NHTSA Complaint #11544243 — 2018 FORD TRANSIT

We was going to a week long camp.The individual in the front passenger seat said to the driver that he was not feeling good and told the driver that he was going to take a nap. Before he laid back he looked in the back of the van to check on the kids. As he looked back one kid appeared to be having a seizure. So the driver immediately pulled over. I was following in another van. So I pulled over and went up to the van to see what the issue was and opened the side door. The kids was all hanging there heads sick and vomiting.We hurried and called 911 for help.When the medics got there they informed us of carbon monoxide poisoning. So we took the van to the next town and dropped the van off at the dealership and had to rent another van to go on with our trip. So on our way back home we picked the van back up from the dealership. It was after hours so we called ahead and paid for the repair. They replaced the rear door seal. How ever before we picked it up we purchased a co detector to put in the van. We went a very short distance and the alarm went off. so we had to travel the rest of the way home with the windows down approximately 10 hours. We now have the van at another dealership back closer to home. the dealership is now telling us there is a plug missing under the van and that we need to buy a tail pipe extension that ford has designed to get the exhaust fumes out from under the van. they are also telling us that the vehicle will not pass a state safety inspection with it dumping the exhaust fumes under the van and this will be repaired at our expense. Now my question is if there was not a design flaw why did Ford design a tail pipe extension? Also as i drive down the road I notice all the newer van have an extended tail pipe. Also would the tail pie not be part of the emissions and if it is why would this not be covered by the 8 year 80000 mile emissions warranty? this is a very serious situation. As we talked to a phyishion she said we was minutes from death