2020 TOYOTA COROLLA check engine

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)

5138-2. Steps to take in an emergency
COROLLA_U
8
When trouble arises
■When the electronic key does
not work properly
●Make sure that the smart key sys-
tem has not been deactivated in
the customization setting. If it is
off, turn the function on. (Custom-
izable features: P.548)
●Check if battery-saving mode is
set. If it is set, cancel the function.
( P. 1 1 3 )
Use the mechanical key
( P.100) in order to perform the
If you lose your keys
New genuine keys can be
made by your Toyota dealer
using the other key (vehi-
cles without a smart key
system) or mechanical key
(vehicles with a smart key
system) and the key number
stamped on your key num-
ber plate.
Keep the plate in a safe
place such as your wallet,
not in the vehicle.
NOTICE
■When an electronic key is lost
(vehicles with a smart key
system)
If the electronic key remains lost,
the risk of vehicle theft increases
significantly. Visit your Toyota
dealer immediately with all
remaining electronic keys that
were provided with your vehicle.
If the electronic key
does not operate prop-
erly (vehicles with a
smar t key system)
If communication between
the electronic key and vehi-
cle is interrupted ( P.113)
or the electronic key cannot
be used because the battery
is depleted, the smart key
system and wireless remote
control cannot be used. In
such cases, the doors can
be opened and the engine
can be started by following
the procedure below.
NOTICE
■In case of a smart key system
malfunction or other
key-related problems
Take your vehicle with all the elec-
tronic keys provided with your
vehicle to your Toyota dealer.
Locking and unlocking
the doors

5158-2. Steps to take in an emergency
COROLLA_U
8
When trouble arises
ACC.
3 Firmly depress the brake
pedal (continuously variable
transmission) or clutch pedal
(manual transmission) and
check that is shown on
the multi-information display.
4 Press the engine switch
shortly and firmly.
In the event that the engine still
cannot be started, contact your
Toyota dealer.
■Stopping the engine
Shift the shift lever to P (continu-
ously variable transmission) or N
(manual transmission) and press
the engine switch as you normally
do when stopping the engine.
■Electronic key battery
As the above procedure is a tempo-
rary measure, it is recommended
that the electronic key battery be
replaced immediately when the bat-
tery is depleted. ( P.458)
■Changing engine switch modes
Release the brake pedal (continu-
ously variable transmission) or
clutch pedal (manual transmission)
and press the engine switch in step
3 above.
The engine does not start and
modes will be changed each time
the switch is pressed. ( P.151)
If the vehicle batter y
is discharged
The following procedures
may be used to start the
engine if the vehicle’s bat-
tery is discharged.
You can also call your Toy-
ota dealer or a qualified
repair shop.

5208-2. Steps to take in an emergency
COROLLA_U
hoses and radiator core (radi-
ator) for any leaks.
Radiator
Cooling fan
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
4The coolant level is satisfac-
tory if it is between the
“FULL” and “LOW” lines on
the reservoir.
Reservoir
“FULL” line
“LOW” line
5 Add engine coolant if neces-
sary.
Water can be used in an emer-
gency if engine coolant is unavail- able.
6
Start the engine and turn the
air conditioning system on to
check that the radiator cool-
ing fan operates and to check
for coolant leaks from the
radiator or hoses.
The fan operates when the air con-
ditioning system is turned on imme-
diately after a cold start. Confirm
that the fan is operating by check-
ing the fan sound and air flow. If it is
difficult to check these, turn the air
conditioning system on and off
repeatedly. (The fan may not oper-
ate in freezing temperatures.)
7If the fan is not operating:
Stop the engine immediately
and contact your Toyota
dealer.
If the fan is operating: Have
the vehicle inspected at the
nearest Toyota dealer.
WARNING
■When inspecting under the
hood of your vehicle
Observe the following precau-
tions. Failure to do so may result
in serious injury such as burns.

5269-1. Specifications
COROLLA_U
■Oil capacity (Drain and refill
[Reference
*])
*: The engine oil capacity is a refer-ence 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 Toyota vehicle. Use
Toyota approved “Toyota Genu-
ine Motor Oil” or equivalent to
satisfy the following grade and
viscosity.
Oil grade: ILSAC GF-5 multi-
grade engine oil
Recommended viscosity: SAE
0W-20
SAE 0W-20 is the best choice
for good fuel economy and good starting 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.
Recommended viscosity (SAE):
Outside temperature
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 before
the W allow for easier starting
of the engine in cold weather.
• The 20 in 0W-20 indicates the viscosity characteristic of the
oil when the oil is at high tem-
perature. An oil with a higher
viscosity (one with a higher
Fuel
Fuel typeUnleaded gasoline only
Octane Rating87 (Research Octane Number 91) or
higher
Fuel tank capacity
(Reference)13.2 gal. (50.0 L, 11.0 Imp. gal.)
Lubrication system (1.8 L
4-cylinder [2ZR-FAE]
engine)
With filter4.4 qt. (4.2 L, 3.7 Imp.
qt.)
Without
filter4.1 qt. (3.9 L, 3.4 Imp.
qt.)

5279-1. Specifications
COROLLA_U
9
Vehicle specifications
value) may be better suited if
the vehicle is operated at high
speeds, or under extreme
load conditions.
How to read oil container label:
The International Lubricant
Specification Advisory Commit-
tee (ILSAC) Certification Mark is
added to some oil containers to
help you select the oil you
should use.
■Oil capacity (Drain and refill
[Reference
*])
*: The engine oil capacity is a refer- ence 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 Toyota vehicle. Use
Toyota approved “Toyota Genu-
ine Motor Oil” or equivalent to
satisfy the following grade and
viscosity.
Oil grade: API SN/RC multi-
grade engine oil
Recommended viscosity: SAE
0W-16
Outside temperature
SAE 0W-16 is the best choice
for good fuel economy and good
starting in cold weather.
If SAE 0W-16 is not available,
SAE 0W-20 oil may be used.
However, it must be replaced
with SAE 0W-16 at the next oil
change.
Oil viscosity (0W-16 is explained
here as an example):
• The 0W in 0W-16 indicates the characteristic of the oil
which allows cold startability.
Oils with a lower value before
the W allow for easier starting
of the engine in cold weather.
• The 16 in 0W-16 indicates the viscosity characteristic of the
oil when the oil is at high tem-
perature. An oil with a higher
Lubrication system (2.0 L
4-cylinder [M20A-FKS]
engine)
With filter4.9 qt. (4.6 L, 4.0 Imp.
qt.)
Without filter4.5 qt. (4.3 L, 3.8 Imp.
qt.)

568What to do if... (Troubleshooting)
COROLLA_U
1-1.What to do if... (Troubleshooting)What to do if... (Troubleshooting)
 If you lose your keys or
mechanical keys, new genu-
ine keys or mechanical keys
can be made by your Toyota
dealer. ( P.513)
 If you lose your keys or elec-
tronic keys, the risk of vehicle
theft increases significantly.
Contact your Toyota dealer
immediately. ( P.513)
 Is the key battery weak or
depleted? ( P.458)
 Vehicles with a smart key sys-
tem: Is the engine switch in
ON?
When locking the doors, turn the
engine switch off. ( 
P.150)
Vehicles with a smart key sys-
tem: 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 due to the condition
of the radio wave. ( P.99,
113)
 Is the child-protector lock set?
The rear door cannot be opened
from inside the vehicle when the
lock is set. Open the rear door from
outside and then unlock the
child-protector lock. ( 
P. 1 0 7)
Continuously variable trans-
mission: Is the shift lever in
P? ( P.147)
 Manual transmission: Do you
turn the key with the clutch
pedal depressed firmly?
( P.147)
 Is the steering wheel
unlocked? ( P.147)
 Is the battery discharged?
( P.515)
If you have a problem,
check the following before
contacting your Toyota
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
If you think something is
wrong
The engine does not start
(vehicles without 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