Page 416 of 544
4167-2. Steps to take in an emergency
GS450h_OM_OM30E99U_(U)
(If equipped)
Indicates that the radar sensor is dirty or covered with
iceA buzzer also sounds.
Clean the sensor.
(If equipped)
Indicates that the dynamic radar cruise control system
cannot be used temporarily due to bad weather
A buzzer also sounds.
Use the radar cruise control system when it
becomes available again.
(If equipped)
Indicates that the radar crui se control system brake con-
trol function is temporarily unavailable
Depress the brake.
Indicates a malfunction in the smart access system with
push-button start
A buzzer also sounds.
Have the vehicle inspected by your Lexus dealer.
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Page 417 of 544
4177-2. Steps to take in an emergency
GS450h_OM_OM30E99U_(U)
7
When trouble arises
(If equipped)
Indicates that a Blind Spot Monitor sensor or the sur-
rounding area on the bumper is dirty or covered with iceA buzzer also sounds.
Clean the sensor and its surrounding area on the
bumper.
Indicates a malfunction in th e cruise control system or
dynamic radar cruise control system (if equipped)
Press the “ON/OFF” button once to deactivate the
system, and then press the button again to reactivate
the system.
A buzzer also sounds.
Have the vehicle inspected by your Lexus dealer.
(If equipped)
Indicates a malfunction in th e dynamic radar cruise con-
trol with full-speed range Depress the brake pedal.
A buzzer also sounds.
Have the vehicle inspected by your Lexus dealer.
(If equipped)
Indicates a malfunction in the LKA (Lane-Keeping
Assist) system
A buzzer also sounds.
Have the vehicle inspected by your Lexus dealer.
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Page 420 of 544

4207-2. Steps to take in an emergency
GS450h_OM_OM30E99U_(U)
(If equipped)
Indicates a malfunction in the DRS (Dynamic Rear
Steering) A buzzer also sounds.
Have the vehicle inspected by your Lexus dealer.
Indicates a malfunction in th e electronically controlled
brake system A buzzer also sounds.
Immediately stop the vehicle in a safe place and
contact your Lexus dealer. Continuing to drive in
this condition is dangerous.
Indicates an attempt was made to engage the parking
brake while driving
A buzzer also sounds.
Press the parking brake switch. If the warning mes-
sage is still displayed, have the vehicle inspected by
your Lexus dealer.
Indicates a malfunction in the parking brake system
A buzzer also sounds.
Press the parking brake switch. If the warning mes-
sage is still displayed, have the vehicle inspected by
your Lexus dealer.
(If equipped)
Indicates that LKA (Lane-Ke eping Assist) system cannot
be used due to the vehicle speed being too high
Slow down.
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Page 421 of 544

4217-2. Steps to take in an emergency
GS450h_OM_OM30E99U_(U)
7
When trouble arises
Indicates that the power switch is turned off or turned to
ACCESSORY mode and the driver’s door is opened
while the lights are turned onA buzzer also sounds.
Turn the lights off.
(If equipped)
Indicates that the moon roof is not fully closed (with the
power switch off, and the driver’s door open)
A buzzer also sounds.
Close the moon roof.
Indicates that the windows are not fully closed (with the
power switch off, and the driver’s door open)
A buzzer also sounds.
Close all the windows.
(If equipped)
Indicates that the windows and the moon roof are not
fully closed (with the power switch off, and the driver’s
door open)
A buzzer also sounds.
Close all the windows and the moon roof.
Indicates a malfunction in the brake hold system
A buzzer also sounds.
Have the vehicle inspected by your Lexus dealer
immediately.
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Page 422 of 544
4227-2. Steps to take in an emergency
GS450h_OM_OM30E99U_(U)
Indicates that the brake hold system cannot be turned offA buzzer also sounds.
Depress the brake pedal.
Indicates that the brake hold system is not available
The reason the brake hold system is not available may
be displayed.
A buzzer also sounds.
Close the driver’s door.
Fasten the driver’s seat belt.
Indicates that the brake hold system is unable to con-
tinue brake hold function
The reason the brake hold system is not continue may
be displayed.
A buzzer also sounds.
Depress the brake pedal.
Close the driver’s door.
Fasten the driver’s seat belt.
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Page 423 of 544
4237-2. Steps to take in an emergency
GS450h_OM_OM30E99U_(U)
7
When trouble arises
Indicates that the vehicle is unable to drive over 65 mph
(110 km/h) until the transmission warms upA buzzer also sounds.
Wait until the transmission warms up.
Indicates that the parking brake is set automatically while
the brake hold system is holding the brakes
A buzzer also sounds.
Release the parking brake.
Indicates a malfunction in th e drive start control system
A buzzer also sounds.
Have the vehicle inspected by your Lexus dealer
immediately.
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Page 424 of 544
4247-2. Steps to take in an emergency
GS450h_OM_OM30E99U_(U)
Indicates a malfunction in the brake override systemA buzzer also sounds.
Have the vehicle inspected by your Lexus dealer.
Indicates that engine oil level is low
This message may appear if the vehicle is stopped on a
slope. Move the vehicle to a level surface and check to
see if the message disappears.
A buzzer also sounds.
Check the level of engine oil, and add if necessary.
Indicates that the hybrid system has overheated
This message may be disp layed when driving under
severe operating conditions. (For example, when driv-
ing up a long steep hill.)
A buzzer also sounds.
Stop and check. ( P. 4 5 7 )
Indicates a malfunction in:
• The Automatic High Beam system (if equipped);
• The AFS (Adaptive Front-lighting System) (if equipped); or
• The LED headlight system
A buzzer also sounds.
Have the vehicle inspected by your Lexus dealer.
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Page 425 of 544
4257-2. Steps to take in an emergency
GS450h_OM_OM30E99U_(U)
7
When trouble arises
Indicates that the accelerator and brake pedals are
being depressed simultaneously, and the brake override
system is operating.
Release the accelerator or brake pedal. ( P. 1 6 7 )
Indicates that the tire in flation pressure is low
Check the tire inflation pressure, and adjust to the
appropriate level.
Indicates a malfunction in th e tire pressure warning sys-
tem
Stop the vehicle in a safe place and turn the power
switch off then on again. If the tire pressure warning
indicator flashes for 1 minute then illuminates, there
is a malfunction in the system. Have the vehicle
inspected at your Lexus dealer.
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