PTBA Trailer Target Sticker
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
The PTBA trailer target sticker is attached to the trailer during initial setup and used by the rear parking aid camera and IPMA to calculate the angle of the trailer based on the dimensions entered in the audio system display.
Refer to the Owner's Literature (Pro Trailer Backup Assist™ Quick Start Guide) to find the detailed instructions on how to properly position the PTBA trailer target sticker on the trailer.
If there is no viable location on the trailer to install the target sticker or if their are objects in the way of the target sticker, then using a yaw rate sensor becomes a practical solution.
NOTE:
Additional target stickers can be ordered through a Ford dealer parts department.