Still having exhaust fumes in my 2017 ford explore...

Still having exhaust fumes in my 2017 ford explorer I had to put a carbon dioxide monitor in my SUV because ford won't fix it they said can't figure it so take it home dropped a lot of money for their product will proablely be the last time I buy a ford very disappointed in the service and product now I'm stuck with a dangerous car I'm not comfortable with putting my grandkids in this is a terrible way to treat your customers