2021 Lexus GX460 check engine

5517-2. Steps to take in an emergency
GX460_OM_OM60T19U_(U)
7
When trouble arises
Start the engine of the second vehicle. Increase the engine speed slightly and
maintain at that level for approximatel y 5 minutes to recharge the battery of
your vehicle.
Open and close any of the doors of your vehicle with the engine switch off.
Maintain the engine speed of the second vehicle and start the engine of your
vehicle by turning the engine switch to IGNITION ON mode.
Once your vehicle’s engine has started, remove the jumper cables in the exact
reverse order in which they were connected.
Once the engine starts, have the vehicle checked at your Lexus dealer as soon
as possible.
■Starting the engine when the battery is discharged
The engine cannot be started by push-starting.
■To prevent battery discharge
●Turn off the headlights and the audio system while the engine is off.
●Turn off any unnecessary electrical components when the vehicle is running at a low
speed for an extended period , such as in heavy traffic.
■Charging the battery
The electricity stored in the battery will disc harge gradually even when the vehicle is not
in use, due to natural discharge and the draini ng effects of certain electrical appliances. If
the vehicle is left for a long time, the battery may discharge, and the engine may be
unable to start. (The battery recharges automatically during driving.)
■When recharging or replacing the battery
●In some cases, it may not be possible to un lock the doors using the smart access system
with push-button start when the battery is discharged. Use the wireless remote control
or the mechanical key to lock or unlock the doors.
●The engine may not start on the first attempt after the battery has recharged but will
start normally after the second attempt. This is not a malfunction.
●The engine switch mode is memorized by the vehicle. When the battery is recon-
nected, the system will return to the mode it was in before the battery was discharged.
Before disconnecting the battery, turn the engine switch off. If you are unsure what
mode the engine switch was in before the battery discharged, be especially careful
when reconnecting the battery.
4
5
6
7

5547-2. Steps to take in an emergency
GX460_OM_OM60T19U_(U)
The coolant level is satisfactory if it is between the “F” and “L” lines on the res-
ervoir.Reservoir
“F”
“L”
Radiator cap
Add coolant if necessary.
Water can be used in an emergency if
coolant is unavailable.
Start the engine and turn the air conditio ning system on to check that the radi-
ator cooling fans operate and to check for coolant leaks from the radiator or
hoses.
The fans operate when the air conditioning system is turned on immediately after a
cold start. Confirm that the fans are operating by checking the fan sound and air flow.
If it is difficult to check these, turn the air conditioning system on and off repeatedly.
(The fans may not operate in freezing temperatures.)
If the fans are not operating:
Stop the engine immediately an d contact your Lexus dealer.
If the fans are operating:
Have the vehicle inspected at the nearest Lexus dealer.
4
1
2
3
4
5
6
7

562
GX460_OM_OM60T19U_(U)8-1. Specifications
■Engine number
The engine number is stamped on
the engine block as shown.
*: The engine oil capacity is a reference quantity to be used when changing the engine
oil. Warm up and turn off the engine, wait more than 5 minutes, and check the oil level
on the dipstick.
Engine
Model4.6 L 8-cylinder (1UR-FE)
Type8-cylinder V type, 4-cycle, gasoline
Bore and stroke3.70  3.27 in. (94.0  83.0 mm)
Displacement281.2 cu.in. (4608 cm3)
Valve clearanceAutomatic adjustment
Drive belt tensionAutomatic adjustment
Fuel
Fuel typeUnleaded gasoline only
Octane rating91 (Research Octane Number 96) or higher
Fuel tank capacity (Reference)23.0 gal. (87 L, 19.1 Imp.gal.)
Lubrication system
Oil capacity
(Drain and refill — reference*)
With filter
Without filter8.2 qt. (7.8 L, 6.9 Imp.qt.)
7.8 qt. (7.4 L, 6.5 Imp.qt.)

GX460_OM_OM60T19U_(U)
5658-1. Specifications
8
Vehicle specifications
*: Your Lexus vehicle is filled with “Toyota Genuine Differential Gear Oil” at the factory.Use Lexus approved “Toyota Genuine Differ ential Gear Oil” or an equivalent of
matching quality to satisfy the above specification. Please contact your Lexus dealer
for further details.
*: Your Lexus vehicle is filled with “Toyota Genuine Differential Gear Oil” at the factory. Use Lexus approved “Toyota Genuine Differ ential Gear Oil” or an equivalent of
matching quality to satisfy the above specification. Please contact your Lexus dealer
for further details.
Electrical system (battery)
Specific gravity reading at
68 F (20 C):12.3 V or higher
In the case the voltage is less than standard,
charge battery.
(Voltage is checked 20 minutes after the engine)
Charging rates5 A max.
Front differential
Oil capacity1.48 qt. (1.40 L, 1.23 Imp.qt.)
Oil type and viscosity*Toyota Genuine Differential Gear Oil LT 75W-85
GL-5 or equivalent
Rear differential
Oil capacity2.85 qt. (2.70 L, 2.38 Imp.qt.)
Oil type and viscosity*Toyota Genuine Differential Gear Oil LT 75W-85
GL-5 or equivalent

610What to do if... (Troubleshooting)
GX460_OM_OM60T19U_(U)
What to do if... (Troubleshooting)
●If you lose your mechanical keys, ne w genuine mechanical keys can be made
by your Lexus dealer. ( P. 105)
●If you lose your electronic keys, the risk of vehicle theft increases significantly.
Contact your Lexus dealer immediately. ( P. 107)
●Is the electronic key battery weak or depleted? ( P. 492)
●Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off. (P. 201)
●Is the electronic key left inside the vehicle?
When locking the doors, make sure that you have the electronic key on your
person.
●The function may not operate properly du e to the condition of the radio wave.
( P. 127)
●Is the child-protector lock set?
The rear door cannot be opened from in side the vehicle when the lock is set.
Open the rear door from outside and then unlock the child-protector lock.
( P. 111)
If you have a problem, check the foll owing before contacting your Lexus
dealer.
The doors cannot be locked, unlocked, opened or closed
You lose your keys
The doors cannot be locked or unlocked
The rear door cannot be opened

617Alphabetical index
GX460_OM_OM60T19U_(U)
Emergency flashers .............................508
EngineAccessory mode................................. 201
Brake Override System .................. 169
Compartment..................................... 459
Drive-Start Control............................ 170
Hood ....................................................... 458
How to start the engine ................. 200
Identification number .......................562
If the engine will not start............... 545
Ignition switch (engine switch)... 200
Overheating ........................................ 553
Engine compartment cover ............. 460
Engine coolant....................................... 463 Capacity ................................................ 564
Checking................................................463
Preparing and checking before winter .................................... 374
Engine immobilizer system .................. 77
Engine oil ...................................................461 Capacity .................................................562
Checking................................................. 461
Preparing and checking before winter .................................... 374
Warning message .............................529
Engine oil maintenance data ........... 462
Engine switch .........................................200
Engine switch light ...............................400
Event data recorder (EDR) ...................10 Flat tire ........................................................ 531
Floor mats....................................................26
Fluid
Automatic transmission ..................566
Brake........................................................ 567
Steering ................................................. 568
Washer ..................................................... 471
Fog lights.................................................... 221 Replacing light bulbs ...................... 505
Switch ........................................................ 221
Four-wheel drive system....................344
Front passenger occupant classification system ............................ 47
Front passenger’s seat belt reminder light ..................................... 520
Front seats ................................................. 132 Adjustment.............................................. 132
Cleaning................................................. 445
Correct driving posture .................... 28
Driving position memory.................145
Head restraints .................................... 150
Seat heaters ..........................................398
Seat position memory .......................145
Front turn signal lights ............................211 Replacing light bulbs ........................ 501
Turn signal lever .....................................211
Wattage .................................................569F

623Alphabetical index
GX460_OM_OM60T19U_(U)
Crawl Control switch ..................... 348
Cruise control switch...................... 258
“DAC” switch.......................................352
Door lock switches .............................. 110
Driving position memory switches ................................................ 145
Emergency flashers switch .......... 508
Engine switch ...................................... 200
Fog light switch ..................................... 221
Four-wheel drive control switch....................................................344
Headlight cleaner switch ...............228
Height control switch.......................339
LDA (Lane Departure Alert) .......252
Light switches ........................................213
Moon roof switches........................... 163
Multi-terrain Monitor switch ........ 292
Multi-terrain Select switch............ 288
“ODO TRIP” button ..............................91
Outside rear view mirror switches ................................................ 157
Parking assist........................................270
Power door lock switch .................... 115
Power window switch ...................... 160
Rear window wiper and washer switch................................... 226
Rear window and outside rear view mirror
defoggers switch ........................... 389
Second start mode switch.............207
Seat heater switches........................ 398
Talk switch
*
Tilt and telescopic steering control switch .................................... 153 Vehicle-to-vehicle distance
switch ................................................... 264
VSC OFF switch ............................... 357
Window lock switch ......................... 160
Windshield wipers and washer switch ...................................222
Tachometer ............................................... 90
Tail lights .................................................... 213 Light switch............................................. 213
Replacing light bulbs ...................... 505
Talk switch
*
Telephone switch
*
Theft deterrent system Alarm ...........................................................79
Engine immobilizer system .............. 77
Tire inflation pressure......................... 484 Maintenance data............................. 568
Tire pressure warning system ..........473 Function .................................................. 473
Initializing ............................................... 473
Initializing procedures..................... 474
Installing tire pressure warning valves and transmitters................ 473
Registering ID codes ....................... 475
Warning light .......................................520
Tires ............................................................ 472 Chains ..................................................... 374
Checking ................................................472
If you have a flat tire ............................531
Inflation pressure................................ 484
Information............................................ 573
Replacing .................................................531
Rotating tires .........................................472
T
*: Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL” or “MULTIMEDIA OWNER’S MANUAL”.

624Alphabetical index
GX460_OM_OM60T19U_(U)
Size ........................................................... 568
Snow tires .............................................. 374
Spare tire ................................................. 531
Tire pressure warning system .................................................. 473
Tools........................................................... 532
Towing Dinghy towing ...................................... 199
Emergency towing............................. 512
Towing hooks ....................................... 513
Trailer Sway Control ....................... 356
Trailer towing .......................................... 181
Trailer Sway Control........................... 356
TRAC (Traction Control) ................. 355
Transmission Automatic transmission ................. 206
AVS switch ...........................................343
If the shift lever cannot be shifted from P .................................. 209
Trip meters ................................................. 90
Turn signal lights ...................................... 211 Replacing light bulbs..............................501, 502, 505
Turn signal lever .................................... 211
Wattage ................................................. 569
USB port
*
Vanity lights Vanity lights ........................................... 419
Wattage ................................................. 569
Vanity mirrors ..........................................419
Vehicle identification number ...........561
VSC (Vehicle Stability Control) .... 355 Warning buzzers ...................................518
Brake system ........................................ 518
Downshifting ........................................ 209
Intuitive parking assist.......................273
LDA (Lane Departure Alert).......250
Open back door....................................114
Open door ...............................................114
Pre-collision warning....................... 239
Radar cruise control ........................ 265
Seat belt remainder ..........................520
Warning lights .........................................518 ABS ............................................................519
Brake Override System ................... 521
Brake system ........................................ 518
Charging system ................................ 518
Drive-Start Cont rol ............................ 521
High coolant temperature ............. 518
KDSS..........................................................519
Low engine oil pressure ................. 518
Low fuel level .......................................520
Malfunction indicator lamp............ 518
Open door ...........................................520
Parking brake indicator ....................519
PCS ............................................................519
Seat belt reminder light ..................520
Slip indicator ..........................................519
SRS............................................................. 518
Tire pressure warning light ...........520
Warning message.................................527
Warning reflector holder.................... 410
Washer ......................................................222 Checking ................................................. 471
Preparing and checking before winter .................................... 374
Switch .......................................................222
Washing and waxing ...........................442
U
V
W