At a glance
What can fail
The steering column assembly may have a manufacturing defect that allows the shifter to detach. If detached, you cannot shift into park, and the truck could roll if the parking brake isn't set.
What the fix does
Ford will mail you instructions to bring your truck to a dealership for inspection and replacement of the steering column if needed.
Summarized — see the official notice for exact wording, dates, and contacts.