Citroën C6 1

Large PSA four-cylinder diesel with 163–204 hp in various outputs. Punchy and strong on torque, but rarer than the 2.0 HDi. Belt-driven timing with a complex replacement procedure.

• !! Sequential bi-turbo system — wear and failures from 120,000 km

  The DW12 uses two turbos in a parallel sequential arrangement. The small turbo works alone up to 1,400 rpm; both operate from 2,500 rpm. Seizure or bearing wear in one turbo causes uncontrolled boost pressure. Complex and expensive to repair.

  Symptoms: Power loss, whistling/rattling noises, smoke, fault code.
  800–2,500 $
  Ad turbocharger DW12 2.2 HDi C5 C6bi-turbo PSA DW12 replacement
• !! FAP/DPF — difficult regeneration, known weak point from 100,000 km

  The 2.2 HDi with EOLYS-based FAP is considered particularly susceptible to DPF problems. Lack of motorway driving leads to blockage. Regeneration failure increases oil dilution. Some mechanics fundamentally advise against this engine for short-trip drivers.

  Symptoms: FAP warning light, power loss, limp mode, strong fuel smell in oil.
  800–2,500 $
  Ad DPF FAP C5 2.2 HDi DW12particulate filter PSA 2.2 HDi
• !! Head gasket — cracks at high mileage from 200,000 km

  Under high mileage and thermal stress, DW12 cylinder heads can develop cracks. Known among mechanics as a problematic engine. In isolated cases, a complete engine swap from 2.2 to 2.0 HDi has been performed.

  Symptoms: Coolant loss, mayonnaise in oil, overheating, white exhaust smoke.
  1,000–3,000 $
  Ad cylinder head gasket DW12 2.2 HDicylinder head gasket PSA 2.2 HDi C5 C6

+ 3 more engine weaknesses + vehicle weaknesses

First PSA V6 diesel with 204 hp. Predecessor of the 3.0 HDi V6, also automatic-only. Complex and maintenance-intensive, but very refined running.

• !! Injection system — pump and injector wear from 120,000 km

  The common-rail injection system in the Jumpy II 2.0 HDi starts showing weaknesses from 80,000–120,000 km. High-pressure pump failure sends metal swarf to the injectors. A complete fuel system flush is mandatory after pump failure.

  Symptoms: Difficult starting, power loss, rough idle, metallic odour in fuel.
  600–2,500 $
  Ad high-pressure fuel pump Jumpy II 2.0 HDifuel injector Citroen Jumpy 2.0 HDi UHN
• !! VNT turbocharger — vane blockage and actuator fault from 130,000 km

  The variable geometry turbo on the Jumpy II suffers from soot deposits on the vanes, especially in city use. Actuator faults lead to power loss or overboost (limp mode). Regular motorway driving prevents this.

  Symptoms: Limp mode, power loss, whistling, black smoke under load.
  500–1,500 $
  Ad turbocharger Jumpy II 2.0 HDi 100kWVNT turbo PSA UHN Jumpy
• !! Timing chain stretches, camshaft timing inaccurate from 180,000 km

  The timing chain of the 2.7 HDi V6 (UHN/DT17TED) stretches similarly to the 3.0 HDi UHZ. Timing becomes inaccurate, causing power loss and in extreme cases valve contact. Expensive to repair as V6 tooling and V6 chains are required.

  Symptoms: Rattling on cold start, rough idle, engine warning light with camshaft fault, missing power in the upper rev range.
  1,500–6,000 $
  Ad timing chain 2.7 HDi V6 UHNTiming Chain DT17TEDtiming chain kit 607 2.7 V6 HDichain tensioner 2.7 V6

+ 3 more engine weaknesses + vehicle weaknesses

PSA V6 diesel with 240 hp and high torque. Impressive powertrain for the luxury segment, but complex and expensive to maintain. Available with automatic only.

• !! Turbocharger — bearing wear in commercial use from 130,000 km

  The turbocharger on the 2.2 HDi UHZ wears sooner than in private-car use due to high mileage and commercial vehicle loading. Oil sludge from extended service intervals is a frequent cause. Flushing the turbo oil feed line at every oil change is recommended.

  Symptoms: Whistling, power loss, blue exhaust smoke, oil in intake hose.
  700–2,000 $
  Ad turbocharger UHZ 2.2 HDi Jumpy C8turbocharger PSA 2.2 HDi 94kW
• !! Injector seals — leakage under high load from 100,000 km

  Copper seals and rubber seals on the 2.2 HDi injectors leak under high temperature swings and intensive load operation. Leaking injectors contaminate the oil and cause combustion gas blow-by.

  Symptoms: Soot deposits around injectors, oil contamination in engine bay, rough idle.
  200–700 $
  Ad fuel injectordichtring 2.2 HDi UHZfuel injector gasket PSA 2.2 HDi Jumpy
• !! DPF/FAP — blockage in van short-trip operation from 100,000 km

  Commercial operation with short trips is harmful to the DPF. The EOLYS-based FAP system only regenerates on sufficiently long journeys. In urban delivery use, regenerations frequently fail and the filter clogs prematurely.

  Symptoms: FAP warning light, limp mode, strong fuel smell, increased fuel consumption.
  800–2,500 $
  Ad DPF FAP 2.2 HDi UHZ Jumpyparticulate filter C8 2.2 HDi

+ 3 more engine weaknesses + vehicle weaknesses

PSA V6 petrol with timing belt. Refined running and good power, but high consumption. Timing belt replacement complex and expensive due to V arrangement.

• !! Timing belt — complex replacement on V6 from 120,000 km

  The ES9 3.0 V6 has a timing belt whose replacement is very labour-intensive due to the V6 architecture. The belt also drives the camshafts of both cylinder banks. Neglected intervals lead to total engine damage on failure.

  Symptoms: On failure: immediate engine shutdown, metallic hammering from the engine, bent valves, no compression
  600–1,500 $
  Ad timing belt kit ES9 3.0 V6 PSAtiming belt XFV ES9 Citroën C5 Peugeot 407Steuerrieme kit 3.0 V6 PSA
• !! Pencil coil failure from 80,000 km

  The slim pencil coils on the V6 are prone to wear, especially the factory-fitted original types. A coil failure causes misfires in individual cylinders and rough running.

  Symptoms: Engine stumbling, misfire warning light, rough running at certain revs, power loss
  80–350 $
  Ad ES9 pencil Spuleignition coil PSA 3.0 V6ignition coil ES9J4SDelphi Spule ES9
• !! Camshaft cover oil leak from 100,000 km

  Sealing rings and gaskets on the V6 camshaft cover become brittle and start leaking. Oil can drip onto hot engine components and in the worst case cause an engine fire.

  Symptoms: Oil spots in the engine bay, burning smell, visible oil traces on the cam cover
  150–500 $
  Ad ES9 cylinder head cover gasketcamshaft Deckel gasket PSA V6ES9J4S valve cover gasket

+ 3 more engine weaknesses + vehicle weaknesses