I am new to lexus, and got my 2024 Rx350 AWD this March. Today I remote started the vehicle from inside my work place, like I normally do on a hot day. When I approached the vehicle it already finished running for 10 minutes. When I entered the car, a continuous beeping noise was coming from the console. I didn't know what to do. Nothing on the display. I was trying to call the dealer. In the meantime the beeping stopped after 3 or 4 minutes of me entering the car.
Anyone knows why this could happen?

 

Did you ever figure out what this was? Something nearly identical happened to me. NX450h+ 2024. Remote start was not involved. Turning off the car did not stop the beep! Checked all 5 doors, still beeping. I started to drive home to find a wrench to disconnect the battery. Stopped one more time, turned off the car, still beeping, turned back on, and the beep stopped. Total time was 3 or 4 minutes just like you.

What made this even more annoying is that I had Progressive Snapshot telematics plugged into the OBD port and for this "trip" it it recorded completely bogus hard brake and fast acceleration events, knocking down my driver rating by one star.