The Citroën 5GC (engine code EP6DT) is a 1,598 cc, inline — four turbocharged diesel engine developed by PSA Group, produced between 2010 and 2018. It features high — pressure common — rail direct injection, variable geometry turbocharging (VGT), and dual overhead camshafts (DOHC), delivering 81 kW (110 PS) and 270 Nm of torque. This configuration provides responsive low — end pull ideal for urban and family driving applications.
Fitted to models such as the Citroën C4 Pic…
Production years 2010–2015 meet Euro 5 standards; 2016–2018 models comply with Euro 6b depending on market (VCA UK Type Approval #VCA/EMS/5680).
The Citroën 5GC (EP6DT) is a 1,598 cc inline-four turbo-diesel engine engineered for compact and family vehicles (2010–2018). It combines common-rail injection with a variable geometry turbocharger to deliver strong low-RPM torque and improved fuel economy. Designed to meet Euro 5 and Euro 6b standards, it balances efficiency with regulated emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,598 cc | |
Fuel type | Diesel | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged (variable geometry turbo) | |
Bore × stroke | 77.0 mm × 85.8 mm | |
Power output | 81 kW (110 PS) @ 4,000 rpm | |
Torque | 270 Nm @ 1,750–2,500 rpm | |
Fuel system | Bosch CRS 2-16 common-rail (up to 1,600 bar) | |
Emissions standard | Euro 5 (2010–2015); Euro 6b (2016–2018) | |
Compression ratio | 15.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Honeywell variable geometry turbo (VGT) with electronic actuator | |
Timing system | Timing belt (interference design) | |
Oil type | PSA B71 2310 (SAE 5W-30) | |
Dry weight | 133 kg |
The Citroën 5GC (EP6DT) was used across Citroën's PF2/PF3 platforms with transverse mounting and shared with DS Automobiles for premium applications. This engine received platform-specific calibrations—higher EGR flow in the C3 and SCR integration in the DS4—and from 2016 the facelifted C4 Picasso adopted the Euro 6b-compliant EP6DT variant with revised NOx sensors, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The EP6DT's primary reliability risk is EGR valve coking, with elevated incidence in vehicles used for short urban journeys. Internal PSA field reports from 2014 indicated a significant number of pre-2015 units required EGR cleaning or replacement before 90,000 km, while UK DVSA data links a notable share of emissions-related MOT failures to DPF saturation in high-mileage examples. Short-trip cycles and poor fuel quality increase particulate and thermal stress, making maintenance interval adherence and fuel specification critical.
Analysis derived from PSA technical bulletins (2012–2017) and UK DVSA failure statistics (2016–2023). 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 EP6DT offers strong fuel economy and refinement but is sensitive to driving patterns and maintenance. Pre-2015 models are prone to EGR coking if used for frequent short trips. Later revisions (post-2015) improved EGR cooler design and SCR integration. Well-maintained examples with regular oil changes, quality fuel, and timely DPF regeneration can exceed 180,000 km.
Key issues include EGR valve coking, DPF regeneration failure, high-pressure fuel pump wear, and timing belt neglect. These are documented in PSA service bulletins. AdBlue system faults and NOx sensor degradation are also reported in high-mileage units. Cold-start hesitation may indicate injector wear.
The EP6DT was used in the Citroën C4 Picasso (B7) BlueHDi 110 (2010–2018), C3 1.6 HDi 110 (2010–2017), and DS4 1.6 BlueHDi (2011–2015). It was also shared with Peugeot 308 BlueHDi 110 models. All units from 2010–2015 met Euro 5; 2016–2018 models comply with Euro 6b.
Yes. The EP6DT responds well to ECU remapping, with stage 1 tunes typically adding +20–25 kW. The turbo and fuel system support moderate increases, but supporting mods (intercooler, exhaust) are recommended. Tuning should preserve DPF and EGR functionality to avoid emissions-related faults.
In a C4 Picasso BlueHDi 110, combined consumption is ~4.3 L/100km (65 mpg UK). Real-world figures vary: city driving may see 5.2–5.7 L/100km, while highway runs can achieve 4.0 L/100km (70 mpg UK). Driving style and DPF regeneration frequency significantly influence economy.
Yes. The EP6DT uses an interference timing belt design. If the belt skips or breaks, pistons can contact open valves, resulting in severe internal engine damage. Replacement every 5 years or 120,000 km is critical to prevent catastrophic failure.
PSA specifies 5W-30 oil meeting PSA B71 2310 standard. This synthetic oil is formulated for turbocharged diesel engines with DPF and SCR systems. Change every 15,000 km or annually to ensure optimal component life and soot management.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with CITROEN or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
CITROEN Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialCITROEN documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed”.
All external links open in new tabs. Please verify current availability of resources.