Lexus CT200h Owner's Manual page 536

4-3. Do-it-yourself maintenance
■ Tire pressure warning system
Your vehicle is equipped with a tire pressure warning system that
uses tire pressure warning valves and transmitters to detect low tire
inflation pressure before serious problems arise.
(P. 601)
The compact spare tire is not equipped with a tire pressure warning
valve and transmitter.
536
CT200h_U (OM76040U)