2015 Lexus IS250 check engine light

4788-2. Steps to take in an emergency
IS350/250_U (OM53C50U)
(If equipped)
Indicates that the windows and the moon roof are not
fully closed (with the engine switch off, and the driver’s
door open)A buzzer also sounds.
 Close all the windows and the moon roof.
Indicates a malfunction in the brake override system
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.
Indicates that engine oil level is low
A buzzer also sounds.
 Check the level of engine oil, and add if necessary.
Indicates a malfunction in:
• The automatic headlig ht leveling system; or
• The Automatic High Beam system (if equipped)
• The LED headlight system (if equipped)
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.
Indicates that the accelerator and brake pedal are being
depressed simultaneously
Release the accelerator or brake pedal.
Indicates that the tire in flation pressure is low
 Check the tire inflation pressure, and adjust to the
appropriate level.
Wa r n i n g m e s s a g eDetails/Actions
(Flashes)
(Flashes)

5169-1. Specifications
IS350/250_U (OM53C50U)
■Spark plug
Cooling system
IS250IS350
Capacity 11.1 qt. (10.5 L, 9.2 Imp. qt.) 9.8 qt. (9.3 L, 8.2 Imp. qt.)
Coolant type
Use either of the following:
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based non-silicate,
non-amine, non-nitrite, and non-borate coolant with long-
life hybrid organic acid technology
Do not use plain water alone.
Ignition system
Make DENSO FK20HBR11
Gap0.043 in. (1.1 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.
Electrical system
Battery
Open voltage at 68F
(20 C):12.6  12.8 V Fully charged
12.2
 12.4 V Half charged
11.8
 12.0 V Discharged
(Check the voltage 20 minutes after the engine and all
lights are turned off.)
Charging rates5 A max.

562What to do if... (Troubleshooting)
IS350/250_U (OM53C50U)
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts? ( P. 4 6 7 )
●The parking brake indicator is on
Is the parking brake released? ( P. 1 7 2 )
Depending on the situation, other type s of warning buzzer may also sound.
( P. 466, 472)

●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. ( P. 7 1 )
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. 4 7 2 )
●When a warning light turns on or a warning message is displayed, refer to
P. 4 6 6 , 4 7 2 . 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

570Alphabetical index
IS350/250_U (OM53C50U)
Emergency flashers ............................. 456
Engine .........................................................514ACCESSORY mode....................... 160
Compartment....................................... 413
Engine switch ........................................ 159
Hood ........................................................... 411
How to start the engine ................... 159
Identification number ........................ 513
If the engine will not start............... 496
Ignition switch (engine switch)..... 159
Overheating ........................................ 506
Engine coolant......................................... 417 Capacity .................................................. 516
Checking..................................................417
Preparing and checking before winter ................................... 260
Engine coolant temperature gauge ..........................................................81
Engine immobilizer system ................. 69
Engine oil ...................................................414 Capacity .................................................. 514
Checking................................................. 414
Preparing and checking before winter ................................... 260
Engine switch .......................................... 159
Enhanced VSC ..................................... 240
EPS (Electronic Power Steering) ..........241 Function ....................................................241
Warning light ....................................... 467
Event data recorder (EDR) ...................10 First-aid kit storage belt......................374
Flat tire ...................................................... 486
Floor mats....................................................26
Fluid
Automatic transmission .................... 517
Brake......................................................... 518
Washer ................................................... 422
Fog lights..................................................... 181 Replacing light bulbs ....................... 452
Switch ......................................................... 181
Wattage ................................................... 521
Footwell light .......................................... 368 Wattage ................................................... 521
Front passenger occupant classification system ............................ 47
Front personal lights ........................... 369 Wattage ................................................... 521
Front seats ................................................. 120 Adjustment..............................................120
Cleaning................................................. 399
Correct driving posture .................... 28
Driving position memory................. 123
Head restraints .....................................128
Power easy access system ............. 123
Seat heaters .......................................... 367
Seat position memory ....................... 123
Seat ventilators.................................... 367F

580Alphabetical index
IS350/250_U (OM53C50U)
Tachometer .................................................81
Tail lights..................................................... 173Light switch .............................................173
Replacing light bulbs ........................452
Talk switch
*............................................ 329
Telephone switches
*.......................... 329
Theft deterrent system Alarm............................................................. 71
Engine immobilizer system..............69
Luggage security system .................. 110
Theft prevention labels ....................... 73
Tire inflation pressure ......................... 432 Maintenance data ............................... 519
Tire inflation pressure display function ................................................ 424
Warning light ...................................... 468
Tire information ..................................... 525 Glossary .................................................532
Size ........................................................... 528
Tire identification number.............. 527
Uniform Tire Quality Grading.............................................. 530 Tire pressure warning system ..........424
Function .................................................. 424
Initializing ............................................... 424
Installing tire pressure warning valves and transmitters................ 424
Registering ID codes ....................... 426
Tire pressure warning reset switch ................................................... 425
Warning light .......................................468
Tires ............................................................423 Chains ....................................................... 261
Checking ............................................... 423
If you have a flat tire ..........................486
Inflation pressure..................................519
Information............................................ 525
Replacing ...............................................486
Rotating tires ........................................ 423
Size .............................................................519
Snow tires .............................................. 262
Spare tire................................................486
Tire inflation pressure display function................................................ 424
Tire pressure warning system ..... 424
Warning light .......................................468
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