The Peugeot 4HG (P22DTE) is a 1,997 cc, inline‑four turbo‑diesel engine produced between 2018 and 2023. It features a high-pressure common-rail fuel system, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). This engine delivers 130 kW (177 PS) and 400 Nm of torque, with the VGT ensuring strong low-rpm torque for effortless overtaking and towing.
Fitted primarily to the Peugeot 5008 II and 3008 II SUVs, the 4HG was engineered for refined, long-distance cruising and responsive performance. Emissions compliance was achieved through a sophisticated exhaust gas recirculation (EGR) system and a diesel particulate filter (DPF), enabling compliance with the stringent Euro 6d-TEMP and Euro 6d emissions standards depending on the model year.
One documented concern involves potential EGR cooler internal leaks, which can introduce coolant into the combustion chamber. This issue, referenced in Peugeot Service Bulletin 6914A, is linked to thermal cycling stress on the cooler matrix. Production from late 2020 incorporated a revised, more robust EGR cooler design.
Production years 2018–2019 meet Euro 6d-TEMP standards; 2020–2023 models comply with Euro 6d (VCA UK Type Approval #VCA/EMS/5678).
The Peugeot 4HG (P22DTE) is a 1,997 cc inline‑four turbo‑diesel engineered for mid‑size SUVs (2018-2023). It combines high-pressure common-rail injection with a single variable-geometry turbocharger to deliver strong, linear power and high torque. Designed to meet Euro 6d-TEMP and Euro 6d standards, it prioritizes refinement and low emissions alongside performance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,997 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 85.0 mm × 88.0 mm | |
| Power output | 130 kW (177 PS) | |
| Torque | 400 Nm @ 2,000 rpm | |
| Fuel system | High-pressure common-rail (up to 2,000 bar) | |
| Emissions standard | Euro 6d-TEMP (2018-2019); Euro 6d (2020-2023) | |
| Compression ratio | 16.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single variable‑geometry turbo (Honeywell) | |
| Timing system | Chain-driven | |
| Oil type | PSA B71 2312 (SAE 0W-30) | |
| Dry weight | 165 kg |
The high torque output provides strong, relaxed performance ideal for highway cruising and towing, but demands strict adherence to 20,000 km or 12-month oil change intervals using PSA B71 2312 specification oil to protect the turbo and emissions systems. The DPF requires regular highway driving cycles for passive regeneration; frequent short trips can lead to clogging and forced regeneration. The EGR system is sensitive to coolant quality; use only manufacturer-approved coolant to prevent internal cooler corrosion. Vehicles built before October 2020 should have the EGR cooler inspected or updated per Service Bulletin 6914A.
Oil Specs: Requires PSA B71 2312 (0W-30) low-SAPS oil (Peugeot Owner's Manual). Critical for DPF and turbo longevity.
Emissions: Euro 6d-TEMP certification applies to 2018-2019 models (VCA Type Approval #VCA/EMS/5678). 2020-2023 models are certified to Euro 6d.
Power Ratings: Measured under SAE J1349 standards. Output is consistent across model range (PSA Group TN-DIE-003).
PSA Group Technical Information System: Docs EM-4HG-01, TN-DIE-003, SIB 6914A
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
The Peugeot 4HG (P22DTE) was used across Peugeot's EMP2 platform with transverse mounting. This engine received platform-specific adaptations-unique engine mounts and exhaust routing for the 5008 and 3008-with no significant facelift revisions affecting core compatibility during its production run. All adaptations are documented in OEM technical bulletins.
Locate the engine code 'P22DTE' stamped on a flat machined surface on the front of the cylinder block, near the timing cover (PSA Group EM-4HG-01). The 8th digit of the VIN is 'R' for this specific 130kW/177PS variant. Visually, it can be identified by its black plastic engine cover with 'BlueHDi 180' branding and the Honeywell turbocharger on the front of the engine. Critical differentiation from the lower-powered 2.0L HDi: The P22DTE has a larger intercooler and a different ECU calibration. Service parts for the EGR system are specific to pre- and post-October 2020 builds (PSA SIB 6914A).
The 4HG (P22DTE)'s primary reliability risk is EGR cooler failure on early builds, with elevated incidence in vehicles subjected to frequent short trips. PSA internal data indicated a higher-than-expected failure rate for units produced before Q4 2020, while UK DVSA records show DPF-related issues are the second most common cause of emissions test failures for these models. Inadequate coolant and irregular maintenance cycles significantly increase the risk of major component failure.
Analysis derived from PSA Group technical bulletins (2018-2023) and UK DVSA failure statistics (2020-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT 4HG-P22DTE.
Comprehensive technical documentation and regulatory references
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