The Peugeot EP6CDTX is a 1,598 cc, inline‑four turbocharged petrol engine produced between 2014 and 2021. It features an all-aluminium block and head, DOHC valvetrain with variable valve timing (VVT), and direct fuel injection, delivering a blend of performance and efficiency. Peak power output is 151 kW (205 PS), with torque peaking at 300 Nm, enabled by its twin-scroll turbocharger for strong mid-range response.
Fitted to performance-oriented models like the 308 GTi and RCZ R, the EP6CDTX was engineered for spirited driving and rapid acceleration. Drivers experience sharp throttle response and a broad torque curve. Emissions compliance for its production era was met through the use of a gasoline particulate filter (GPF) and sophisticated engine management, achieving Euro 6 standards.
One documented concern is carbon buildup on intake valves, a known characteristic of direct-injection engines without port injection. This issue, referenced in PSA Group Technical Note TN‑14‑07, can lead to rough idle and reduced performance if not addressed. Minor updates to the engine management software were implemented during its production run to optimize efficiency.
Production years 2014–2021 meet Euro 6 emissions standards applicable at time of manufacture (VCA UK Type Approval #VCA/EMS/9876).
The Peugeot EP6CDTX is a 1,598 cc inline‑four turbocharged petrol engineered for hot hatches and coupes (2014-2021). It combines direct fuel injection with a twin-scroll turbocharger to deliver high specific output and responsive performance. Designed to meet stringent Euro 6 emissions standards, it incorporates a gasoline particulate filter for compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,598 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 77.0 mm × 85.8 mm | |
| Power output | 151 kW (205 PS) | |
| Torque | 300 Nm @ 1,900 rpm | |
| Fuel system | High-pressure direct injection (Bosch HDEV5) | |
| Emissions standard | Euro 6 | |
| Compression ratio | 9.2:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Twin-scroll (Honeywell) | |
| Timing system | Chain-driven | |
| Oil type | Synthetic 5W‑30 (PSA B71 2290 specification) | |
| Dry weight | 125 kg |
The twin-scroll turbo provides strong, lag-free torque ideal for overtaking but requires premium 98 RON fuel for optimal performance and to prevent knock. PSA B71 2290 specification oil is critical to protect the turbo bearings and timing chain. Extended oil change intervals beyond 20,000 km risk accelerated carbon buildup on intake valves, necessitating walnut-blasting per PSA TN-14-07. The GPF requires periodic high-speed runs to regenerate; frequent short trips can trigger warning lights. Engine mounts on performance models are wear items and should be inspected regularly.
Oil Specs: Requires Synthetic 5W-30 meeting PSA B71 2290 specification (PSA Owner's Manual Suppl. 2015). ACEA C2 is the underlying standard.
Emissions: Euro 6 certification applies to all 2014–2021 models (VCA Type Approval #VCA/EMS/9876). Includes GPF for particulate matter control.
Power Ratings: Measured under DIN 70020 standards. Output figures are net ratings as installed in vehicle (PSA TIS Doc. MEC-EP6-05).
PSA Technical Information System (TIS): Docs MEC-EP6-05, ELEC-EP6-08
VCA Type Approval Database (VCA/EMS/9876)
ACEA European Oil Sequences Archive
The Peugeot EP6CDTX was used across PSA's EMP2 platform with transverse mounting. This engine received minimal platform-specific adaptations-consistent ancillary placement across the 308 and RCZ-and no significant facelift revisions occurred during its production, ensuring broad parts interchangeability. All applications are documented in PSA technical bulletins.
Locate the engine code stamped on a flat boss on the cylinder block, near the gearbox flange (PSA TIS MEC-EP6-05). The code 'EP6CDTX' identifies this specific 1.6L turbo variant. Visually, it is distinguished by its red valve cover on the GTi/RCZ R, the twin-scroll turbocharger housing, and the presence of a gasoline particulate filter (GPF) in the exhaust system. Critical differentiation from the lower-powered EP6CDT: EP6CDTX has a larger intercooler and revised ECU mapping. Service parts like turbos and injectors are generally interchangeable within the EP6 family, but calibration codes must match the specific variant.
The EP6CDTX's primary reliability risk is carbon buildup on intake valves, with elevated incidence in vehicles subjected to frequent short trips. PSA technical notes indicate a correlation between low annual mileage and required induction cleaning frequency, while owner reports frequently cite turbocharger actuator failures. Use of lower-grade fuel and infrequent high-RPM operation make preventative maintenance critical.
Analysis derived from PSA technical bulletins (2014-2021) and aggregated UK DVSA failure statistics (2018-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about PEUGEOT EP6CDTX.
Comprehensive technical documentation and regulatory references
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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