Engine light came on when my hybrid Limited was less than two weeks old

This was the message: “a possible condition with your engine control system has been detected. A full system check is recommended to be done when convenient. Please contact your local dealership to schedule an appointment.“
I took it to my dealer and it’s been with them for the past week. I was told my vehicle needs a temperature management component. I was told it was ordered for expedited delivery but it’s been a week now so I’ve asked for an update and haven’t heard yet. Meanwhile I have a rental provided by Hyundai which is a small Chevy.