Ford F-350, F-450 +1 more: Engine

Affects Ford F-350, F-450, F-550 · 2011–2012 — about 50 vehicles.

The hazard

Certain ambulance package vehicles with 6.7L diesel engines may experience a "stop safety now" warning message and 5 audible chimes while the vehicles gradually loses power, eventually resulting in the engine stalling when speed falls below 5 km/h. If this were to occur while the ambulance is transporting a patient, engine shutdown with no ability to restart could interfere with patient care and increase the risk of injury to the patient. Correction: Dealers will replace the exhaust gas temperature (EGT) sensor located downstream of the diesel particulate filter (DPF).

What to do

Contact your dealer; the remedy details were not included in the filing.

Critical — crash/injury risk now High — injury risk; see remedy Moderate — fix at next service Low — minor / informational