🏷️ Basic Information Identification Make: Citroën Model: C4 Year: 2005 Engine Code: 9HZ Engine Variant: 1.6 16V HDi Codes Engine Family: DV6 👋 Introduction Market Position Vehicle Segment: Compact family car Competitive Analysis Competitors: Volkswagen Golf, Ford Focus, Opel Astra, Peugeot 307 Key Features Design Philosophy: Emphasis on comfort, distinctive styling, and innovative features Engine Technology: Common rail direct injection diesel for efficiency and torque 📋 Manual Details Coverage Areas Primary Focus: Service and Repair Scope: Complete vehicle coverage for specific engine and year Page Count Estimated Pages: Variable (typical factory manual, often 1000+ pages) Manual Type Type: Factory Service Manual / Workshop Manual Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Engine Management: Detailed diagnosis and repair of the 1.6 16V HDi engine Fuel System: Injection system, fuel pump, injectors, common rail, throttle body Cooling System: Radiator, thermostat, water pump, coolant flow, fan operation Lubrication System: Oil pump, oil filter, oil passages, lubrication schedules Chassis: Suspension, steering, brakes, wheels, tires Electrical System: Battery, alternator, starter, lighting, comfort systems, ECUs Emission Control: Catalytic converter, DPF (Diesel Particulate Filter) system, EGR (Exhaust Gas Recirculation) system Wiring Diagrams: Comprehensive electrical schematics for all vehicle systems Procedures Included Maintenance: Routine service, oil changes, filter replacements, inspections Repair: Step-by-step instructions for component removal, overhaul, and installation Troubleshooting: Diagnostic procedures for common faults and symptoms Diagnostics: Guidance on using diagnostic tools and interpreting fault codes Disassembly Reassembly: Complete disassembly and reassembly of major components and systems Technical Depth Level Of Detail: Factory-level technical information, suitable for professional mechanics and experienced DIYers Illustrations: High-quality diagrams, exploded views, and illustrations Torque Specifications: Precise torque values for all critical fasteners 📊 Manual Specifications File Format Compatibility: Adobe PDF Reader Print Quality Printability: Printable without restriction Binding Type Binding: Digital Download (N/A for physical binding) Paper Type Paper: Digital (N/A for physical paper type) ⚙️ Engine Specifications Primary Engine Engine Name: DV6 HDi Engine Displacement: 1.6 liters (1560 cc) Engine Configuration: Inline 4-cylinder, turbocharged, intercooled Valvetrain: DOHC, 16 valves Performance Horsepower: Approximately 90-110 PS (depending on specific tune) Torque: Approximately 215-240 Nm (depending on specific tune) Fuel System Fuel Type: Diesel Injection Type: Common Rail Direct Injection (CRDi) Emission Control Emission Standard: Euro 4 compliant (typically) 🔧 Transmission Standard Type: Manual transmission (e.g., 5-speed or 6-speed) Optional Type: Automated manual transmission (e.g., EGS - Electronic Gearbox System) might be available on some variants Features Clutch Type: Dry single-plate clutch 📐 Dimensions Exterior Body Styles: Hatchback (3-door and 5-door) Length: Approx. 4,260 mm (5-door hatchback) Width: Approx. 1,760 mm Height: Approx. 1,460 mm Weights Curb Weight: Approx. 1250-1350 kg (depending on equipment) 🛡️ Safety Features Ratings Euro Ncap Rating: 5 stars (for the C4 range) Active Features ABS: Anti-lock Braking System (ABS) Esp: Electronic Stability Program (ESP) - often optional or standard on higher trims Brake Assist: Emergency Brake Assist (EBA) Passive Features Airbags: Multiple airbags (front, side, curtain) Seatbelts: Pre-tensioning seatbelts 💡 Technology Features Infotainment Audio System: Factory radio/CD player, often with steering wheel controls Driver Assistance Cruise Control: Available on many trims Parking Sensors: Rear parking sensors often available Connectivity Auxiliary Input: May be present for external audio devices 🔧 Maintenance Service Intervals Oil Change Interval: Typically 15,000 miles or 1 year, whichever comes first (check specific manual for exact recommendations) Air Filter Replacement: Recommended every 2-3 years or as per mileage (e.g., 30,000 miles) Fuel Filter Replacement: Diesel fuel filter typically requires replacement every 40,000-60,000 miles Timing Belt Replacement: Critical component, typically 120,000 miles or 10 years, includes tensioners and idlers. The 1.6 HDi (DV6) uses a timing belt. Fluid Specifications Engine Oil Specification: ACEA A3/B4 or C2, API CF, SAE 0W-30 or 5W-30 (e.g., Total Quartz INEO ECS 5W-30 is often recommended) Coolant Specification: Citroën/Peugeot coolant (often blue or green), ethylene glycol based, long-life (e.g., PSA S71-2710) Brake Fluid Specification: DOT 4 Known Issues Dpf Problems: Diesel Particulate Filter (DPF) regeneration issues, clogging, especially with short urban trips Egr Valve Issues: Exhaust Gas Recirculation (EGR) valve sticking or malfunctioning Oil Cooler Leaks: Potential for oil leaks from the oil cooler or its seals Turbocharger Issues: Wear and tear on the turbocharger, potential for failure if not maintained 📚 Vehicle History Brand Heritage Manufacturer: Citroën Model Evolution Generation: First Generation (2004-2010) Production Manufacturing Plants: PSA's Mulhouse factory (France), also other international plants