✓ The faults of this engine were checked against sources (10/2026). Each item has at least two independent sources or an official recall or parts-maker technical note.
Swirl flaps stick or the flap linkage breaks (P2015)
usually 100,000–220,000 km · Medium risk
model years 2005–2016 only
Signs: Engine light with P2015 and 'Engine system service required', weak pulling at low revs, sometimes limp mode
Fix: Check the joint between actuator and flap shaft; fit a new joint or swirl flap kit, cleaning the soot from the inlet ports if the flaps are coked
€150–900
Auxiliary belt tensioner or pulley fails; belt debris can wreck the timing belt
usually 100,000–250,000 km · High risk
Signs: Squeal, rattle or vibrating tensioner at the front of the engine; a snapped belt can be pulled behind the timing cover and make the timing belt jump
Fix: Replace the auxiliary belt, tensioner and idler pulleys with every timing belt change, and at once if they are noisy or wobble
€150–3,500
EGR valve sticking or clogging with soot
usually 120,000–220,000 km · Medium risk
Signs: Hesitation, power loss, engine light with EGR codes, limp mode
Fix: Clean or replace the EGR valve and adapt it with a diagnostic tool; check the EGR cooler
€300–900
DPF clogging and oil dilution from interrupted regenerations
usually 100,000–200,000 km · Medium risk
Signs: DPF warning, frequent regenerations, power loss; oil level rising above max on short-trip cars
Fix: Check the differential pressure sensor, run a forced regeneration or clean / replace the DPF; change diluted oil at once
€150–1,800
Variable turbo vanes stick or the turbo actuator fails
usually 120,000–250,000 km · Medium risk
model years 2005–2016 only
Signs: Limp mode under load, overboost or underboost codes, uneven pull
Fix: Check actuator movement in live data; free and clean the vane mechanism or replace the electronic actuator (calibrate after fitting)
€300–1,200
Injector wear or failure
usually 180,000–300,000 km · Medium risk
Signs: Rough idle, black smoke, hard cold start, injector correction values out of range
Fix: Check leak-off and correction values; recondition or replace faulty injectors with new seals and clamps
€300–1,500