Lexus GS450h Owner's Manual page 581

A warning light turns on or a warning message is displayed
When a warning light turns on or a warning message is displayed, refer to
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P. 460, 466.
When a problem has occurred
If you have a flat tire
Vehicles with spare tire
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Stop the vehicle in a safe place and replace the flat tire with the spare tire.
(P. 498)
Vehicles without spare tire
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Stop the vehicle in a safe place and repair the flat tire temporarily with the
emergency tire puncture repair kit. (P. 509)
The vehicle becomes stuck
Try the procedure for when the vehicle becomes stuck in mud, dirt, or snow.
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(P. 542)
GS450h_300h_OM_OM30F92E_(EE)
What to do if... (Troubleshooting)
581