2021 HYUNDAI SANTA FE check engine

01
1-5
Gasoline engine
Unleaded
Your new vehicle is designed to use only unleaded fuel having an octane number
((R+M)/2) of 87 (Research Octane Number 91) or higher. (Do not use methanol blended
fuels)
Your new vehicle is designed to obtain maximum performance with UNLEADED FUEL,
as well as minimize exhaust emissions and spark plug fouling.
NOTICE
To prevent damage to the engine and engine components, never add any fuel
system cleaning agents to the fuel tank other than what has been specified.
Consult an authorized HYUNDAI dealer for additional information.
WARNING
•Do not “top off” after the nozzle automatically shuts off when refueling.
• Always check that the fuel cap is installed securely to prevent fuel spillage in the
event of an accident.
Gasoline containing alcohol and methanol
Gasohol, a mixture of gasoline and ethanol (also known as grain alcohol) are being
marketed along with or instead of leaded or unleaded gasoline. For example, “E15” is a
gasohol comprised of 15% ethanol and 85% gasoline.
Do not use gasohol containing more than 15% ethanol, and do not use gasoline or
gasohol containing any methanol. Either of these fuels may cause drivability problems
and damage to the fuel system, engine control system and emission control system.
Discontinue using gasohol of any kind if drivability problems occur.
“E85” fuel is an alternative fuel comprised of 85 percent ethanol and 15 percent
gasoline, and is manufactured exclusively for use in Flexible Fuel Vehicles. “E85” is
not compatible with your vehicle. Use of “E85” may result in poor engine performance
and damage to your vehicle’s engine and fuel system. HYUNDAI recommends that
customers do not use fuel with an ethanol content exceeding 15 percent.
NOTICE
To prevent damage to your vehicle’s engine and fuel system:
•Never use gasohol which contains methanol.
• Never use gasohol containing more than 15% ethanol.
• Never use leaded fuel or leaded gasohol.
• Never use “E85” fuel.
Your New Vehicle Limited Warranty does not cover damage to the fuel system or any
performance problems caused by the use of “E85” fuel.
FUEL REQUIREMENTS

Vehicle Information, Consumer Information and Reporting Safety Defects
2-14
Recommended SAE viscosity number
CAUTION
Always be sure to clean the area around any filler plug, drain plug, or dipstick before
checking or draining any lubricant. This is especially important in dusty or sandy
areas and when the vehicle is used on unpaved roads. Cleaning the plug and dipstick
areas will prevent dirt and grit from entering the engine and other mechanisms that
could be damaged.
Engine oil viscosity (thickness) has an effect on fuel economy and cold weather
operating (engine start and engine oil flowability). Lower viscosity engine oils can
provide better fuel economy and cold weather performance, however, higher viscosity
engine oils are required for satisfactory lubrication in hot weather. Using oils of any
viscosity other than those recommended could result in engine damage.
When choosing an oil, consider the range of temperature your vehicle will be operated
in before the next oil change. Proceed to select the recommended oil viscosity from
the chart.
Temperature Range for SAE Viscosity Numbers
Temperature °C
-30-20-10 0 10 20 30 40 50
(°F) -100 20 40 60 80 100 120
Engine Oil *
1
Smartstream
G2.5 GDI0W-20 0W-20
Smartstream
G2.5 T-GDI0W-30
*1 : Requires grade engine oil. If a lower grade
engine oil (mineral oil including Semi-synthetic) is used, then the engine oil and engine
oil filter must be replaced as indicated for severe maintenance condition.
An engine oil displaying this API Certification Mark conforms to
the international Lubricant Specification Advisory Committee
(ILSAC). It is recommended to only use engine oils that uphold
this API Certification Mark.

03
3-21
• Each time you push the switch, the
airflow changes as follows:
OFF
LOW ( )HIGH ( )
MIDDLE ( )
• When pressing the switch for
more than 1.5 seconds with the
air ventilation seat operating, the
operation will turn OFF.
• The air ventilation seats defaults
to the OFF position whenever the
ignition switch is placed to the ON
position.
• Auto Comfort Control (for driver’s
seat) (if equipped)
- The air ven

tilation seats
automatically controls the seat
temperature depending on the
ambient temperature and the set
climate control temperature when
the engine is running. If the air
ventilation seats switch is pushed,
the air ventilation seats will have to
be controlled manually.
To use this function, it must be
activated from the Settings menu in
the AV/AVN system screen.
- The air ven

tilation seats defaults
to the OFF position whenever the
ignition switch is ON. However, if
the Auto Comfort Control function
is ON, the air ventilation seats will
turn on and off depending on the
ambient temperature and the set
climate control temperature.
For more details, refer to the separately
supplied Infotainment manual with
your vehicle.
Rear Occupant Alert (ROA) (if
equipped)
Rear Occupant Alert is provided to help
prevent the driver from leaving the
vehicle with the rear passenger left in the
vehicle.
System setting
To use Rear Occupant Alert, it must be
enabled from the Settings menu in the
infotainment system screen. Select:
- Setup → V

ehicle
Se
ttings
→ Conv

enience
→ R
ear
Occupan
t
Alert
F

or detailed information, scan the QR
code in the separately supplied simple
manual.
System operation
• First alert
When you open the front door after
opening and closing the rear door and
turning off the engine, the ‘Check rear
seats’ warning message appears on
the cluster.
• Second alert
After the first alert, the second alert
operates when any movement is
detected in the vehicle after the
driver’s door is closed and all the
doors are locked. The horn will sound
for approximately 25 seconds. If
the system continues to detect a
movement, the alert operates up to 8
times.
Unlock the doors with the smart key
to stop the alert.
• The system detects movement in the
vehicle for 8 hours after the door is
locked.
• The second alert is activated only after
the prior activation of the first alert.

Seats & Safety System
3-50
How does the air bags system
operate?
OTMH030008N
The SRS consists of the following
components:
(1)
Driver's fr
ont air bag module
(2)
Passenger's fr

ont air bag module
(3)
Side air bag modules
(4)
Curtain air bag modules
(5)
Re

tractor pre-tensioner
(6)
Air bag warning ligh

t
(7)
SRS contr

ol module (SRSCM)/
Rollover sensor
(8)
Fr

ont impact sensors
(9)
Side impact sensors
(10) Side pressure sensors
(11) Seat belt buckle sensor
(12) Emergency fastening device system
(13) Occupant classification system
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 warning 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.
We recommend that an authorized
HYUNDAI dealer inspect the SRS
as soon as possible if any of these
conditions occur.

AUTO STOP indicator light ........................................................................\
..............4-20
T urn signal indicator light ........................................................................\
................. 4-
21
High beam indicator light
........................................................................\
................ 4-

21
High Beam Assist indicator light
........................................................................\
...... 4-

21
Cruise Indicator Light
........................................................................\
....................... 4-

21
SPORT Mode Indicator Light
........................................................................\
........... 4-

22
ECO Mode Indicator Light
........................................................................\
............... 4-

22
SMART Mode Indicator Light
........................................................................\
.......... 4-22
Mas

ter warning light
........................................................................\
........................ 4-

22
LCD display messages
........................................................................\
....................... 4-

23
Shift to P (for smart key system)
........................................................................\
..... 4-

23
Low key battery (for smart key system).................................................................. 4-23
Press START button while turning wheel (for smart key system)
......................... 4-

23
Check steering wheel lock system
(for smart key system)
........................................................................\
..................... 4-

23
Press brake pedal to start engine (for smart key system)
.................................... 4-

23
Key not in vehicle (for smart key system)
............................................................... 4-23
K

ey not detected (for smart key system)................................................................ 4-23
Press START button again (for smart key system)
................................................ 4-

23
Press START button with key (for smart key system)
........................................... 4

-24
Check BRAKE SWITCH fuse (for smart key system)
............................................. 4

-24
Shift to P or N to start engine (for smart key system)
.......................................... 4

-24
Battery discharging due to external electrical devices
......................................... 4

-24
Door, Hood, Liftgate open indicator
....................................................................... 4-25
Sunr

oof open indicator
........................................................................\
.................... 4-

25
Low tire pressure
........................................................................\
............................. 4-

25
Lights
........................................................................\
................................................ 4-

26
Wiper
........................................................................\
.....................................

...........4-26
Low washer fluid
........................................................................\
.............................. 4-

26
Low fuel
........................................................................\
.....................................

.......4-26
Low engine oil
........................................................................\
.................................. 4-

26
Engine overheated / Engine has overheated
......................................................... 4-

27
Check exhaust system
........................................................................\
..................... 4-

27
Check headlight
........................................................................\
............................... 4-

27
Check turn signal
........................................................................\
............................. 4-

27
Check headlamp LED
........................................................................\
...................... 4-

27
Check Forward Collision-Avoidance Assist system
............................................... 4-

28
Check Lane Keeping Assist system
........................................................................\
4-28
Check Blind-

Spot Collision Warning system..........................................................4-28
Check Driver Attention Warning system
................................................................ 4-

28
Check High Beam Assist system
........................................................................\
..... 4-

28
Check Smart Cruise Control system
....................................................................... 4-28
4

Instrument cluster
4-10
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 you turn the ignition switch or
the Engine Start/Stop button to the
ON position.
- It illuminat

es for approximately 3~6
seconds and then goes off.
• When there is a malfunction with the
SRS.
In this case, we recommend that
you have the vehicle inspected by an
authorized HYUNDAI dealer.
Parking brake & Brake fluid
warning light
This warning light illuminates:
• When you set the ignition switch or
the Engine Start/Stop button to the
ON position.
- The parking brak

e & brake fluid
warning 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 ligh

t illuminates
with the parking brake released, it
indicates the brake fluid level in the
reservoir is low.
If the brake fluid level in the reservoir is
low:
1.
Drive car

efully to the nearest safe
location and stop your vehicle.
2.
With the engine st

opped, 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. We recommend
that you have the vehicle inspected by
an authorized HYUNDAI dealer.

Instrument cluster
4-12
WARNING
Electronic Brake Force Distribution
(EBD) system warning light
When both ABS and Parking Brake &
Brake Fluid warning lights are on, the
brake system will not work normally
and you may experience an unexpected
and dangerous situation during sudden
braking.
If this occurs, avoid high speed driving
and abrupt braking.
We recommend that you have the
vehicle inspected by an authorized
HYUNDAI dealer as soon as possible.
NOTICE
Electronic Brake Force Distribution
(EBD) system warning light
When the ABS warning light is on
or both ABS and Parking Brake &
Brake Fluid warning lights are on, the
speedometer, odometer, or tripmeter
may not work. Also, the EPS warning
light may illuminate and the steering
effort may increase or decrease.
If this occurs, we recommend that
you have the vehicle inspected by an
authorized HYUNDAI dealer as soon as
possible.
Electric Power Steering (EPS)
warning light
This warning light illuminates:
• When you set the ignition switch or
the Engine Start/Stop button to the
ON position.
- The electric pow

er steering warning
light illuminates for about 3 seconds
and then goes off.
• Whenever there is a malfunction with
the electric power steering.
If this occurs, we recommend that
you have the vehicle inspected by an
authorized HYUNDAI dealer.
Charging system warning
light
This warning light illuminates:
When there is a malfunction with either
the alternator or electrical charging
system.
If there is a malfunction with either the
alternator or electrical charging system:
1.
Drive car

efully to the nearest safe
location and stop your vehicle.
2.
Turn the engine o

ff and check the
alternator drive belt for looseness or
breakage.
If the belt is adjusted properly, there
may be a problem in the electrical
charging system.
If this occurs, we recommend that
you have the vehicle inspected by an
authorized HYUNDAI dealer as soon
as possible.

04
4-13
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 car
efully to the nearest safe
location and stop your vehicle.
2.
Turn the engine o

ff and check the
engine oil level (For more details,
refer to “Engine Oil” section in
chapter 2). If the level is low, add oil
as required.
If the warning light remains on after
adding oil or if oil is not available, we
recommend that you have the vehicle
inspected by an authorized HYUNDAI
dealer as soon as possible.
NOTICE
• If the engine does not stop
immediately after the Engine Oil
Pressure warning light is illuminated,
severe damage could result.
• If the warning light stays on while the
engine is running, it indicates that
there may be serious engine damage
or malfunction. In this case:
1.
St

op the vehicle as soon as it is
safe to do so.
2.
Turn o

ff the engine and check the
oil level. If the oil level is low, fill
the engine oil to the proper level.
3.
Start the engine again. I

f the
warning light stays on after the
engine is started, turn the engine
off immediately. If this occurs,
we recommend that you have
the vehicle inspected by an
authorized HYUNDAI dealer.
Low fuel level warning light
This warning light illuminates:
When the fuel tank is nearly empty.
Add fuel as soon as possible.
NOTICE
Driving with the Low Fuel Level warning
light on or with the fuel level below “E
or 0” can cause the engine to misfire
and damage the catalytic converter.
Malfunction Indicator Lamp
(MIL)
This indicator light illuminates:
• When you set the ignition switch or
the Engine Start/Stop button to the
ON position.
- The malfunction indicat

or light
illuminates for about 3 seconds and
then goes off.
• Whenever there is a malfunction with
either the emission control system or
the engine or the vehicle powertrain.
If this occurs, we recommend that
you have the vehicle inspected by an
authorized HYUNDAI dealer.
NOTICE
Driving with the Malfunction Indicator
Lamp (MIL) on may cause damage to
the emission control system which
could affect drivability and/or fuel
economy.
NOTICE
If the Malfunction Indicator Lamp
(MIL) illuminates, potential catalytic
converter damage is possible which
could result in loss of engine power.
If this occurs, we recommend that
you have the vehicle inspected by an
authorized HYUNDAI dealer as soon as
possible.