Hi,
There is an alarm module that may be at fault. Because of the model year being newer, you should start by having the can-bus scanned for codes. CAN stands for controller area network. Basically, all the computers and modules are tied together via a few wires.
By performing this type of scan, it will retrieve codes from any of the modules and not just the powertrain control module. Here is a video showing how it is done:
https://youtu.be/InIlnsjOVFA
Let me know if that is something you can have done. Hopefully, it will point us in the right direction.
Take care,
Joe
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Sunday, July 11th, 2021 AT 7:51 PM