WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Remove the PTU from the vehicle.
Place the PTU on a suitable work surface.
Courtesy of CHRYSLER GROUP, LLC
Using a suitable sharp chisel (1), pierce a hole in the center of the plug (2).
Courtesy of CHRYSLER GROUP, LLC
Drive the chisel (1) side ways to lever the plug (2) out of the PTU.