Question 1

Infotainment screen freezing and rebooting (Focus Mk4)

Accepted Answer

The touchscreen infotainment system can freeze, reboot, lose Bluetooth or Apple CarPlay/Android Auto connections or show a blank screen. Most cases are fixed with software updates; a few need the display or control module replaced.

Question 2

Mild-hybrid and stop-start electrical faults (1.0 EcoBoost)

Accepted Answer

The 48V/12V mild-hybrid system can throw warnings, disable stop-start or leave the car unable to start, usually because of a weak 12V battery, a faulty battery monitoring sensor or a belt-driven starter-generator fault.

Question 3

Wet timing and oil pump belt degradation (1.0 EcoBoost)

Accepted Answer

The 1.0 EcoBoost runs its timing belt and oil pump belt in oil. With the wrong oil or long service intervals the belts break down and shed debris that can block the oil pickup strainer, causing a low oil pressure warning and, in the worst case, engine failure.

Ford FocusFocus Mk4

Known issues and common problems

Ford FocusFocus Mk4

Known issues and common problems

Infotainment screen freezing and rebooting (Focus Mk4)1 solutionsLow

Mild-hybrid and stop-start electrical faults (1.0 EcoBoost)1 solutionsMedium

Wet timing and oil pump belt degradation (1.0 EcoBoost)at 130000 km · 1 solutionsHigh