2023 HYUNDAI TUCSON HYBRID check engine light

Foreword/Starting your Hybrid/Plug-in hybrid vehicle1-50
Starting the Vehicle
Vehicles with smart key system
1. Carry the smart key or leave it inside the vehicle.
2. Make sure the parking brake is firmly applied.
3. Make sure the shift button is in P (Park). With the shift button in N
(Neutral), you cannot start the vehicle.
4. Depress the brake pedal.
5. Press the Engine Start/Stop button. If the hybrid system starts, the “
”
indicator will come on.
Whether the engine is cold or warm, it
should be started without depressing
the accelerator.
After following the start procedures,
“
” indicator on the instrument
cluster will turn on. For more details,
please check chapter 6.
ECONOMICAL and SAFE OPERATION of
Hybrid system
• Drive smoothly. Accelerate at a moderate rate and maintain a steady
cruising speed. Do not make “jack-
rabbit” starts. Do not race between
stoplights.
Avoid heavy traffic whenever possible.
Always maintain a safe distance
from other vehicles so you can
avoid unnecessary braking. This also
reduces brake wear out.
• The regenerative brake generates energy when the vehicle decelerates.
• When the hybrid battery power is low, the hybrid system automatically
recharges the hybrid battery.
• When the engine is running with the shift button in N (Neutral), the hybrid
system cannot generate electricity.
The hybrid battery cannot recharge
with the shift button in N (Neutral).
Information
In the hybrid system, the engine
automatically runs and stops. When
the hybrid system operates, the “
”
indicator is illuminated.
In the following situation, the engine may
operate automatically.
- When the engine is ready to run
- When the hybrid battery is being
charged
- Depending on the temperature
condition of the hybrid battery
Special Features
Hybrid vehicles sound different than
gasoline engine vehicles. When the
hybrid system operates, you may
hear a sound from the hybrid battery
system under the floor. If you apply
the accelerator pedal rapidly, you may
hear an unconventional sound. When
you apply the brake pedal, you may
hear a sound from the regenerative
brake system. When the hybrid system
is turned off or on, you may hear a
sound in the engine compartment. If
you depress the brake pedal repeatedly
when the hybrid system is turned on,
you may hear a sound in the engine
compartment. None of these sounds
indicate a problem. These are normal
characteristics of hybrid vehicles.
If any of following occur, it’s a normal
condition if you hear a motor sound in
the engine compartment:
- After turning off the hybrid system, the brake pedal is released.
- When the hybrid system is turned off, the brake pedal is applied.
- When the driver door is opened.
DRIVING THE HYBRID VEHICLE

03
3-49
How does the Air Bags System
Operate?
ONX4030055
The SRS consists of the following
components:
(1) Driver's front air bag module
(2) Passenger's front air bag module
(3) Side air bag modules
(4) Curtain air bag modules
(5) Retractor pre-tensioner
(6) Air bag warning light
(7) SRS control module (SRSCM)/
Rollover sensor
(8) Front impact sensors
(9) Side impact sensors
(10) Side pressure sensors
(11) Emergency fastening device system
(12) Occupant classification system
(13) Seat belt buckle sensor
The SRSCM continually monitors all SRS
components while the ignition switch
is ON to determine if a crash impact
is severe enough to require air bag
deployment or pre-tensioner seat belt
deployment.
SRS warning light
The SRS (Supplemental Restraint System)
air bag w
arning light on the instrument
panel displays the air bag symbol
depicted in the illustration. The system
checks the air bag electrical system for
malfunctions. The light indicates that
there is a potential problem with your
air bag system, which could include
your side and/or curtain air bags used
for rollover protection (if equipped with
rollover sensor).
WARNING
If your SRS malfunctions, the air bag
may not inflate properly during an
accident, increasing the risk of serious
injury or death.
If any of the following conditions occur,
your SRS is malfunctioning:

[ The light does not turn on for
approximately three to six seconds
when the Engine Start/Stop button is
in the ON position.

[ The light stays on after illuminating
for approximately three to six
seconds.

[ The light comes on while the vehicle
is in motion.

[ The light blinks when the engine is
running.
Have an authorized HYUNDAI dealer
inspect the SRS as soon as possible if
any of these conditions occur.

4
Electronic Stability Control (ESC) OFF indicator light ...........................................4-20
Immobilizer Indicator Light (without smart key) ...................................................4-20
Immobilizer indicator light (with smart key) ...........................................................4-21
Downhill Brake Control (DBC) indicator light .........................................................4-21
Turn signal indicator light ........................................................................\
................ 4-22
High beam indicator light ........................................................................\
............... 4-22
Low beam indicator light ........................................................................\
................ 4-22
Light ON indicator light ........................................................................\
................... 4-22
High Beam Assist indicator light ........................................................................\
..... 4-22
Cruise indicator light ........................................................................\
....................... 4-22
SPORT Mode indicator light ........................................................................\
............ 4-23
SMART Mode indicator light ........................................................................\
........... 4-23
LCD Display Messages ........................................................................\
....................... 4-23 Shift to P ........................................................................\
........................................... 4-23
Low key battery ........................................................................\
................................ 4-23
Press START button while turning wheel ............................................................... 4-23
Check steering wheel lock system ........................................................................\
. 4-23
Press brake pedal to start engine ........................................................................\
... 4-24
Key not in vehicle ........................................................................\
............................. 4-24
Key not detected ........................................................................\
.............................. 4-24
Press START button again ........................................................................\
............... 4-24
Press START button with key ........................................................................\
........... 4-24
Check BRAKE SWITCH fuse ........................................................................\
............ 4-24
Shift to P to start engine ........................................................................\
.................. 4-24
12V battery discharging due to additional electrical devices ............................... 4-24
Door, Hood, Liftgate open indicator ....................................................................... 4-25
Sunroof open indicator ........................................................................\
.................... 4-25
Low pressure ........................................................................\
.................................... 4-25
Wiper/Lights display ........................................................................\
........................4-26
Low washer fluid ........................................................................\
..............................4-26
Low fuel ........................................................................\
............................................4-26
Engine has overheated ........................................................................\
....................4-26
Low engine oil ........................................................................\
..................................4-26
Check headlight ........................................................................\
...............................4-26
Check turn signal ........................................................................\
............................. 4-27
Check brake light ........................................................................\
............................. 4-27
Check headlight LED ........................................................................\
....................... 4-27
Ready to start driving ........................................................................\
...................... 4-27
Check regenerative brakes......................................................................\
................ 4-27
Stop vehicle and check brakes ........................................................................\
....... 4-27
Check Hybrid system ........................................................................\
....................... 4-27
Stop safely and check Hybrid system .................................................................... 4-27

Instrument Cluster4-10
Transmission Shift Indicator (if
equipped)
Automatic transmission shift
indicator
„4.2-Inch
OTM040016
„10.25-inch
OCN7040013N
The Transmission Shift Indicator is shown
in the upper corner of the LCD display to
indicate the current gear or Park(P).
Warning and Indicator Lights
Information
Make sure that all warning lights are OFF
after starting the engine. If any light is still
ON, this indicates a situation that needs
attention.
Seat belt warning light
This warning light informs the driver that
the seat belt is not fastened.
For more details, refer to “Seat Belts”
section in chapter 3.
Air bag warning light
This warning light illuminates:

[ When y
ou set the ignition switch or
the Engine Start/Stop button to the
ON position.
- The air bag warning light illuminates for about 3 ~ 6 seconds and then
turns off when all checks have been
performed.

[ The air bag warning light will remain
illuminated if there is a malfunction
with the Safety Restraint System (SRS)
air bag operation.
If the Air Bag warning light remains
illuminated while driving, have the
vehicle inspected by an authorized
HYUNDAI dealer.

04
4-11
Parking brake warning light
This warning light illuminates:

[When y
ou set the ignition switch or
the Engine Start/Stop button to the
ON position.

- The parking brake light illuminates
for about 3 seconds and will then
turn off once the parking brake is
released.

[ Whenever the parking brake is
applied.

[ Whenever the brake fluid level in the
reservoir is low.
- If the warning light illuminates with the parking brake released, it
indicates the brake fluid level in the
reservoir is low.

[ Whenever the regenerative brake
does not operate.
If the brake fluid level in the reservoir is
low:
1. Drive carefully to the nearest safe loca
tion and stop your vehicle.
2. With the engine stopped, check the brake fluid level immediately and add
fluid as required (For more details,
refer to “Brake Fluid” section in
chapter 9). After adding brake fluid,
check all brake components for fluid
leaks. If a brake fluid leak is found, or
if the warning light remains on, or if
the brakes do not operate properly, do
not drive the vehicle. Have the vehicle
inspected by an authorized HYUNDAI
dealer. Dual-diagonal braking system
Your vehicle is equipped with dual-
diagonal br

aking system. This means you
still have braking on two wheels even if
one of the dual systems should fail.
With only one of the dual systems
working, more than normal pedal travel
and greater pedal pressure is required to
stop the vehicle.
Also, the vehicle will not stop in as short
a distance with only a portion of the
brake system working.
If you experience a malfunction with
the brake system while driving, attempt
to slow your vehicle by coasting or
by using engine braking. You may be
able to reduce your vehicle speed by
manually downshifting to a lower gear.
Use Manual Shift Mode using either the
gear shift button or the paddle shifters (if
equipped) to shift to a lower gear.
WARNING
Parking Brake & Brake Fluid Warning
Light
Driving the vehicle with a warning light
ON is dangerous. If the Parking Brake
warning light illuminates with the
parking brake released, it indicates that
the brake fluid level is low.
If this occurs, have the vehicle
inspected by an authorized HYUNDAI
dealer.

04
4-15
AUTO HOLD indicator light
This indicator light illuminates:

[[Whit
e] When you activate the auto
hold system by pressing the AUTO
HOLD switch.

[ [Green] When you stop the vehicle
completely by depressing the brake
pedal with the Auto Hold system
activated.

[ [Yellow] Whenever there is a
malfunction with the Auto Hold
system.
If the AUTO HOLD indicator light
remains YELLOW while driving, have
the vehicle inspected by an authorized
HYUNDAI dealer.
For more details, refer to “Auto Hold”
section in chapter 6.
Charging system warning
light
This warning light illuminates:
When the battery is not being charged
while the engine is running. Immedia
tely
turn OFF all electrical accessories. Try
not to use electrically operated controls,
such as the power windows. Keep the
engine running.
Have the vehicle inspected by an
authorized HYUNDAI dealer as soon as
possible.
Engine oil pressure warning
light
This warning light illuminates:
When the engine oil pressure is low.
If the engine oil pressure is low:
1. Drive carefully to the nearest safe loca
tion and stop your vehicle.
2. Turn the engine off and check the engine oil level (For more details,
refer to “Engine Oil” section in
chapter 9). If the level is low, add oil
as required.
If the warning light remains on after
adding oil or if oil is not available, have
the vehicle inspected by an authorized
HYUNDAI dealer as soon as possible.
Continued driving with the warning light
on may cause engine failure.
Information
When engine oil pressure decreases due to
insufficient engine oil, etc., the Engine Oil
Pressure warning light will illuminate. In
addition, the enhanced engine protection
system which limits engine power will be
activated. When the engine oil pressure
is restored, the warning light and the
enhanced engine protection system will
turn off after the engine is restarted.

Instrument Cluster4-16
NOTICE
If the engine is not stopped
immediately after the Engine Oil
Pressure warning light is illuminated,
severe damage could result.
Low fuel level warning light
This warning light illuminates:
When the fuel tank is nearly empty.
A
dd fuel as soon as possible.
NOTICE
Driving with the Low Fuel Level warning
light on or with the fuel level below “E”
can cause the engine to misfire and
damage the catalytic converter.
Service warning light
This warning light illuminates:

[ When y
ou set the ignition switch or
the Engine Start/Stop button to the
ON position.

- The service warning light illuminates
for approximately 3 seconds and
then turns off when all checks have
been performed.

[ When there is a problem with the
hybrid vehicle control system or
hardware.
When the warning light illuminates while
driving, or does not go OFF after starting
the vehicle, have the vehicle inspected
by an authorized HYUNDAI dealer.
Charging Cable Connection
Indicator (Plug-in hybrid
vehicle)
This indicator illuminates in red when the
charging cable is connected.

04
4-23
SPORT Mode indicator light
This indicator light illuminates
When you select "SPORT" mode as drive
mode.
F
or more details, refer to "Drive Mode
Integrated Control System" in chapter
6.
SMART Mode indicator light
This indicator light illuminates:
When you select ''SMART" mode as drive
mode.
F

or more details, refer to "Drive Mode
Integrated Control System'' in chapter
6.
LCD Display Messages
Shift to P (if equipped)
This message is displayed if you try to
turn off the vehicle without the shift
button in the P (Park) position.
If this occurs, the Engine Start/Stop
button turns to the ACC position.
Low key battery (if equipped)
When the Engine Start/Stop button
is pressed to turn OFF the engine,
this message may be displayed. This
message indicates that the internal
battery of the Smart Key is low. Consider
replacing the Smart Key internal battery.
Press START button while turning
wheel (if equipped)
This message is displayed if the steering
wheel does not unlock normally when
the Engine Start/Stop button is pressed.
You should press the Engine Start/Stop
button while turning the steering wheel
right and left.
Check steering wheel lock system (if
equipped)
This message is displayed if the steering
wheel does not lock normally while the
Engine Start/Stop button is pressed to
the OFF position.