2019 Lexus GS350 check engine

5147-2. Steps to take in an emergency
GS350_300_OM_OM30G96U_(U)
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.
5
GS350GS F
GS300
6
7

526
GS350_300_OM_OM30G96U_(U)8-1. Specifications
GS350/GS300
*: 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 oil selection
“Toyota Genuine Motor Oil” is used in your Lexus vehicle. Use Lexus
approved “Toyota Genuine Motor Oil” or equivalent to satisfy the following
grade and viscosity.
Oil grade: ILSAC GF-5 multigrade engine oil
Lubrication system
GS350GS3002WDAWD
Oil capacity
(Drain and refill 
reference
*)
With filter
Without filter
6.0 qt.
(5.7 L, 5.0 Imp.qt.)
5.8 qt.
(5.5 L, 4.8 Imp.qt.)6.8 qt.
(6.4 L, 5.6 Imp.qt.)
6.3 qt.
(6.0 L, 5.3 Imp.qt.)4.9 qt.
(4.6 L, 4.0 Imp.qt.)
4.5 qt.
(4.3 L, 3.8 Imp.qt.)

GS350_300_OM_OM30G96U_(U)
5278-1. Specifications
8
Vehicle specifications
Recommended viscosity: SAE 0W-20
SAE 0W-20 is the best choice for
good fuel economy and good start-
ing in cold weather.
If SAE 0W-20 is not available, SAE
5W-20 oil may be used. However, it
must be replaced with SAE 0W-20
at the next oil change.
Oil viscosity (0W-20 is explained here as an example):• The 0W in 0W-20 indicates the characteristic of the oil which allows cold startability. Oils with a lower value be fore the W allow for easier starting of
the engine in cold weather.
• The 20 in 0W-20 indicates the viscos ity characteristic of the oil when the
oil is at high temperature. An oil with a higher viscosity (one with a higher
value) may be better suited if the vehicle is operated at high speeds, or
under extreme lo ad conditions.
How to read oil container label:
The International Lubricant Specifi-
cation Advisory Committee
(ILSAC) Certification Mark is added
to some oil containers to help you
select the oil you should use.
GS F
*: 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.
Outside temperature
Oil capacity
(Drain and refill — reference*)
With filter
Without filter9.3 qt. (8.8 L, 7.7 Imp.qt.)
8.3 qt. (7.9 L, 7.0 Imp.qt.)

530
GS350_300_OM_OM30G96U_(U)8-1. Specifications
*: The fluid capacity is the quantity of reference.
If replacement is necessary, contact your Lexus dealer.
Electrical system
Battery
Open voltage at 68 F (20 C):12.3 V or higher
(Voltage is checked 20 minutes after the engine
and all lights are turned off.)
Charging rates5 A
Automatic transmission
Fluid capacity*
GS350 (2WD)10.0 qt. (9.5 L, 8.4 Imp.qt.)
GS350 (AWD)10.6 qt. (10.0 L, 8.8 Imp.qt.)
GS3009.2 qt. (8.7 L, 7.7 Imp.qt.)
GS F11.8 qt. (11.2 L, 9.9 Imp.qt.)
Fluid typeToyota Genuine ATF WS
NOTICE
■Automatic transmission fluid type
Using transmission fluid other than “Toyota Genuine ATF WS” may cause deterioration
in shift quality, locking up of your transm ission accompanied by vibration, and ulti-
mately damage the transmission of your vehicle.
Front differential (AWD models)
Oil capacity0.74 qt. (0.70 L, 0.62 Imp.qt.)
Oil type and viscosityToyota Genuine Differential gear oil GL-5 or equivalent
Above 0 F (-18 C): SAE90
Below 0 F (-18 C): SAE80W or SAE80W-90

580What to do if... (Troubleshooting)
GS350_300_OM_OM30G96U_(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. 140)
●If you lose your electronic keys, the risk of vehicle theft increases significantly.
Contact your Lexus dealer immediately. ( P. 141)
●Is the electronic key battery weak or depleted? ( P. 412)
●Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off. (P. 204)
●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. 158)
●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. 146)
●The function to prevent the electronic key from being left inside the trunk will
operate and you can open th e trunk as usual. Take the key out from the trunk.
( P. 151)
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
The trunk lid is closed with the electronic key left inside

582What to do if... (Troubleshooting)
GS350_300_OM_OM30G96U_(U)
●The seat belt reminder light is flashing
Are the driver and the front passe nger wearing the seat belts? (P. 439)
●The parking brake indicator is on
Is the parking brake released? ( P. 217)
Depending on the situation, other types of warning buzzer may also sound.
( P. 437, 444)
●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. ( P. 79)
To stop the alarm, turn the engine switch to IGNITION ON mode or start the
engine.
●Is the electronic key left inside the vehicle or the moon roof opened?
Check the message on the multi-information display. ( P. 444)
●When a warning light turns on or a warning message is displayed, refer to
P. 437, 444.A warning buzzer sounds during driving
An alarm is activated and the horn sounds
A warning buzzer sounds when leaving the vehicle
A warning light turns on or a warning message is displayed

588Alphabetical index
GS350_300_OM_OM30G96U_(U)
Eco drive mode ...................................... 281
Eco Driving Indicator...............................91
Eco driving meter .................................... 98
EDR (Event data recorder) ...................10
Electric Power Steering (EPS) ....... 297Function .................................................. 297
Warning light ...................................... 438
Warning message ............................. 444
Electronic key ......................................... 138 Battery-saving function .................... 158
If the electronic key does not operate properly............................ 504
Replacing the battery .........................412
Emergency, in case of If a warning buzzer sounds........... 437
If a warning light turns on............... 437
If a warning message is displayed ........................................ 444
If the electronic key does not operate properly ....... 504
If the engine will not start............... 500
If the vehicle is trapped in rising water ........................................428
If the parking brake cannot be released ....................... 502
If the vehicle battery is discharged ........................................ 507
If you have a flat tire ............. 475, 486
If you think something is wrong...............................................435
If your vehicle becomes stuck ...... 518
If your vehicle has to be stopped in an emergency ............................. 427
If your vehicle needs to be towed .......................................429
If your vehicle overheats ................. 512 Emergency flashers .............................426
Emergency tire puncture repair
kit ............................................................. 486
Engine Accessory mode ............................... 204
Compartment ..................................... 378
Engine switch ...................................... 203
Hood........................................................ 375
How to start the engine.................. 203
Identification number....................... 524
Ignition switch (engine switch.................................. 203
Overheating........................................... 512
Engine compartment cover...............381
Engine coolant ...................................... 388 Capacity................................................. 529
Checking .............................................. 388
Preparing and checking before winter ....................................304
Engine coolant temperature gauge .............................................. 92, 100
Engine immobilizer system .................. 77
Engine oil ................................................. 383 Capacity................................................. 526
Checking ...............................................383
Oil level warning message ........... 444
Oil pressure warning message........................... 444
Preparing and checking before winter ....................................304
E

599Alphabetical index
GS350_300_OM_OM30G96U_(U)
Tachometer .....................................93, 100Variable red zone............................... 103
Tail lights................................................... 222 Light switch ........................................... 222
Replacing light bulbs ........................ 422
Welcome light illumination control ................................................... 144
Talk switch
*
Telephone switches*
Theft deterrent system Alarm........................................................... 79
Engine immobilizer system.............. 77
Tire inflation pressure ......................... 532 Maintenance data ..............................532
Tire inflation pressure display function ............................................... 396
Warning light .......................................439
Warning message ............................. 444
Tire information ..................................... 539 Glossary .................................................544
Size ............................................................. 541
Tire identification number............... 541
Uniform Tire Quality Grading...............................................543
Tire pressure warning system ......... 396 Function ................................................. 396
Initializing................................................397
Installing tire pressure warning valves and transmitters ............... 396
Registering ID codes ...................... 398
Warning light .......................................439
Warning message ............................. 444 Tires ........................................................... 395
Chains .....................................................306
Checking ...............................................395
Emergency tire puncture repair kit ..............................................486
If you have a flat tire ..............475, 486
Inflation pressure................................ 532
Information............................................539
Replacing ............................................... 475
Rotating tires ........................................ 396
Size ........................................................... 532
Snow tires ............................................. 308
Spare tire................................................ 475
Tire inflation pressure display function................................................ 396
Tire pressure warning system ..... 396
Warning light ....................................... 439
Warning message............................. 444
Tools ........................................................... 476
Top tether strap ....................................... 68
Torque Vectoring Differential (TVD) ......................................................294
Total load capacity............................... 200
Towing Dinghy towing ..................................... 202
Emergency towing ........................... 429
Towing eyelet ........................................ 431
Trailer towing.........................................201
TRAC (Traction Control) Function .................................................. 296
TRAC OFF switch ............................298
T
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.