It features a dual overhead camshaft (DOHC) design with 16 valves and a high — pressure common rail fuel system, delivering outputs between 133 kW (181 PS) and 150 kW (204 PS) with torque figures of 400 Nm. A variable geometry turbocharger (VGT) ensures strong low — end response and flexible power delivery.
Fitted to models such as the 508, 3008, and 5008, the 4HU (P22…
All production years (2015–2021) meet Euro 6b/c standards .
The Peugeot 4HU (P22DTE) is a 2,179 cc inline‑four turbocharged diesel engineered for premium SUVs and sedans (2015-2021). It combines high-pressure common rail injection with a variable geometry turbocharger to deliver strong, flexible torque and refined performance. Designed to meet stringent Euro 6 standards, it relies on AdBlue injection for NOx reduction.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,179 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 85.0 mm × 96.0 mm | |
Power output | 133–150 kW (181–204 PS) | |
Torque | 400 Nm @ 1,500–2,750 rpm | |
Fuel system | High-pressure common rail (Bosch CP4.2, up to 2,000 bar) | |
Emissions standard | Euro 6b/c | |
Compression ratio | 15.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Honeywell) | |
Timing system | Chain‑driven | |
Oil type | Peugeot 9736.B2 (SAE 5W‑30) | |
Dry weight | 165 kg |
The Peugeot 4HU (P22DTE) was used across Peugeot's EMP2 platform with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts in the 508 and revised exhaust routing for the 3008-and from 2018 the facelifted models received updated ECU software for improved AdBlue system management, creating minor calibration differences. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from Peugeot technical bulletins (2016-2021) and owner-reported failure data (2018-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The 4HU (P22DTE) is generally a robust and powerful engine, but its complexity lies in the emissions system. With regular long-distance driving to ensure proper DPF and AdBlue system function, and strict adherence to oil changes using 5W-30, these engines can be very reliable. Neglecting the AdBlue system or using short trips exclusively is the primary cause of major issues.
The most frequent issues are AdBlue injector crystallisation or failure, NOx sensor faults leading to emissions warnings, EGR valve clogging causing performance issues, and oil leaks from the turbocharger oil lines. These are well-documented in Peugeot service information and are often related to usage patterns or fluid quality.
This 2.2L diesel engine was used in Peugeot's higher-spec models from the mid-2010s, including the 508 (2015-2021), 3008 (2016-2021), and 5008 (2017-2021), typically in GT or GT Line trims. It was not used in smaller models like the 208 or 308.
Aftermarket ECU tuning is common on the 4HU-P22DTE platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Expect combined fuel economy of approximately 5.5-6.5 L/100km (51-43 mpg UK) in a Peugeot 508 GT or 3008 GT. Real-world figures are highly dependent on driving style and journey length; short urban trips will see significantly higher consumption due to emissions system activity.
Yes. The 4HU (P22DTE) is an interference engine. If the timing chain were to fail (an extremely rare occurrence) or if the cam timing is severely disrupted, piston-to-valve contact is possible, resulting in significant internal engine damage. The chain is designed for the engine's lifetime under normal conditions.
Peugeot mandates a 5W-30 synthetic oil meeting their specific 9736.B2 standard (or equivalent ACEA C2). Using the correct low-SAPS (Sulphated Ash, Phosphorus, Sulphur) oil is critical for the longevity of the DPF and AdBlue system. Change intervals should not exceed 20,000 km or 1 year.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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