Boy, that would be enough to scare the heck out of someone. LOL The power liftgate system utilizes its own liftgate control module. This power liftgate module contains all the solid-state hardware and software used to control the power liftgate system. If I had to guess, that is where the problem is located.
I attached a pic below of the module location. Before just arbitrarily replacing it, I would recommend scanning the can-bus system. CAN stands for controller area network.
Basically, all the different computers/modules are tied together via a few wires. If there is a diagnostic trouble code stored, this should retrieve it for you and confirm what is happening.
Here is a link that explains how it's done:
Let me know what you find or if you have other questions.
Saturday, September 10th, 2022 AT 8:15 PM