[jbl]

Odd. I believe my 2018 model year Volvo allows me to start the car, take the key with me, and lock the doors (so long as I take my key fob with me).

[throwaway946513]

I'm guessing that the parent has a physical key and the fob won't let them lock it.

My '05 Nissan Altima let me start the engine with a physical key, and then lock the car with the fob.