See also:

Theft deterrent system
Immobilizer system The vehicle's keys have built-in transponder chips that prevent the hybrid system from starting if the key has not been previously registered in the vehicle's on-board computer. ...

Vehicle Service Agreements
If you plan to keep your vehicle for several years or if you accumulate mileage quickly, you may want to purchase a Lexus vehicle service agreement. These agreements cover the cost of specific rep ...

Have the malfunction repaired immediately.
After taking the specified steps to correct the suspected problem, check that the warning light turns off. *1: Open door warning buzzer: The open door warning buzzer sounds to alert one or mor ...