The contact owns a 2018 Ford F-150. The contact stated that the START/STOP feature intermittently failed to operate as needed. There was no warning light illuminated. The contact stated that while pulling out of a parking lot and entering traffic, another vehicle attempted to run a red light. The contact stated that the vehicle was unable to accelerate due to the failure with the START/STOP feature, and the other vehicle crashed into the contact's vehicle. The air bags deployed upon impact. No injuries were reported. A Police report was filed. The vehicle was towed to the residence after the crash. The dealer and the manufacturer were notified of the failure. The vehicle was not repaired. The failure mileage was unknown.