2023 TOYOTA PRIUS PRIME warning light

5608-2. Steps to take in an emergency
■Intuitive parking assist OFF indicator (warning buzzer)
■Slip indicator light
■Inappropriate pedal operation warning light* (warning buzzer)
*: This light illuminates on the multi-information display with a message.
Warning lightDetails/Actions
When a buzzer sounds:
Indicates a malfunction in the Intuitive parking
assist function
Have the vehicle inspected by your Toyota
dealer immediately.
When a buzzer does not sound:
Indicates that the system is temporarily unavail-
able, possibly due to a sensor being dirty or cov-
ered with ice, etc.
 Follow the instructions displayed on the
multi-information display. ( P.365, 566)
Warning lightDetails/Actions
Indicates a malfunction in:
The VSC system;
 The TRAC system; or
 The hill-start assist control system
 Have the vehicle inspected by your Toyota
dealer immediately.
Warning lightDetails/Actions
When a buzzer sounds:
Brake Override System is malfunctioning
 Drive-Start Control is malfunctioning
 Drive-Start Control is operating
 Follow the instructions displayed on the
multi-information display.
When a buzzer does not sound:
Brake Override System is operating.
 Release the accelerator pedal and
depress the brake pedal.

5618-2. Steps to take in an emergency
8
When trouble arises
■Brake hold operated indicator (warning buzzer)
■Parking brake indicator (warning buzzer)
■Tire pressure warning light (warning buzzer)
Warning lightDetails/Actions
(Flashes)
Indicates a malfunction in the brake hold system
 Have the vehicle inspected by your Toyota
dealer immediately.
Warning lightDetails/Actions
(U.S.A.)
(Flashes)
(Canada)
(Flashes)
It is possible that the parking brake is not fully
engaged or released
 Operate the parking brake switch once
again.
This light comes on when the parking brake is
not released. If the light turns off after the park-
ing brake is fully released, the system is operat-
ing normally.
Warning lightDetails/Actions
When the light comes on after blinking for
approximately 1 minute (a buzzer does not
sounds):
Malfunction in the tire pressure warning system
 Have the system checked by your Toyota
dealer.
When the light comes on (a buzzer sounds):
 Low tire inflation pressure from natural causes
 After the temperature of the tires has low-
ered sufficiently, check the inflation pres-
sure of each tire and adjust them to the
specified level.
 Low tire inflation pressure from flat tire
 Immediately stop the vehicle in a safe
place and perform the necessary actions.

5628-2. Steps to take in an emergency
■Low fuel level warning light
■Driver’s and front passenger’s seat belt reminder light (warn-
ing buzzer*)
*: Driver’s seat belt warning buzzer:The driver’s seat belt warning buzzer sounds to alert the driver that his or
her seat belt is not fastened. Once th e power switch is turned to ON, the
buzzer sounds. If the seat belt is still unfastened, the buzzer sounds inter-
mittently for a certain period of time after the vehicle reaches a certain
speed.
Front passenger’s seat belt warning buzzer:
The front passenger’s seat belt warning buzzer sounds to alert the front
passenger that his or her seat belt is not fastened. If the seat belt is
unfastened, the buzzer sounds intermit tently for a certain period of time
after the vehicle reaches a certain speed.
■Rear passengers’ seat belt reminder light*1 (warning
buzzer*2)
*1: Regardless of whether or not a rear passenger is present, this light will
also illuminate for a certain period of time after the rear door is opened
and closed.
*2: Rear passengers’ seat belt warning buzzer: The rear passengers’ seat belt warning buzzer sounds to alert the rear
Warning lightDetails/Actions
Indicates that remaining fuel is approximately
1.7 gal. (6.0 L, 1.4 Imp. gal.) or less
 Refuel the vehicle.
Warning lightDetails/Actions
Warns the driver and/or front passenger to fas-
ten their seat belts
 Fasten the seat belt.
If the front passenger’s seat is occupied,
the front passenger’s seat belt also needs
to be fastened to m ake the warning light
(warning buzzer) turn off.
Warning lightDetails/Actions
Warns the rear passengers to fasten their seat
belts
 Fasten the seat belt.

5638-2. Steps to take in an emergency
8
When trouble arises
passenger that his or her seat belt is not fastened. If the seat belt is
unfastened, the buzzer sounds intermitte ntly for a certain period of time,
after the seat belt is fastened and unfastened and the vehicle reaches a
certain speed.
■Warning buzzer
In some cases, the buzzer may not
be heard because of noisy place or
an audio sound.
■Front passenger detection sen-
sor, seat belt reminder and
warning buzzer
●If luggage is placed on the front
passenger seat, the front passen-
ger detection sensor may cause
the warning light to flash and the
warning buzzer to sound even if a
passenger is not sitting in the
seat.
●If a cushion is placed on the seat,
the sensor may not detect a pas-
senger, and the warning light may
not operate properly.
■If the malfunction indicator
lamp comes on while driving
First check the following:
●Is the fuel tank empty?
If it is, fill the fu el tank immediately.
●Is the fuel tank cap loose?
If it is, tighten it securely.
The light will go off after several
driving trips.
If the light does not go off even after
several trips, contact your Toyota
dealer as soon as possible.
■Electric power steering system
warning light (warning buzzer)
When the 12-volt battery charge
becomes insufficient or the voltage
temporarily drops, the electric power
steering system warning light may
come on and the warning buzzer
may sound.
At this time, the functions of the air
conditioning, etc. may be partially
limited in order to reduce the power consumption of the 12-volt battery.
■When the tire pressure warning
light comes on
Inspect the tires to check if a tire is
punctured.
If a tire is punctured: P.574
If none of the tires are punctured:
Turn the power switch off then turn it
to ON.
Check if the tire pressure warning
light comes on or blinks.
If the tire pressure warning light
blinks for approximately 1 minute
then stays on
There may be a malfunction in the
tire pressure wa rning system. Have
the vehicle inspected by your
Toyota dealer immediately.
If the tire pressure warning light
comes on
After the temperature of the tires
has lowered sufficiently, check the
inflation pressure of each tire and
adjust them to th e specified level.
If the warning light does not turn off
even after several minutes have
elapsed, check that the inflation
pressure of each tire is at the speci-
fied level and perform the tire infla-
tion pressure setting procedure.
(  P.524)
If the warning light does not turn off
even after several minutes have
elapsed since performing the tire
inflation pressure setting proce-
dure, have the vehicle inspected by
your Toyota dealer as soon as pos-
sible.

5648-2. Steps to take in an emergency
■The tire pressure warning light
may come on due to natural
causes
The tire pressure warning light may
come on due to natural causes such
as natural air leaks and tire inflation
pressure changes caused by tem-
perature. In this case, adjusting the
tire inflation pressure will turn off the
warning light (after a few minutes).
■Conditions that the tire pres-
sure warning system may not
function properly
 P.517
WARNING
■If a warning light comes on or
a warning buzzer sounds
when a warning message is
shown on the multi-informa-
tion display
*
Check and follow the message
shown on the multi-information
display.
Failure to do so may result in
death or serious injury.
*: Warning lights illuminate in red
or yellow and the warning
buzzer beeps once or sounds
continuously.
■When the electric power
steering system warning light
comes on
When the light comes on yellow,
the assist to the power steering is
restricted. When the light comes
on red, the assist to the power
steering is lost and handling oper-
ations of the steering wheel
become extremely heavy.
If the steering wheel becomes
heavier than usual when operat-
ing, hold firmly and operate using
more force than usual.
■If the tire pressure warning
light comes on
Be sure to observe the following
precautions. Failure to do so
could cause a loss of vehicle con-
trol and result in death or serious
injury.
●Stop your vehicle in a safe
place as soon as possible.
Adjust the tire inflation pressure
immediately.
●If the tire pressure warning light
comes on even after tire infla-
tion pressure adjustment, it is
probable that you have a flat
tire. Check the tires. If a tire is
flat, repair the flat tire by using
emergency tire puncture repair
kit.
●Avoid abrupt maneuvering and
braking. If the vehicle tires dete-
riorate, you could lose control of
the steering wheel or the
brakes.
■If a blowout or sudden air
leakage should occur
The tire pressure warning system
may not activate immediately.
■Maintenance of the tires
Each tire, includ ing the spare (if
provided), should be checked
monthly when cold and inflated to
the inflation pressure recom-
mended by the vehicle manufac-
turer on the vehicle placard or tire
inflation pressure label (tire and
load information label). (If your
vehicle has tires of a different size
than the size indicated on the
vehicle placard or tire inflation
pressure label [tire and load infor-
mation label], you should deter-
mine the proper tire inflation
pressure for those tires.)

5658-2. Steps to take in an emergency
8
When trouble arises
WARNING
As an added safety feature, your
vehicle has been equipped with a
tire pressure monitoring system
(TPMS-tire pressure warning sys-
tem) that illuminates a low tire
pressure telltale (tire pressure
warning light) when one or more
of your tires is significantly under-
inflated. Accordingly, when the
low tire pressure telltale (tire pres-
sure warning light) illuminates,
you should stop and check your
tires as soon as possible, and
inflate them to the proper pres-
sure. Driving on a significantly
under-inflated tire causes the tire
to overheat and can lead to tire
failure. Under-inflation also
reduces fuel efficiency and tire
tread life, and may affect the vehi-
cle’s handling and stopping abil-
ity.
Please note that the TPMS (tire
pressure warning system) is not a
substitute for proper tire mainte-
nance, and it is the driver’s
responsibility to maintain correct
tire pressure, even if under-infla-
tion has not reached the level to
trigger illumination of the TPMS
low tire pressure telltale (tire pres-
sure warning light).
Your vehicle has also been
equipped with a TPMS (tire pres-
sure warning system) malfunc-
tion indicator to indicate when the
system is not operating properly.
The TPMS (tire pressure warning
system) malfunction indicator is
combined with the low tire pres-
sure telltale (tire pressure warning
light). When the system detects a
malfunction, the telltale will flash
for approximately one minute and
then remain continuously illumi-
nated. This sequence will con-
tinue upon subsequent vehicle
start-ups as long as the malfunc-
tion exists. When the malfunction
indicator is illumi nated, the sys-
tem may not be able to detect or
signal low tire pressure as
intended.
TPMS (tire pressure warning sys-
tem) malfunctions may occur for a
variety of reasons, including the
installation of replacement or
alternate tires or wheels on the
vehicle that prevent the TPMS
(tire pressure warning system)
from functioning properly. Always
check the TPMS (tire pressure
warning system) malfunction tell-
tale after replacing one or more
tires or wheels on your vehicle to
ensure that the replacement or
alternate tires and wheels allow
the TPMS (tire pressure warning
system) to continue to function
properly.
NOTICE
■To ensure the tire pressure
warning system operates
properly
Do not install tires with different
specifications or manufacturers
as the tire pressure warning sys-
tem may not operate properly.

5668-2. Steps to take in an emergency
The warning lights and warning buzzers operate as follows depend-
ing on the content of the message. If a message indicates the need
for inspection by a dealer, have the vehicle inspected by your Toyota
dealer immediately.
If a warning message
is displayed
The multi-information dis-
play shows warnings of sys-
tem malfunctions,
incorrectly performed oper-
ations, and messages that
indicate a need for mainte-
nance. When a message is
shown, perform the correc-
tion procedure appropriate
to the message.
If a warning message is dis-
played again after the appro-
priate actions have been
performed, contact your
Toyota dealer.
Messages and warnings

5678-2. Steps to take in an emergency
8
When trouble arises
*: A buzzer sounds the first time a message is shown on the multi-informa-tion display.
■Warning messages
The warning messages explained
below may differ from the actual
messages according to operation
conditions and vehicle specifica-
tions.
■If a message about an operation
is shown
●If a message about an operation
of the accelerator pedal or brake
pedal is shown
• A warning message about an
operation of the brake pedal may
be shown while the driving assist
systems such as PCS (Pre-Colli-
sion system) or the dynamic radar
cruise control is operating. If a
warning message is shown, be
sure to decelerate the vehicle or
follow an instruction shown on the
multi-informat ion display.
• A warning message is shown when Brake Override System
operates. (
P.240, 573)
• A warning message is shown when Drive-Start Control or Park-
ing Support Brake (if equipped)
(  P.245, 382) operates. Follow
the instructions on the multi-infor-
mation display.
●If a message about an operation
of the power switch is shown
An instruction for operation of the
power switch is shown when the
incorrect procedure for starting the
hybrid system is performed or the
power switch is operated incorrectly.
Follow the instructions shown on the
multi-information display to operate
the power switch again.
●If a message about a shift lever
operation is shown
Warning lightWarning
buzzer
*Warning
Sounds
 Indicates an important situation, such as
when a system related to driving is mal-
functioning or that danger may result if
the correction procedure is not per-
formed
 Indicates a situation, such as when dam-
age to the vehicle or danger may result
Comes on or
flashesSounds
Indicates an important situation, such as
when the systems shown on the multi-
information display ma y be malfunctioning
Does not
sound
 Indicates a condition, such as malfunc-
tion of electrical components, their con-
dition, or indicates the need for
maintenance
 Indicates a situation, such as when an
operation has been performed incor-
rectly, or indicates how to perform an
operation correctly