2018 Lexus GX460 check engine

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GX460_OM_OM60Q09U_(U)
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6-1. Maintenance and care Cleaning and protecting the vehicle exterior ................ 446
Cleaning and protecting the vehicle interior.................. 449
6-2. Maintenance Maintenance requirements ............................ 452
General mainte nance.............. 455
Emission inspection and maintenance (I/M)
programs.................................... 458
6-3. Do-it-yourself maintenance Do-it-yourself service precautions................................ 459
Hood ............................................... 462
Engine compartment ............... 463
Tires ................................................. 476
Tire inflation pressure .............. 483
Wheels ........................................... 487
Air conditioning filter ............... 489
Electronic key battery................491
Checking and replacing fuses.............................................. 493
Headlight aim .............................. 496
Light bulbs .................................... 498 7-1. Essential information
Emergency flashers ................... 510
If your vehicle has to be stopped in
an emergency ............................. 511
7-2. Steps to take in an emergency If your vehicle needs to be towed .................................512
If you think something is wrong............................................ 518
Fuel pump shut off system........519
If a warning light turns on or a warning buzzer
sounds ......................................... 520
If a warning message is displayed .................................... 528
If you have a flat tire .................. 542
If the engine will not start ........ 556
If the electronic key does not operate properly .............558
If the vehicle battery is discharged...................................561
If your vehicle overheats......... 564
If the vehicle becomes stuck ............................................. 567
6Maintenance and care7When trouble arises

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GX460_OM_OM60Q09U_(U)
For your information
Please note that this manual applies to all models and explains all equipment, including
options. Therefore, you may find some expl anations for equipment not installed on your
vehicle.
All specifications provided in this manual are current at the time of printing. However,
because of the Lexus policy of continual pr oduct improvement, we reserve the right to
make changes at any time without notice.
Depending on specifications, th e vehicle shown in the illustrations may differ from your
vehicle in terms of color and equipment.
Approximately five hours after the engine is turned off, you may hear sound coming from
under the vehicle for several minutes. This is the sound of a fuel evaporation leakage
check and, it does not indicate a malfunction.
A wide variety of non-genuine spare parts and accessories for Lexus vehicles are cur-
rently available in the market. You should kn ow that Toyota does not warrant these prod-
ucts and is not responsible fo r their performance, repair, or replacement, or for any
damage they may cause to, or adverse effect they may have on, your Lexus vehicle.
This vehicle should not be modified with non-genuine Lexus products. Modification with
non-genuine Lexus products could affect its performance, safety or durability, and may
even violate governmental regulations. In addition, damage or performance problems
resulting from the modification may not be covered under warranty.
The installation of a mobile two-way radio system in your vehicle could affect electronic
systems such as:
●Multiport fuel injection system/seque ntial multiport fuel injection system
●Dynamic radar cruise control system
●Cruise control system
●Anti-lock brake system
●SRS airbag system
●Seat belt pretensioner system
Be sure to check with your Lexus dealer for precautionary measures or special instruc-
tions regarding installation of a mobile two-way radio system.
Main Owner’s Manual
Noise from under vehicle after turning off the engine
Accessories, spare parts and modification of your Lexus
Installation of a mobile two-way radio system

15Pictorial index
GX460_OM_OM60Q09U_(U)
Windshield wipers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 213
Precautions against winter season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 377
To prevent freezing (windshield wiper de-icer
*) . . . . . . . . . . . . . . . . . . . . . . . . P. 391
Precautions against car wash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 447
Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 221
Refueling method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 221
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 572
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 476
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 578
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 37 7
Checking/rotation/tire pressure warning system . . . . . . . . . . . . . . . . . . . . . . P. 476
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 542
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 462
Opening. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 462
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 572
Coping with overheat. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 564
Camera*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P. 254, 264
Headlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 202
Parking lights/daytime running lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 202
Fog lights
* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 211
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 20 0
Stop/tail lights
Hill-start assist control*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 352
Downhill assist control system
*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 349
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 202
Back-up lights
Shifting the shift lever to R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 194
Side marker lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 202
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Light bulbs of the exte rior lights for driving
(Replacing method: P. 498, Watts: P. 579)
*: If equipped
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271-1. For safe use
GX460_OM_OM60Q09U_(U)
1
For safety and security
CAUTION
Observe the following precautions.
Failure to do so may cause the driver’s floor mat to slip, possibly interfering with the ped-
als while driving. An unexpectedly high spee d may result or it may become difficult to
stop the vehicle. This could lead to an ac cident, resulting in death or serious injury.
■When installing the driver’s floor mat
●Do not use floor mats designed for other models or different model year vehicles,
even if they are Lexus Genuine floor mats.
●Only use floor mats designed for the driver’s seat.
●Always install the floor mat securely using the retain ing hooks (clips) provided.
●Do not use two or more floor mats on top of each other.
●Do not place the floor mat bottom-side up or upside-down.
■Before driving
●Check that the floor mat is securely fixed in
the correct place with all the provided retain-
ing hooks (clips). Be especially careful to per-
form this check after cleaning the floor.
●With the engine stopped and the shift lever in
P, fully depress each pedal to the floor to
make sure it does not interfere with the floor
mat.

711-1. For safe use
GX460_OM_OM60Q09U_(U)
1
For safety and security
Exhaust gas precautions
Harmful substance to the human body is included in exhaust gases if inhaled.
CAUTION
Exhaust gases include harmful carbon monoxi de (CO), which is colorless and odorless.
Observe the following precautions.
Failure to do so may cause exhaust gases enter the vehicle and may lead to an accident
caused by light-headedness, or may lead to death or a serious health hazard.
■Important points while driving
●Keep the back door closed.
●If you smell exhaust gases in the vehicle even when the back door is closed, open the
windows and have the vehicle inspected at your Lexus dealer as soon as possible.
■When parking
●If the vehicle is in a poorly ventilated area or a closed area, such as a garage, stop the
engine.
●Do not leave the vehicle with the engine running for a long time.
If such a situation cannot be avoided, park the vehicle in an open space and ensure
that exhaust fumes do not enter the vehicle interior.
●Do not leave the engine running in an area with snow build-up, or where it is snowing.
If snowbanks build up around the vehicle while the engine is running, exhaust gases
may collect and enter the vehicle.
■Exhaust pipe
The exhaust system needs to be checked periodically. If there is a hole or crack caused
by corrosion, damage to a joint or abnormal exhaust noise, be sure to have the vehicle
inspected and repaired by your Lexus dealer.

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GX460_OM_OM60Q09U_(U)2. Instrument cluster
*1: These lights turn on when the engine switch is turned to IGNITION ON mode to
indicate that a system check is being perfor med. They will turn off after the engine is
on, or after a few seconds. There may be a ma lfunction in a system if the lights do not
turn on, or turn off. Have the vehi cle inspected by your Lexus dealer.
*2: The light flashes to indicate a malfunction.
The indicators inform the driver of the op erating state of the vehicle’s various sys-
tems.
Indicators
Turn signal indicator
( → P. 200) “SET” indicator
(
→ P. 225, 228)
(U.S.A.)
Headlight indicator
(→ P. 202)
(if equipped)
Dynamic radar cruise
control indicator
(→ P. 228)
(Canada)
Tail light indicator
(→ P. 202)
(if equipped)
“LDA” (Lane Departure
Alert) indicator ( →P. 239)
Headlight high beam
indicator ( →P. 203)
*1, 2
Slip indicator ( →P. 352)
(if equipped)
Automatic High Beam
indicator ( →P. 206)*1VSC OFF indicator
(→ P. 353)
(if equipped)
Fog light indicator
(→ P. 211)
(if equipped)
Multi-terrain Select
indicator ( →P. 308)
*1
Eco Driving Indicator
Light ( →P. 90)
*1
(if equipped)
Crawl Control indicator
(→ P. 346)
Cruise control indicator
( → P. 225, 228)
*1
(if equipped)
Downhill assist control
system indicator
(→ P. 349)

GX460_OM_OM60Q09U_(U)
812. Instrument cluster
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Instrument cluster
*1: These lights turn on when the engine switch is turned to IGNITION ON mode toindicate that a system check is being perfor med. They will turn off after the engine is
on, or after a few seconds. There may be a ma lfunction in a system if the lights do not
turn on, or turn off. Have the vehi cle inspected by your Lexus dealer.
*2: The light flashes to indicate that the system is operating.
*3: The light turns on when the system is turn ed off. The light flashes quickly to indicate
that the system is operating.
*4: In order to confirm operation, the BSM outside rear view mirror indicators illumi- nate in the following situations:
• When the engine switch is turned to IGNITION ON mode while the system is set to on.
• When the system is set to on while the engine switch is in IGNITION ON mode.
If the system is functioning correctly, th e BSM outside rear view mirror indicators
will turn off after a few seconds.
If the BSM outside rear view mirror indicators do not illuminate or do not turn off,
there may be a malfunction with the system.
If this occurs, have the vehicle inspected by your Lexus dealer.
*5: This light illuminates on the outside rear view mirrors.
*6: This light illuminates on the center panel.“2nd STRT” indicator
(
→ P. 195)
(if equipped)
“BSM” (Blind Spot
Monitor) indicator
(→ P. 357)
Low speed four-wheel
drive indicator light
( → P. 342)
*4, 5
(if equipped)
BSM (Blind Spot Monitor)
outside rear view mirror
indicators ( →P. 357)
Center differential lock
indicator ( →P. 343)
*1, 6
(U.S.A.)
“AIR BAG ON/
OFF” indicator
(→ P. 48)
(if equipped)
Intuitive parking assist
indicator ( →P. 245)*1, 6
(Canada)
“AIR BAG ON/
OFF” indicator
(→ P. 48)
*1, 3
(if equipped)
“PCS” warning light
(→ P. 368)

GX460_OM_OM60Q09U_(U)
852. Instrument cluster
2
Instrument cluster
■The meters and display illuminate when
The engine switch is in IGNITION ON mode.
■Instrument cluster brightness adjustment
The instrument cluster brightness levels when the tail lights are on and off can be
adjusted.
■The brightness of the in strument cluster lights
When the tail lights are on, the brightness will change. Ho wever, when the surroundings
are bright (daytime, etc.) turn ing on the tail lights will not change the instrument cluster
brightness.
In addition, the brightness of the instrument cluster lights is automatically adjusted based
on the light sensor detecting ho w bright the surroundings are.
■When disconnecting and reconnecting battery terminals
The trip meter data will be reset.
If the trip meter was displayed last, the od ometer will be displayed after resetting.
■Customization
Setting of sensitivity of the ambient light sensor used for dimming the meter lights can be
changed. (Customizable features: →P. 594)
NOTICE
■To prevent damage to the engine and its components
●Do not let the indicator needle of the tachometer enter the red zone, which indicates
the maximum engine speed.
●The engine may be overheating if the engine coolant temperature gauge is in the red
zone (H). In this case, immediately stop the vehicle in a safe place, and check the
engine after it has cooled completely. (→ P. 564)