2020 TOYOTA COROLLA check engine light

4908-2. Steps to take in an emergency
COROLLA_U
■Warning messages
The warning messages explained
below may differ from the actual
messages according to operation
conditions and vehicle specifica-
tions.
■Warning buzzer
A buzzer may sound when a mes-
sage is displayed.
The buzzer may not be audible if the
vehicle is in a noisy location or if the
audio system volume is high.
■If “Engine Oil Level Low Add or
Replace” is displayed
The engine oil level is low. Check
WARNING
Your vehicle has also been
equipped with a TPMS (tire pres-
sure warning system) malfunc-
tion indicator to indicate when the
system is not operating properly.
The TPMS (tire pressure warning
system) malfunction indicator is
combined with the low tire pres-
sure telltale (tire pressure warning
light). When the system detects a
malfunction, the telltale will flash
for approximately one minute and
then remain cont inuously illumi-
nated. This sequence will con-
tinue upon subsequent vehicle
start-ups as long as the malfunc-
tion exists. When the malfunction
indicator is illuminated, the sys-
tem may not be able to detect or
signal low tire pressure as
intended.
TPMS (tire pressure warning sys-
tem) malfunctions may occur for a
variety of reasons, including the
installation of replacement or
alternate tires or wheels on the
vehicle that prevent the TPMS
(tire pressure warning system)
from functioning properly. Always
check the TPMS (tire pressure
warning system) malfunction tell-
tale after replacing one or more
tires or wheels on your vehicle to
ensure that the replacement or
alternate tires and wheels allow
the TPMS (tire pressure warning
system) to continue to function
properly.
NOTICE
■To ensure the tire pressure
warning system operates
properly (vehicles with a tire
pressure warning system)
Do not install tires with different
specifications or makers, as the
tire pressure wa rning system may
not operate properly.
If a war ning message
is displayed
The multi-information dis-
play shows warnings for
system malfunctions and
incorrectly performed oper-
ations, and messages that
indicate a need for mainte-
nance. When a message is
displayed, perform the
appropriate corrective
action for the message.
If a warning message is dis-
played again after the
appropriate actions have
been performed, contact
your Toyota dealer.
Additionally, if a warning
light comes on or flashes at
the same time that a warn-
ing message is displayed,
take the appropriate correc-
tive action for the warning
light. ( P.481)

4918-2. Steps to take in an emergency
COROLLA_U
8
When trouble arises
the level of the engine oil, and add if
necessary.
This message may appear if the
vehicle is stopped on a slope. Move
the vehicle to a level surface and
check to see if the message disap-
pears.
■If “Engine Stopped Steering
Power Low” is displayed
This message is displayed if the
engine is stopped while driving.
When steering wheel operations are
heavier than usual, grip the steering
wheel firmly and operate it using
more force than usual.
■If “Auto Power OFF to Conserve
Battery” is displayed
Power was cut off due to the auto-
matic power off function. Next time
when starting the engine, increase
the engine speed slightly and main-
tain that level for approximately 5
minutes to recharge the battery.
■If “Headlight System Malfunc-
tion Visit Your Dealer” is dis-
played
The following systems may be mal-
functioning. Have the vehicle
inspected by your Toyota dealer
immediately.
●The LED headlight system
●AFS (Adaptive Front-lighting Sys-
tem) (if equipped)
●The automatic headlight leveling
system (if equipped)
●Automatic High Beam
■If “Front Camera Unavailable”
or “Front Camera Unavailable
See Owner’s Manual” is dis-
played
The following systems may be sus-
pended until the problem shown in
the message is resolved. ( P.185,
481)
●PCS (Pre-Collision system)
●LTA (Lane Tracing Assist) (if
equipped)
●LDA (Lane Departure Alert with
steering control) (if equipped)
●Automatic High Beam
●RSA (Road Sign Assist) (if
equipped)
●Dynamic radar cruise control with
full-speed range (if equipped)
●Dynamic radar cruise control (if
equipped)
■If “Radar Cruise Control
Unavailable See Owner's Man-
ual” is displayed
The dynamic radar cruise control
with full-speed range system or
dynamic radar cruise control system
is suspended temporarily or until the
problem shown in the message is
resolved. (causes and coping meth-
ods: P.185)
■If “Radar Cruise Control
Unavailable” is displayed
The dynamic radar cruise control
with full-speed range system or
dynamic radar cruise control system
cannot be used temporarily. Use the
system when it becomes available
again.
■If “Maintenance Required
Soon” is displayed
Indicates that all maintenance
according to the driven distance on
the maintenance schedule
* should
be performed soon.
Comes on approximately 4500
miles (7200 km) after the message
has been reset. If necessary, per-
form maintenance. Please reset the
message after the maintenance is
performed. ( P.428)
*: Refer to the separate “Scheduled
Maintenance” or “Owner’s Man-
ual Supplement” for the mainte-
nance interval applicable to your
vehicle.
■If “Maintenance Required Visit
Your Dealer” is displayed
Indicates that all maintenance is

5128-2. Steps to take in an emergency
COROLLA_U
The battery terminal connec-
tions may be loose or cor-
roded. ( P.442)
The engine starting system may
be malfunctioning due to an
electrical problem such as elec-
tronic key battery depletion or a
blown fuse. However, an interim
measure is available to start the
engine. ( P.512)
One of the following may be the
cause of the problem:
 The battery may be dis-
charged. ( P.515)
 One or both of the battery ter-
minals may be disconnected.
( P.442)
 There may be a malfunction
in the steering lock system.
Contact your Toyota dealer if the
problem cannot be repaired, or if
repair procedures are unknown.
When the engine does not start,
the following steps can be used
as an interim measure to start
the engine if the engine switch is
functioning normally.
Do not use this starting proce-
dure except in case of emer-
gency.
1 Set the parking brake.
( P.163, 164)
2 Check that the shift lever is in
P (continuously variable
transmission) or N (manual
transmission).
3 Turn the engine switch to
ACC.
4 Press and hold the engine
switch for about 15 seconds
while depressing the brake
pedal (continuously variable
transmission) or clutch pedal
(manual transmission) firmly.
Even if the engine can be started
using the above steps, the system
may be malfunctioning. Have the
vehicle inspected by your Toyota
dealer.
The starter motor does
not turn over (vehicles
with a smart key system)
The starter motor does
not turn over, the interior
lights and headlights do
not turn on, or the horn
does not sound.
Emergency start function
(vehicles with a smart key
system)

570What to do if... (Troubleshooting)
COROLLA_U
 The seat belt reminder light is
flashing
Are the driver and the passenger
wearing the seat belts? ( 
P.484)
The parking brake indicator is
on
Is the parking brake released?
(
P.163, 164)
Depending on the situation,
other types of warning buzzer
may also sound. ( P.481, 490)
 Did anyone inside the vehicle
open a door during setting the
alarm?
The sensor detects it and the alarm
sounds. ( 
P. 6 9)
Do one of the following to deac-
tivate or stop the alarms:
Unlock the doors.
 Turn the engine switch to
ACC or ON, or start the
engine. (The alarm will be
deactivated or stopped after a
few seconds.)
 Is the electronic key left inside
the vehicle?
Check the message on the
multi-information display. ( 
P. 4 9 0)
When a warning light turns on
or a warning message is dis-
played, refer to P.481, 490.
 Vehicles with an emergency
tire puncture repair kit: Stop
the vehicle in a safe place and
repair the flat tire temporarily
with the emergency tire punc-
ture repair kit. ( P.493)
 Vehicles with a spare tire:
Stop the vehicle in a safe
place and replace the flat tire
with the spare tire. ( P.503)
 Try the procedure for when
the vehicle becomes stuck in
mud, dirt, or snow. ( P.521)
An alarm is activated and
the horn sounds (vehicles
with an alarm)
A warning buzzer sounds
when leaving the vehicle
(vehicles with a smart key
system)
A warning light turns on
or a warning message is
displayed
When a problem has
occurred
If you have a flat tire
The vehicle becomes
stuck

574Alphabetical Index
COROLLA_U
Outside rear view mirrors ..... 125
Rear door child-protectors.... 107
Side doors ............................ 103
Drive distance ........................... 90
Drive information ..................... 90
Drive-start control .................. 136
Driving Break-in tips ......................... 136
Correct driving posture ........... 23
Driving mode select switch... 249
Procedures ........................... 134
Winter drive tips ................... 255
Driving information display ..... 87
Driving range ............................ 88
Driving support system informa- tion display ............................. 89
Dynamic radar cruise control 223 Warning message ................ 231
Dynamic radar cruise control with full-speed range ........... 213Warning message ................ 222
E
Eco Driving Indicator ............... 88
Eco Driving Indicator Light ..... 88
EDR (Event data recorder)......... 8
Elapsed time ............................. 90
Electric Power Steering (EPS) ............................................... 251Warning light ........................ 484
Electronic key ........................... 96 Battery-saving function......... 112
If the electronic key does not operate properly ................. 513
Replacing the battery ........... 458
Emergency flashers ............... 472
Emergency tire puncture repair kit ........................................... 493
Emergency, in case of If a warning buzzer sounds .. 481
If a warning light turns on ..... 481 If a warning message is dis-
played .................................490
If the battery is discharged ...515
If the electronic key does not operate properly .................513
If the engine will not start...... 511
If the vehicle is trapped in rising water...................................474
If you have a flat tire .....493, 503
If you lose your keys.............513
If you think something is wrong ...........................................479
If your vehicle becomes stuck ...........................................521
If your vehicle has to be stopped in an emergency .................472
If your vehicle ne eds to be towed
...........................................475
If your vehicle overheats ......519
Enform App Suite button (Setup screen) ...................................266
Engine ACCESSORY mode .............151
Compartment........................436
Engine switch ...............147, 148
Fuel pump shut off system ...480
Hood .....................................434
How to start the engine 147, 148
Identification number ............525
If the engine will not start...... 511
If your vehicle has to be stopped in an emergency .................472
Ignition switch (engine switch) ...................................147, 148
Overheating ..........................519
Tachometer.......................77, 81
Engine coolant Capacity ...............................528
Checking ..............................440
Preparing and checking before winter ..................................255

5751-1. What to do if... (Troubleshooting)
COROLLA_U575Alphabetical Index
Engine coolant temperature gauge................................. 77, 81
Engine immobilizer system ..... 67
Engine oil Capacity ....................... 526, 527
Checking .............................. 437
Preparing and checking before winter.................................. 255
Warning light ........................ 482
Engine switch ................. 147, 148 Auto power off function ........ 151
Changing the engine switch modes ................................ 151
If your vehicle has to be stopped in an emergency................. 472
Enhanced VSC ........................ 251
Entering letters and num- bers/list screen operation ... 271Entering letters and numbers271
List screen ............................ 272
Entune Audio buttons overview ............................................... 261
EPS (Electric Power Steering) ............................................... 251Warning light ........................ 484
Establishing an Apple CarPlay connection ............................ 292
Event data record er (EDR)......... 8
F
Flat tire
Tire pressure warning system........................................... 447
Vehicles with a spare tire ..... 503
Vehicles without a spare tire 493
Floor mats ................................. 22
Fluid Brake .................................... 530
Clutch ................................... 530
Continuously variable transmis-sion..................................... 529
Washer ................................. 443 FM ............................................307
Front passenger occupant clas-
sification system ....................39
Front seats Adjustment ........................... 118
Cleaning ...............................424
Correct driving posture ...........23
Head restraints .....................121
Seat heaters .........................396
Front side marker lights Light switch...........................170
Replacing light bulbs ............466
Wattage ................................533
Front turn signal lights Replacing light bulbs ............465
Turn signal lever ...................162
Wattage ................................533
Front turn signal/parking lights Replacing light bulbs ............465
Fuel Capacity ...............................526
Fuel gauge .......................77, 81
Fuel pump shut off system ...480
Information ......... ..................535
Refueling ..............................178
Type......................................526
Warning light.........................484
Fuel consumption Average fuel economy ............88
Current fuel consumption .......88
Fuel economy ...........................88
Fuel filler door Refueling ..............................178
Fuel gauge...........................77, 81
Fuel pump shut off system ....480
Fuses .......................................461
G
Garage door open er ...............414
Gauges ................................77, 81
General button (Setup screen) .......................................266, 296

582Alphabetical Index
COROLLA_U
Vehicle-to-vehicle distance switch ......................... 214, 224
VSC OFF switch................... 251
Window lock switch .............. 129
Windshield wiper and washer switch ................................. 176
T
Tachometer ......................... 77, 81
Tail lights Light switch .......................... 170
Replacing light bulbs ............ 465
Talking on the Bluetooth
®
hands-free system ............... 354 Call screen operation ........... 354
Incoming call waiting ............ 355
Sending tones ...................... 354
Transmit volume setting ....... 355
Theft deterrent system Alarm ...................................... 69
Engine immobilizer system .... 67
Tire inflation pressure............ 453 Maintenance data................. 531
Warning light ........................ 485
Tire information ...................... 537 Glossary ............................... 541
Size ...................................... 539
Tire identification number ..... 539
Uniform Tire Quality Grading 540
Tire pressure warning system Function ............................... 447
Initializing ............................. 450
Installing tire pressure warning valves and transmitters ...... 449
Registering ID codes ............ 451
Warning light ........................ 485
Tires Chains .................................. 256
Checking .............................. 444
Emergency tire puncture repair kit........................................ 493
If you have a flat tire ..... 493, 503 Inflation pressure
..................453
Information ......... ..................537
Replacing .............................503
Rotating tires ........................446
Size ......................................531
Snow tires.............................255
Spare tire ..............................503
Tire pressure warning system ...........................................447
Warning light.........................485
Tools ................................494, 504
Top tether strap ........................58
Total load capacity .................524
Touch screen ..........................268 Touch screen gestures .........268
Touch screen operation ........268
To w i n g Dinghy towing .......................146
Emergency towing ................475
Towing eyelet........................477
Trailer towing ........................145
Toyota Entune .........................373
Toyota Entune App Suite Entering keyword ..................381
Toyota Entune App Suite Con- nect ........................................379
Toyota Entune App Suite Con- nect settings .........................383
Toyota Safety Sense 2.0 Automatic High Be am ...........173
Dynamic radar cruise control 223
Dynamic radar cruise control with full-speed range ..........213
LDA (Lane Departure Alert with steering control)..................205
LTA (Lane Tracing Assist) .....195
PCS (Pre-Collisio n System) .187
RSA (Road Sign Assist) ........233
TRAC (Traction Control) ........251
Traction Control (TRAC) ........251
Trailer towing ..........................145

584Alphabetical Index
COROLLA_U
Seat belt ....................... 484, 485
Warning lights ........................ 481 ABS ...................................... 483
Brake hold operated indicator........................................... 487
Brake Override System ........ 483
Brake system ....................... 481
Charging system .................. 482
Drive-Start Control ............... 483
Electric power steering ......... 484
High coolant temperature ..... 481
iMT indicator ......................... 487
LDA indicator ........................ 485
Low engine oil pressure ....... 482
Low fuel level ....................... 484
LTA indicator ......................... 485
Malfunction indicator lamp ... 482
Parking brake indicator ........ 486
Pre-collision system ............. 486
Seat belt reminder light 484, 485
Slip indicator......................... 486
SRS ...................................... 482
Tire pressure ........................ 485
Warning messages................. 490
Washer Checking .............................. 443
Preparing and checking before winter.................................. 255
Switch................................... 176
Washing and waxing .............. 422
Weight Cargo capacity ..................... 145
Load limits ............................ 145
Wheels ..................................... 455 Replacing ............................. 455
Size ...................................... 531
Wi-Fi
®...................................... 287
Connecting a device to the in-vehicle access point ....... 287
Operating hints ..................... 290
Wi-Fi
® button (Setup screen) 266
Wi-Fi® Hotspot ........................ 287 Window lock switch ...............129
Windows
Power windows ....................127
Rear window defogger .388, 392
Washer .................................176
Windshield wiper de-icer .......395
Windshield wipers ..................176
Winter driving tips ..................255
Wireless charger.....................405
Wireless remote control Battery-Saving Function ....... 112
Locking/Unlocking ..................98
Replacing the battery ...........458
For vehicles with Entune Audio Plus or Entune Pre-
mium Audio, refer to
“NAVIGATION AND MUL-
TIMEDIA SYSTEM
OWNER’S MANUAL” for
information regarding the
equipment listed below.
· Navigation system
· Audio/visual system
· Rear view monitor system