The contact owns a 2014 Ford Expedition. The contact stated while driving 60 MPH, the vehicle unintendedly downshifted. The contact turned on the hazard lights and shifted into neutral(N) and coasted to the side of the roadway. The contact restarted the vehicle however, the vehicle failed to exceed 20 MPH. The failure was self-corrected but returned intermittently. The check engine warning light illuminated, and the failure became more persistent. The contact stated that while idling, the transmission was downshifting. The vehicle was taken to a certified mechanic who diagnosed the vehicle and determined that the TCM and engine had failed. The mechanic had stated the TCM needed to be flushed, and the computer system needed reprogramming. The vehicle was in the process to be repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline. The approximate failure mileage was 149,000.

- Stewartsville, NJ, USA