Engine Mechanical:
Complete engine assembly, cylinder head, pistons, connecting rods, crankshaft, timing system (belt/chain, tensioners, pulleys), lubrication system (oil pump, oil filter housing, oil cooler), cooling system (radiator, water pump, thermostat, fan), exhaust system (catalytic converter, DPF if applicable).
Engine Management:
Fuel injection system (common rail, injectors, high-pressure pump, fuel filter), ignition system (glow plugs), engine control unit (ECU) diagnosis and parameters, sensor readings (MAP, MAF, coolant temp, crank/cam position), emission control systems (EGR valve, DPF regeneration if applicable).
Transmission:
Manual gearbox (clutch system, gearbox internals, shift mechanism), automatic gearbox (if applicable, though this specific model is HDi often paired with manual or specific auto variants), drivetrain (driveshafts, CV joints, differential).
Brakes:
Front and rear disc brakes (pads, rotors, calipers), brake hydraulics (master cylinder, brake lines, ABS unit), parking brake system, brake fluid specifications and bleeding procedures.
Suspension Steering:
Front suspension (MacPherson struts, control arms, anti-roll bar), rear suspension (torsion beam or multi-link depending on C4 variant), steering system (power steering pump, rack and pinion, steering column), wheel alignment specifications.
Electrical Electronics:
Battery, alternator, starter motor, lighting system (headlights, taillights, interior lights), fuse box and relay locations, wiring diagrams for key systems, body control module (BCM) functions, power windows, central locking, wipers, horn.
Body Chassis:
Body panel removal and installation (doors, hood, trunk, bumpers), interior trim components, chassis and frame structure, rust prevention and repair considerations.
HVAC:
Air conditioning system (compressor, refrigerant, evaporator, condenser), heating system (heater core, blower motor), climate control module, cabin air filter replacement.
Safety Systems:
Airbag system (SRS module, sensors, airbags), seatbelt pre-tensioners, ABS, ESP (Electronic Stability Program) components and calibration.
Infotainment Connectivity:
Basic radio, speaker systems, antenna connections, and steering wheel remote functions.
Maintenance:
Scheduled maintenance checks, oil and filter changes, air filter replacement, fuel filter replacement, spark plug replacement (if applicable to specific petrol variant but not HDi), coolant flush and replacement, brake fluid change, timing belt/chain inspection and replacement intervals.
Troubleshooting:
Diagnostic procedures for common drivability issues, electrical faults, braking system problems, HVAC malfunctions, starting difficulties. Fault code interpretation and guided diagnostic flows.
Repair Rebuild:
Detailed step-by-step instructions for component removal, disassembly, inspection, repair, reassembly, and installation for all major vehicle systems. Includes engine rebuild procedures, gearbox overhauls, brake caliper refurbishment, suspension component replacement.
Diagnostics:
OBD-II diagnostics, live data interpretation, specific sensor testing, actuator testing, common fault scenarios and their resolutions.
Component Testing:
Detailed procedures for testing electrical components (sensors, actuators), fuel system pressure, and diagnostic equipment usage.
Depth:
Comprehensive; covers from basic fluid checks and filter changes to complete engine and transmission overhauls, complex electrical diagnostics, and body repairs. Suitable for DIY enthusiasts and professional technicians.
Oil Change:
Every 12,500 miles or 12 months, whichever comes first (check specific manual for variations).
Timing Belt:
Typically every 70,000 - 90,000 miles or 5-6 years (critical replacement interval for DW10 engines, DO NOT DELAY).
Engine Oil:
Total Quartz INEO MC3 5W-30 or equivalent meeting PSA B71 2290 specification (low SAPS for DPF compatibility).
Coolant:
PSA specification coolant (e.g., Citroën -20°C Antifreeze/Coolant)
Diesel Particulate Filter:
DPF regeneration issues, clogging if driven mainly in short city trips, requiring periodic forced regeneration or cleaning.
Egr Valve:
EGR valve can become clogged with carbon deposits, leading to reduced performance and engine warning lights.
Suspension Components:
Wear in anti-roll bar links and bushings, especially on higher mileage vehicles.
Electrical Gremlins:
Occasional minor electrical faults can occur, often related to sensor issues or body control modules.
