2019 LEXUS UX250H check engine

4TABLE OF CONTENTS
Compass...........................................317
6-1. Maintenance and care Cleaning and protecting the vehi-cle exterior ................................... 322
Cleaning and protecting the vehi- cle interior .................................... 325
6-2. Maintenance Maintenance requirements ..... 328
General maintenance ................ 329
Emission inspection and mainte- nance (I/M) programs ............. 331
6-3. Do-it-yourself maintenance Do-it-yourself service precautions........................................................... 333
Hood.................................................. 335
Positioning a floor jack............... 336
Engine compartment.................. 337
12-volt battery................................ 342
Tires ................................................... 345
Replacing the tire ......................... 355
Tire inflation pressure .................. 361
Wheels.............................................. 363
Air conditioning filter..................364
Cleaning the hybrid battery (trac- tion battery) air intake vent and fil-
ter..................................................... 365
Electronic key battery ................ 368
Checking and replacing fuses 370
Headlight aim................................. 372
Light bulbs ....................................... 3747-1. Essential information
Emergency flashers .................... 378
If your vehicle has to be stopped in an emergency ............................ 378
If the vehicle is trapped in rising water .............................................. 379
7-2. Steps to take in an emergency If your vehicle needs to be towed........................................................... 381
If you think something is wrong .......................................................... 385
If a warning light turns on or a warn- ing buzzer sounds..................... 386
If a warning messa ge is displayed
.......................................................... 395
If you have a flat tire .................... 399
If the hybrid syst em will not start
.......................................................... 400
If you lose your keys.................... 402
If the fuel filler door cannot be opened .......................................... 402
If the electronic key does not oper- ate properly ................................. 403
If the 12-volt battery is discharged .......................................................... 405
If your vehicle overheats ............ 410
If the vehicle becomes stuck ..... 413
8-1. Specifications Maintenance data (fuel, oil level, etc.) .................................................. 416
Fuel information............................ 423
Tire inform

ation ............................ 425
6Maintenance and care
7When trouble arises
8Vehicle specifications

7
late governmental regulations. In addi-
tion, damage or performance
problems resulting from the modifica-
tion may not be covered under war-
ranty.
The installation of a mobile two-way
radio system in your vehicle could
affect electronic systems such as:
 Hybrid system
 Multiport fuel injection sys-
tem/sequential multiport fuel injec-
tion system
 Lexus Safety System+2.0
 Anti-lock brake system
 SRS airbag system
 Seat belt pretensioner system
Be sure to check with your Lexus
dealer for precautionary measures or
special instructions regarding installa-
tion of a mobile two-way radio system.
High voltage parts and cables on the
hybrid vehicles emit approximately the
same amount of electromagnetic
waves as the conventional gasoline
powered vehicles or home electronic
appliances despite of their electro-
magnetic shielding.
Unwanted noise may occur in the
reception of the mobile two-way radio.
The vehicle is equipped with sophisti- cated computers that will record cer-
tain data, such as:
The recorded data varies according to
the vehicle grade level and options
with which it is equipped.
These computers do not record con-
versations or sounds, and only record
images outside of the vehicle in certain
situations.
• Engine speed/Elect
ric motor speed
(traction motor speed)
• Accelerator status
•Brake status
• Vehicle speed
• Operation status of the driving assist systems, such as the ABS and
pre-collision system
• Images from the front camera (avail- able only when certain safety sys-
tems are activated, which varies
depending on the vehicle specifica-
tions).
 Data Transmission
Your vehicle may transmit the data
recorded in these computers to Lexus
without notification to you.
Data usage
Lexus may use the data recorded in this
computer to diagnose malfunctions, con-
duct research and development, and
improve quality.
Lexus will not disclose the recorded data to
a third party except:
• With the consent of the vehicle owner or
with the consent of the lessee if the vehi-
cle is leased
• In response to an official request by the police, a court of law or a government
agency
Installation of a mobile two-way
radio system
Vehicle data recording

13Pictorial index
Windshield wipers ..................................................................................................P.184
Precautions against winter season ............................................................................ P.263
To prevent freezing (windshield wiper de-icer)
*.................................................. P.281
Precautions against car wash (r ain-sensing windshield wipers)
*................. P.323
Fuel filler door ..........................................................................................................P.190
Refueling method .............................................................................................................. P .190
Fuel type/fuel tank capacity ......... ..................................................................................P.417
Tires.......................................................................................................................... ..P.345
Tire size/inflation pressure ........................................................................................... P.422
Winter tires/tire chain .................................................................................................... P.26 3
Checking/rotation/tire pressure warning system.............................................. P.345
Coping with flat tires........................................................................................................ P .399
Hood ......................................................................................................................... P. 335
Opening ........................................................................................................................ .......P.335
Engine oil ..................................................................................................................... .......... P.418
Coping with overheat ...................................................................................................... P.410
Warning messages ..........................................................................................................P.395
Headlights ................................................................................................................. P.17 7
Parking lights/daytime running lights............................................................... P.177
Fog lights
*..................................................................................................................P.183
Cornering lights
*..................................................................................................... P.179
Turn signal lights ....................................................................................................... P.171
Tail lights/stop lights............................................................................................... P.177
Stop lights
License plate lights ................................................................................................. P.177
Back-up lights
Shifting the shift lever to R ...............................................................................................P.1 67
Light bulbs of the exterior lights for driving
(Replacing method: P.374, Watts: P.422)
D
E
F
G
H
I
J
K
L
M
N
O
P

802-1. Instrument cluster
( P.435)
■Display items
 Odometer
Displays the total distance the vehicle has
been driven.
Trip meter A/trip meter B
Displays the distance the vehicle has been
driven since the meter was last reset. Trip
meters A and B can be used to record and display different distances independently.

Distance until next engine oil
change
Displays the distance the vehicle can be
driven until an oil change is necessary.
■Changing the display
Each time the “ODO TRIP” switch is
pressed, the displayed item will be
changed. When the trip meter is dis-
played, pressing and holding the switch
will reset the trip meter.
■Pop-up display
Distance until the next engine oil
change will displayed when a warning
message indicating that oil mainte-
nance should be performed soon or is
required is displayed.
The brightness of the instrument panel
lights can be adjusted.
WARNING
■The information display at low tem-
peratures
Allow the interior of the vehicle to warm
up before using the liquid crystal infor-
mation display. At extremely low tem-
peratures, the information display
monitor may respond slowly, and display
changes may be delayed.
For example, there is a lag between the
driver’s shifting and the new gear number
appearing on the display. This lag could
cause the driver to downshift again,
causing rapid and excessive engine brak-
ing and possibly an accident resulting in
death or injury.
NOTICE
■To prevent damage to the engine and
its components
●Do not let the indicator of the tachom-
eter enter the red zone, which indi-
cates the maximum engine speed.
●The engine may be overheating if the
engine coolant temperature gauge is
in the red zone (H). In this case, imme-
diately stop the vehicle in a safe place,
and check the engine after it has
cooled completely. ( P.410)
Odometer and trip meter dis-
playChanging the instrument panel
light brightness

852-1. Instrument cluster
2
Vehicle status information and indicators
■Engine speed
On hybrid vehicles, engine speed is pre-
cisely controlled in order to help improve
fuel efficiency and reduce exhaust emis-
sions etc.
There are times when the engine speed that
is displayed may differ even when vehicle
operation and driving conditions are the
same.
■Hybrid System Indicator is displayed
when
The Hybrid System Indicator is displayed in
the following situations:
●The shift lever is in D or S.
●The driving mode is other than Sport
mode.
■Outside temperature display
●In the following situations, the correct
outside temperature may not be dis-
played, or the display may take longer
than normal to change:
• When stopped, or driving at low speeds (less than 12 mph [20 km/h])
• When the outside temperature has changed suddenly (at the entrance/exit of
a garage, tunnel, etc.)
●When “--” or “E” is displayed, the system
may be malfunctioning. Take your vehicle
to your Lexus dealer.
■Speed unit setting for the speedometer
When the speed unit has been changed
from the default setting, the vehicle speed in
the default unit is also displayed in the
meter.
■Liquid crystal display
 P.88
■Customization
The gauges and meters can be customized
on of the multi-information display.
(  P.435)
WARNING
■The information display at low tem-
peratures
Allow the interior of the vehicle to warm
up before using the liquid crystal infor-
mation display. At extremely low tem-
peratures, the information display
monitor may respond slowly, and display
changes may be delayed.
For example, there is a lag between the
driver’s shifting and the new gear number
appearing on the display. This lag could
cause the driver to downshift again,
causing rapid and excessive engine brak-
ing and possibly an accident resulting in
death or injury.
NOTICE
■To prevent damage to the engine and
its components
●Do not let the indicator of the tachom-
eter enter the red zone, which indi-
cates the maximum engine speed.
●The engine may be overheating if the
engine coolant temperature gauge is
in the red zone (H). In this case, imme-
diately stop the vehicle in a safe place,
and check the engine after it has
cooled completely. ( P.410)

1544-1. Before driving
WARNING
●During normal driving, do not turn off
the hybrid system. Turning the hybrid
system off while driving will not cause
loss of steering or braking control,
however, power assist to the steering
will be lost. This will make it more diffi-
cult to steer smoothly, so you should
pull over and stop the vehicle as soon
as it is safe to do so.
In the event of an emergency, such as if
it becomes impossible to stop the vehi-
cle in the normal way: P.378
●Use engine braking (downshift) to
maintain a safe speed when driving
down a steep hill.
Using the brakes continuously may
cause the brakes to overheat and lose
effectiveness. ( P.167)
●Do not adjust the positions of the
steering wheel, the seat, or the inside
or outside rear view mirrors while driv-
ing.
Doing so may result in a loss of vehicle
control.
●Always check that all passengers’
arms, heads or other parts of their
body are not outside the vehicle.
●AWD models: Do not drive the vehicle
off-road.
This is not an AWD vehicle designed
for off-road driving. Proceed with all
due caution if it becomes unavoidable
to drive off-road.
●Do not drive across a river or through
other bodies of water.
This may cause electric/electronic
components to short circuit, damage
the hybrid system or cause other seri-
ous damage to the vehicle.
●Do not drive in excess of the speed
limit. Even if the legal speed limit per-
mits it, do not drive over 85 mph (140
km/h) unless your vehicle has high-
speed capability tires.
Driving over 85 mph (140 km/h) may
result in tire failure, loss of control and
possible injury. Be sure to consult a tire
dealer to determine whether the tires
on your vehicle are high-speed capa-
bility tires or not befo re driving at such
speeds.
■When driving on slippery road sur-
faces
●Sudden braking, acceleration and
steering may cause tire slippage and
reduce your ability to control the vehi-
cle.
●Sudden acceleration, engine braking
due to shifting, or changes in engine
speed could cause the vehicle to skid,
resulting in an accident.
●After driving through a puddle, lightly
depress the brake pedal to make sure
that the brakes are functioning prop-
erly. Wet brake pads may prevent the
brakes from functioning properly. If the
brakes on only one side are wet and
not functioning properly, steering con-
trol may be affected.
■When shifting the shift lever
●Do not let the vehicle roll backward
while the shift lever is in a driving posi-
tion, or roll forward while the shift lever
is in R.
Doing so may result in an accident or
damage to the vehicle.
●Do not shift the shif t lever to P while
the vehicle is moving.
Doing so can damage the hybrid trans-
mission and may result in a loss of vehi-
cle control.
●Do not shift the shift lever to R while
the vehicle is moving forward.
Doing so can damage the hybrid trans-
mission and may result in a loss of vehi-
cle control.

1554-1. Before driving
4
Driving
WARNING
●Do not shift the shift lever to a driving
position while the vehicle is moving
backward.
Doing so can damage the hybrid trans-
mission and may result in a loss of vehi-
cle control.
●Shifting the shift lever to N while the
vehicle is moving will disengage the
hybrid system. Engine braking is not
available with the hybrid system disen-
gaged.
●Be careful not to shift the shift lever
with the accelerator pedal depressed.
Shifting the shift lever to any position
other than P or N may lead to unex-
pected rapid acceleration of the vehi-
cle that may cause an accident and
result in death or serious injury.
■If you hear a squealing or scraping
noise (brake pad wear limit indica-
tors)
Have the brake pads checked and
replaced by your Lexus dealer as soon as
possible. Rotor damage may result if the
pads are not replaced when needed.
It is dangerous to drive the vehicle when
the wear limits of the brake pads and/or
those of the brake discs are exceeded.
■When the vehicle is stopped
●Do not depress the accelerator pedal
unnecessarily.
If the shift lever is in any position other
than P or N, the vehicle may acceler-
ate suddenly and unexpectedly, caus-
ing an accident.
●In order to prevent accidents due to
the vehicle rolling away, always keep
depressing the brake pedal while
stopped with the “READY” indicator is
illuminated, and apply the parking
brake as necessary.
●If the vehicle is stopped on an incline,
in order to prevent accidents caused
by the vehicle rolling forward or back-
ward, always depress the brake pedal
and securely apply the parking brake
as needed.
●Avoid revving or racing the engine.
Running the engine at high speed
while the vehicle is stopped may cause
the exhaust system to overheat, which
could result in a fire if combustible
material is nearby.
■When the vehicle is parked
●Do not leave glasses, cigarette lighters,
spray cans, or soft drink cans in the
vehicle when it is in the sun.
Doing so may result in the following:
• Gas may leak from a cigarette lighter or spray can, and may lead to a fire.
• The temperature inside the vehicle may cause the plastic lenses and plas-
tic material of glasses to deform or
crack.
• Soft drink cans may fracture, causing the contents to spray over the interior
of the vehicle, and may also cause a
short circuit in the vehicle’s electrical
components.
●Do not leave cigarette lighters in the
vehicle. If a cigare tte lighter is in a
place such as the glove box or on the
floor, it may be lit accidentally when
luggage is loaded or the seat is
adjusted, causing a fire.
●Do not attach adhesive discs to the
windshield or windows. Do not place
containers such as air fresheners on
the instrument panel or dashboard.
Adhesive discs or containers may act
as lenses, causing a fire in the vehicle.
●Do not leave a door or window open if
the curved glass is coated with a met-
allized film such as a silver-colored
one. Reflected sunlight may cause the
glass to act as a lens, causing a fire.

1574-1. Before driving
4
Driving
NOTICE
●The vehicle will make abnormal
sounds or vibrations.
●The vehicle will lean abnormally.
Information on what to do in case of a flat
tire ( P.399)
■When encountering flooded roads
Do not drive on a road that has flooded
after heavy rain, etc. Doing so may cause
the following serious damage to the vehi-
cle:
●Engine stalling
●Short in electrical components
●Engine damage caused by water
immersion
In the event that you drive on a flooded
road and the vehicle is flooded, be sure
to have your Lexus dealer check the fol-
lowing:
●Brake function
●Changes in quantity and quality of oil
and fluid used for the engine, hybrid
transmission, etc.
●Lubricant condition for the bearings
and suspension joints (where possi-
ble), and the function of all joints, bear-
ings, etc.
■When parking the vehicle
Always set the parking brake, and shift
the shift lever to P. Failure to do so may
cause the vehicle to move or the vehicle
may accelerate sudden ly if the accelera-
tor pedal is accidentally depressed.
Cargo and luggage
Take notice of the following infor-
mation about storage precautions,
cargo capacity and load:
WARNING
■Things that must not be carried in the
luggage compartment
The following things may cause a fire if
loaded in the luggage compartment:
●Receptacles containing gasoline
●Aerosol cans
■Storage precautions
Observe the following precautions.
Failure to do so may prevent the pedals
from being depressed properly, may
block the driver’s vision, or may result in
items hitting the driver or passengers,
possibly causing an accident.
●Stow cargo and luggage in the lug-
gage compartment whenever possi-
ble.
●Do not stack cargo and luggage in the
luggage compartment higher than the
seatbacks.
●When you fold down the rear seats,
long items should not be placed
directly behind the front seats.
●Never allow anyone to ride in the lug-
gage compartment. It is not designed
for passengers. They should ride in
their seats with thei r seat belts prop-
erly fastened.