2015 Lincoln Navigator - What can fix this tailgate issue?

back tail gate opens on it own

That is not a good situation at all . So what are you going to do about it ?

While sitting parked, or driving down the road?

Cool!

What’s your question?

My first check would be the wires that go from the body of the car to the tailgate. Looking at broken or shorted wires.

Turn off the power tail gate with the switch on the dashboard. If that solves the problem, there may be an issue with the power actuation system. If not, it seems more likely a latch problem.

Can this be done from your key fob? If so, are you sure the button isn’t accidentally getting pressed?

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