0445110489 — Symptoms & Failure Modes
Common symptoms and verified failure modes of a failing Bosch 0445110489 1.5 TDCi Common Rail Injector (Ford Fiesta/Focus/Transit Connect).
Rough idle / vibration · high
A leaking injector unbalances cylinder fuelling on the 1.5 TDCi.
Hard starting · high
Excess back-leakage bleeds cranking rail pressure.
Loss of power / limp mode · high
Out-of-range delivery or rail-pressure deviation cuts power.
Black smoke · medium
Poor atomisation over-fuels the cylinder.
Engine management light · medium
Cylinder-specific injector or fuel-metering codes.