Question 1

DPF blockage from short journeys (1.5 EcoBlue)

Accepted Answer

The diesel particulate filter on the 1.5 EcoBlue needs regular sustained runs at motorway speeds to regenerate. Cars used mainly for short urban trips light up the DPF warning, lose power and may go into limp mode; repeated interrupted regenerations also dilute the engine oil with diesel.

Question 2

AdBlue (SCR) system faults (1.5 EcoBlue)

Accepted Answer

The SCR emissions system on the 1.5 EcoBlue can develop faults in the AdBlue pump, tank heater, NOx sensors or dosing injector, often caused by crystallised fluid. The dashboard shows an emissions warning and a countdown in miles after which the engine will not restart.

Question 3

Wet timing belt wear on the 1.5 EcoBlue

Accepted Answer

The 1.5 EcoBlue EcoBlue diesel uses a timing belt that runs in oil. Degraded belts shed material that clogs the oil pickup and can lead to low oil pressure, a slipping belt and serious engine damage. Using the correct oil and replacing the belt on time are critical.

Ford FocusFocus Mk4

Known issues and common problems

Ford FocusFocus Mk4

Known issues and common problems

DPF blockage from short journeys (1.5 EcoBlue)1 solutionsMedium

AdBlue (SCR) system faults (1.5 EcoBlue)1 solutionsHigh

Wet timing belt wear on the 1.5 EcoBlueat 160000 km · 1 solutionsHigh