Gas Recirculation Valve (egr Valve) problems of the 2018 Hyundai Santa Fe

On 2/8/2019 an update for the knock sensor was done on my vehicle. On 2/18/19 I was driving up a steep hill on a highway when my vehicle lost power upon acceleration. I was unable to go faster than 17 mph uphill and 50 mph on level highway (speed limit is 70 mph). It was 16 degrees f and I had an infant in the car. I was told by the dealership it is likely due to the update done on the knock sensor and to drive it to their dealership. I did not feel it was safe to drive any further than necessary so I had it towed (I had to pull over constantly because the speed limit is 70 mph). The dealer ran a diagnostic and it came back it needs a new engine. The current engine only has approx. 14,500 miles on the odometer. The dealer requested a new engine from Hyundai but it has not been approved yet and they believe it is a result of the knock sensor update. They estimate I will not have my vehicle repaired for at least 3 months. The dealer said they are having several other vehicles of this same make, model and year come in for the same problem. It was very hazardous having a vehicle unable to accelerate in winter with an infant in the car. I was in a remote area and this could have had the potential for a much worse outcome than it did.