[dgandbver]

I think this is it:
From Savvy5:
All - just wanted to give an update. Took the Pathfinder to the dealership for a quick service and to have Doug (great service technician) look at the liftgate. He showed me an easy fix that works "most" of the time. 1) Turn the power-lift gate Off (by the steering column). 2) Manually open and then manually close the liftgate. 3) Manually open the liftgate again. 4) With the liftgate open, press and hold the power liftgate button on the liftgate itself until you hear a couple beeps. 5) Turn the power-lift gate On (by the steering column).

ymmv