check engine light TOYOTA COROLLA 2023 Owner's Manual

3146-3. Do-it-yourself maintenance
temperature. (Ways of coping:
P.360, 397)
 When “Immediately Check
Tire when Safe” is displayed
(Emergency Warning)
A warning with the tire pressure
warning light and warning buzzer
when there is a known level of low
tire pressure with the appearance
of the tire due to pressure suddenly
lowering. (Ways of coping: P.360,
370)
However, the system may not be
able to detect sud den tire ruptures
(bursting, etc.).
The tire pressure detected by the
tire pressure warning system can
be displayed on the multi-informa-
tion display.
■How to change the unit
4.2-inch display
1 Park the vehicle in a safe
place and turn the engine
switch off.
Changing the unit cannot be per-
formed while the vehicle is moving.
2Turn the engine switch to
ON. 3
Select of the multi-infor-
mation display and then
press .
4 Press or to select
“Vehicle Settings” and then
press and hold .
5 Press or to select
“TPWS setting” and then
press .
6 Press or to select
“Pressure unit setting”.
7 Press or to select the
desired unit and then press
.
7-inch display
1 Park the vehicle in a safe
place and turn the engine
switch off.
Changing the unit cannot be per-
formed while the vehicle is moving.
2Turn the engine switch to
ON.
3 Select of the multi-infor-
mation display and then
press .
4 Press or to select
“Vehicle Settings” and then
press and hold .
5 Press or to select
“TPWS setting” and then
press .

3647-2. Steps to take in an emergency
system warning light may come on
and the warning buzzer may sound.
■When the tire pressure warning
light comes on (vehicles with a
tire pressure warning system)
Inspect the tires to check if a tire is
punctured.
If a tire is punctured: P.370
If none of the tires are punctured:
Turn the engine switch off then turn
it to ON. Check if the tire pressure
warning light comes on or blinks.
If the tire pressure warning light
blinks for approximately 1 minute
then stays on
There may be a malfunction in the
tire pressure warning system. Have
the vehicle inspected by your Toyota
dealer immediately.
If the tire pressure warning light
comes on
1 After the temperature of the tires
has lowered sufficiently, check
the inflation pressure of each tire
and adjust them to the specified
level.
2 If the warning light does not turn
off even after several minutes
have elapsed, check that the
inflation pressure of each tire is
at the specified level and perform
initialization. ( P.318)
■The tire pressure warning light
may come on due to natural
causes (vehicles with a tire
pressure warning system)
The tire pressure warning light may
come on due to natural causes such
as natural air leaks and tire inflation
pressure changes caused by tem-
perature. In this case, adjusting the
tire inflation pressure will turn off the
warning light (after a few minutes).
■When a tire is replaced with a
spare tire (vehicl es with a tire
pressure warning system)
The compact spare tire is not
equipped with a tire pressure warn-
ing valve and transmitter. If a tire goes flat, the tire pressure warning
light will not turn off even though the
flat tire has been replaced with the
spare tire. Replace the spare tire
with the repaired tire and adjust the
tire inflation pressure. The tire pres-
sure warning light will go off after a
few minutes.
■Conditions that the tire pres-
sure warning system may not
function properly (vehicles with
a tire pressure warning system)
 P.315
WARNING
■If both the ABS and the brake
system warning lights remain
on
Stop your vehicle in a safe place
immediately and contact your Toy-
ota dealer.
The vehicle will become
extremely unstable during brak-
ing, and the ABS system may fail,
which could cause an accident
resulting in death o r serious injury.
■When the electric power
steering system warning light
comes on
When the light comes on yellow,
the assist to the power steering is
restricted. When the light comes
on red, the assis t to the power
steering is lost and handling oper-
ations of the steering wheel
become extremely heavy.
When steering wheel operations
are heavier than usual, grip the
steering wheel firmly and operate
it using more fo rce than usual.
■If the tire pressure warning
light comes on ( vehicles with
a tire pressure warning sys-
tem)
Be sure to observe the following
precautions.
Failure to do so could cause a
loss of vehicle control and result
in death or serious injury.

3667-2. Steps to take in an emergency
■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
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 r eplacement 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 warning 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.356)

3677-2. Steps to take in an emergency
7
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 th an 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 recha rge 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
●AHB (Automatic High Beam)
■If “System Malfunction Visit
Your Dealer” is displayed
Indicates one of the following sys-
tems is disabled.
●PCS (Pre-Collision system)
●LDA (Lane Departure Alert)
●LTA (Lane Tracing Assist)
●AHB (Automatic High Beam)
●Dynamic radar cruise control
●RSA (Road Sign Assist) (if
equipped)
●BSM (Blind Spot Monitor) (if
equipped)
●RCTA (Rear Cross Traffic
Alert) (if equipped)
●SEA (Safe Exit Assist) (if
equipped)
Have the vehicle inspected by your
Toyota dealer immediately.
■If “System Stopped See
Owner’s Manual” is displayed
Indicates one of the following sys-
tems is disabled.
●PCS (Pre-Collision system)
●LDA (Lane Departure Alert)
●LTA (Lane Tracing Assist)
●AHB (Automatic High Beam)
●Dynamic radar cruise control
●RSA (Road Sign Assist) (if
equipped)
●BSM (Blind Spot Monitor) (if
equipped)
●RCTA (Rear Cross Traffic
Alert) (if equipped)
●SEA (Safe Exit Assist) (if
equipped)
Follow the following correction
methods.
• Check the voltage of the battery
• Check the sensors that the Toyota Safety Sense 3.0 uses for foreign
matter covering them. Remove
them if any. ( P.185)
Indicates the sensors may not be
operating properly. ( P.188)
When problems are solved and the
sensors are operational, this indica-
tion may disappear by itself.
■If “System Stopped Front Cam-
era Low Visibility See Owner’s
Manual” is displayed
Indicates one of the following sys-
tems is disabled.
●PCS (Pre-Collision system)
●LDA (Lane Departure Alert)

3807-2. Steps to take in an emergency
The battery terminal connec-
tions may be loose or cor-
roded. ( P.308)
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.380)
One of the following may be the
cause of the problem:
 The battery may be dis-
charged. ( P.383)
 One or both of the battery ter-
minals may be disconnected.
( P.308)
 Vehicles without a smart key
system: There may be a mal-
function in the steering lock
system.
Contact your Toyot a 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.168)
2 Check that the shift lever is in
P.
3 Turn the engine switch to
ACC
*.
4 Press and hold the engine
switch for about 15 seconds
while depressing the brake
pedal firmly.
Even if the engi ne can be started
using the above steps, the system
may be malfunctioning. Have the
vehicle inspected by your Toyota
dealer.
*: ACC mode can be enabled/dis- abled on the customize menu.
( P.412)
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)

438What to do if... (Troubleshooting)
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.366)
 When a warning light turns on
or a warning message is dis-
played, refer to P.356, 366.
 Stop the vehicle in a safe
place and replace the flat tire
with the spare tire. ( P.370)
 Try the procedure for when
the vehicle becomes stuck in
mud, dirt, or snow. ( P.389)
A warning buzzer sounds
when leaving the vehicle
( v e h i c l e s w i t h a s m a r t k e y
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

442Alphabetical Index
If your vehicle has to be stopped in an emergency................. 348
Ignition switch (engine switch) ................................... 154, 155
Overheating.......................... 387
Tachometer ............................ 86
Engine coolant Capacity ............................... 395
Checking .............................. 306
Preparing and c hecking before
winter.................................. 253
Engine coolant temperature gauge................................. 86, 89
Engine immobilizer system ..... 77
Engine oil Capacity ............................... 394
Checking .............................. 304
Preparing and c hecking before
winter.................................. 253
Warning light ........................ 357
Engine switch ................. 154, 155 Auto power off function ........ 159
Changing the engine switch modes ................................ 158
If your vehicle has to be stopped in an emergency................. 348
Enhanced VSC ........................ 249
EPS (Electric Power Steering) ............................................... 249Warning light ........................ 358
Event data recorder (EDR)......... 8
F
Flat tire Tire pressure warning system........................................... 313
Vehicles with a spare tire ..... 370
Floor mats ................................. 24
Fluid Brake .................................... 396
Continuously variable transmis-sion..................................... 396 Washer .................................310
Front passenger occupant clas- sification system ....................41
Front seats Adjustment ...........................125
Cleaning ...............................291
Correct driving posture ...........25
Head restraints .....................128
Seat heaters ....... ..................269
Front side marker lights Light switch...........................173
Replacing light bulbs ............342
Wattage ................................398
Front turn signal lights Replacing light bulbs ............341
Turn signal lever ...................167
Wattage ................................398
Front turn signal/parking lights Replacing light bulbs ............341
Fuel Capacity ...............................393
Fuel gauge .......................86, 89
Fuel pump shut off system ...355
Information ......... ..................399
Refueling ..............................180
Type......................................393
Warning light.........................359
Fuel consumption Average fuel economy ......93, 98
Current fuel consumption .93, 98
Fuel economy .....................93, 98
Fuel filler door Refueling ..............................180
Fuel gauge...........................86, 89
Fuel pump shut off system ....355
Fuses .......................................336
G
Gauges ................................86, 89
Glove box ................................274
Glove box light........................274

448Alphabetical Index
Tail lightsLight switch .......................... 173
Replacing light bulbs ............ 341
Theft deterrent system Alarm ...................................... 78
Engine immobilizer system .... 77
Tire inflation pre ssure............ 328
Maintenance data................. 397
Warning light ........................ 360
Tire information ...................... 401 Glossary ............................... 405
Size ...................................... 403
Tire identification number ..... 403
Uniform Tire Quality Grading 404
Tire pressure warning system Function ............................... 313
Installing tire pressure warning valves and transmitters ...... 315
Registering ID codes ............ 322
Registration of the position of each wheel ......................... 316
Setting the tire pressure ....... 318
Warning light ........................ 360
Tires Chains .................................. 254
Checking .............................. 311
If you have a flat tire ............. 370
Inflation pressure.................. 328
Information ........................... 401
Replacing ............................. 370
Rotating tires ........................ 313
Size ...................................... 397
Snow tires ............................ 253
Spare tire.............................. 370
Tire pressure warning system........................................... 313
Warning light ........................ 360
Tools ........................................ 371
Top tether strap ........................ 68
Total load capacity ................. 392
To w i n g Dinghy towing....................... 153 Emergency towing ................351
Towing eyelet........................353
Trailer towing ......
..................152
Toyota Safety Sense AHB (Automatic High Beam) 175
Cruise control .......................227
Dynamic radar cruise control 219
Emergency Driving Stop System...........................................230
LDA (Lane Departure Alert) ..206
LTA (Lane Tracing Assist) .....201
PCS (Pre-Collisio n System) .190
RSA (Road Sign Assist) ........217
Toyota Safety Sense 3.0[Toyota Safety Sense 3.0]PDA (Proactive driving assist) [PDA (Proactive driving assist)]........................................... 211
TRAC (Traction Control) ........249
Traction Control (TRAC) ........249
Trailer towing ..........................152
Transmission Continuously variable transmis-sion .............................160, 162
Driving mode select switch ...247
If th e s hif t le ver ca n no t b e s hif te d from P .........................161, 164
M mode ................................165
Paddle shift switches ....164, 165
Trip meters ..........................87, 90
Trunk ........................................ 117 Internal trunk rele ase lever ... 119
Smart key system ................. 118
Trunk light ............................. 119
Trunk opener ........................ 118
Wireless remote control........ 118
Trunk light ............................... 119 Wattage ................................398
Turn signal lights Replacing light bulbs ............341
Turn signal lever ...................167
Wattage ................................398

449Alphabetical Index
U
USB charging port.................. 277
V
Vanity lights ............................ 284Wattage ................................ 398
Vanity mirrors ......................... 284
Vehicle data recording ............... 6
Vehicle identifi cation number392
Vehicle information display ... 95, 100
Vehicle Stability Control (VSC) ............................................... 248
VSC (Vehicle Stability Control) ............................................... 248
W
Warning buzzers ABS ...................................... 358
Airbags ................................. 357
Approach warning ................ 226
Brake hold ............................ 363
Brake Override System ........ 358
Brake system ....................... 356
Charging system .................. 357
Downshifting......................... 166
Drive-Start Control ............... 358
Electric power steering ......... 358
Engine .................................. 357
High coolant temperature ..... 356
Key reminder ........................ 155
LDA (Lane Departure Alert) 206, 361
Low engine oil pressure ....... 357
LTA (Lane Tracing Assist) ... 201, 361
Open door .................... 113, 116
PDA (Proactive Driving Assist) ........................................... 361
Seat belt ....................... 359, 360 Warning lights .........................356
ABS ......................................358
Brake hold operated indicator...........................................363
Brake Override System ........358
Brake system ........................356
Charging system ..................357
Cruise control indicator.........362
Drive-Start Control ................358
Driving assist information indica- tor .......................................362
Dynamic radar cruise control indicator ..............................361
Electric power steering .........358
High coolant temperature .....356
LDA indicator ........................361
Low engine oil pressure .......357
Low fuel level........................359
LTA indicator .........................361
Malfunction indica tor lamp ....357
Parking brake indicator.........363
PDA indicator........................361
Pre-collision syst em .............361
Seat belt reminder light 359, 360
Slip indicator .........................362
SRS ......................................357
Tire pressure ...... ..................360
Warning messages .................366
Washer Checking ..............................310
Preparing and checking before winter ..................................253
Switch ...................................178
Washing and waxing ..............288
Weight Cargo capacity .....................152
Load limits ............................152
Wheels .....................................330 Replacing .............................330
Size ......................................397
Window lock switch ...............136