The contact owns a 2017 Ford Focus. The contact stated while the vehicle was stopped at a traffic light, the accelerator pedal was depressed and the transmission failed to shift properly, with the check engine warning light illuminated. The vehicle was towed to an independent mechanic where it was diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was not repaired. The dealer was contacted. The vehicle was not diagnosed or repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 92,000.