Have the malfunction repaired immediately.
Lexus GX / Lexus GX Owners Manual / When trouble arises / Steps to take in an emergency / If a warning message is displayed / Have the malfunction repaired immediately.
After taking the specified steps to correct the suspected problem, check that the warning message and light go off.
See also:
Light bulbs
You may replace the following bulbs yourself. The difficulty level of
replacement varies depending on the bulb. If necessary bulb
replacement seems difficult to perform, contact your Lexus dealer.
...
Navigation system: basic functions
Basic information before operation ...
Installing the spare tire
Remove any dirt or foreign matter from the wheel contact surface.
If foreign matter is on the wheel contact surface, the wheel nuts may loosen
while the vehicle is in motion, and the tire may com ...