"P" Position

WARNING: This page is about a different car, the 2006 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.

The same as for the "N" position, both the forward brake and the reverse brake are released, so torque from the input shaft drive is not transmitted to the output shaft.
The parking pawl linked with the select lever meshes with the parking gear and fastens the output shaft mechanically.

Fig 1: Power Transmission (P Position)

Courtesy of NISSAN MOTOR CO., U.S.A.