It'll never happen. It's kind of a psychological negative statement about the vehicle.
Years ago, before Ford took Jaguar over, Jags were universally known as being very "maintenance intensive" and prone to problems. One year they put an ad out on their newest model's features, one of which was its own complete tool kit. Consumer tests on the ad revealed that the reaction of most people seeing the ad thought heck yeah of course it needs it own complete tool kit since it will be just as undependable as their other models. Jaguar dropped the reference to the tool kit in their ad since it focused people's attention to a supposition that the car will be undependable.
For Ford to include a code reader is the same thing as showcasing a subliminal message stating to potential buyers that "here's a handy item for when this vehicle has a problem and/or breaks down".
And besides, not having a code reader gives incentive to bring your vehicle to the local Ford dealership to pay them to read the code and provide their service dept with revenues for the resulting work. If the manufacturer included the code reader in the first place that's a little like taking potential service business away from the local dealership.
