2018 Hyundai Ioniq Hybrid check engine light

3-41
Convenient features of your vehicle
Information
Make sure to refuel your vehicle
according to the "Fuel Requirements"
suggested in the Introduction chapter.
• Do not spill fuel on the exterior
surfaces of the vehicle. Any type
of fuel spilled on painted sur-
faces may damage the paint.
• If the fuel filler cap requires
replacement, use only a genuine
HYUNDAI cap or the equivalent
specified for your vehicle. An
incorrect fuel filler cap can
result in a serious malfunction
of the fuel system or emission
control system.
NOTICE
i3
(Continued)
•When refueling, always move
the shift lever to the P (Park)
position, set the parking
brake, and place the ignition
switch to the LOCK/OFF posi-
tion. Sparks produced by
electrical components related
to the engine can ignite fuel
vapors causing a fire.
•When using an approved
portable fuel container, be sure
to place the container on the
ground prior to refueling. Static
electricity discharge from the
container can ignite fuel vapors
causing a fire. Once refueling
has begun, contact between
your bare hand and the vehicle
should be maintained until the
filling is complete.
•Use only approved portable
plastic fuel containers designed
to carry and store gasoline.
(Continued)
(Continued)
•Do not use matches or a
lighter and do not smoke or
leave a lit cigarette in your
vehicle while at a gas station,
especially during refueling.
•Do not over-fill or top-off your
vehicle tank, which can cause
gasoline spillage.
•If a fire breaks out during refu-
eling, leave the vicinity of the
vehicle, and immediately con-
tact the manager of the gas
station and then contact the
local fire department. Follow
any safety instructions they
provide.
•If pressurized fuel sprays out,
it can cover your clothes or
skin and thus subject you to
the risk of fire and burns.
Always remove the fuel cap
carefully and slowly. If the cap
is venting fuel or if you hear a
hissing sound, wait until the
condition stops before com-
pletely removing the cap.
(Continued)
(Continued)
•Always check that the fuel cap
is installed securely to prevent
fuel spillage in the event of an
accident.

3-44
Information
Make sure to refuel your vehicle
according to the "Fuel Requirements"
suggested in the Introduction chapter.
• Do not spill fuel on the exterior
surfaces of the vehicle. Any type
of fuel spilled on painted sur-
faces may damage the paint.
• If the fuel filler cap requires
replacement, use only a genuine
HYUNDAI cap or the equivalent
specified for your vehicle. An
incorrect fuel filler cap can
result in a serious malfunction
of the fuel system or emission
control system.
NOTICE
i
Convenient features of your vehicle
(Continued)
•When refueling, always move
the shift lever to the P (Park)
position, set the parking
brake, and place the ignition
switch to the LOCK/OFF posi-
tion. Sparks produced by
electrical components related
to the engine can ignite fuel
vapors causing a fire.
•When using an approved
portable fuel container, be sure
to place the container on the
ground prior to refueling. Static
electricity discharge from the
container can ignite fuel vapors
causing a fire. Once refueling
has begun, contact between
your bare hand and the vehicle
should be maintained until the
filling is complete.
•Use only approved portable
plastic fuel containers designed
to carry and store gasoline.
(Continued)
(Continued)
•Do not use matches or a
lighter and do not smoke or
leave a lit cigarette in your
vehicle while at a gas station,
especially during refueling.
•Do not over-fill or top-off your
vehicle tank, which can cause
gasoline spillage.
•If a fire breaks out during refu-
eling, leave the vicinity of the
vehicle, and immediately con-
tact the manager of the gas
station and then contact the
local fire department. Follow
any safety instructions they
provide.
•If pressurized fuel sprays out,
it can cover your clothes or
skin and thus subject you to
the risk of fire and burns.
Always remove the fuel cap
carefully and slowly. If the cap
is venting fuel or if you hear a
hissing sound, wait until the
condition stops before com-
pletely removing the cap.
(Continued)
(Continued)
•Always check that the fuel cap
is installed securely to prevent
fuel spillage in the event of an
accident.

3-50
Convenient features of your vehicle
Avoid driving with an extremely
low fuel level. Running out of fuel
could cause the engine to misfire
damaging the catalytic converter.
Hybrid battery SOC
(State of Charge) gauge
This gauge indicates the remaining
hybrid battery power. If the SOC is
near the "0 or L (Low)" level, the
vehicle automatically operates the
engine to charge the battery.However, if the Service Indicator
( ) and Malfunction Indicator
Lamp (MIL) ( ) turn on when the
SOC gauge is near the "0 or L (Low)"
level, we recommend the vehicle be
checked by an authorized HYUNDAI
dealer.
Never try to start the vehicle if the
fuel tank is empty. In this condi-
tion, the engine cannot charge the
high voltage battery of the hybrid
system. If you try to start the vehi-
cle when the fuel is empty, the
high voltage battery will become
discharged and be damaged.
NOTICE
NOTICE
Running out of fuel can expose
vehicle occupants to danger.
You must stop and obtain addi-
tional fuel as soon as possible
after the warning light comes
on or when the gauge indicator
comes close to the "0 or E
(Empty)" level.
WARNING
■Hybrid vehicle
• Except Europe • For Europe
■Plug-in hybrid vehicle
• Except Europe • For EuropeOAEQ046009/OAEQ046009L
OAEPH046522/OAEPH047522L

3-55
Convenient features of your vehicle
3
Seat Belt Warning Light
This warning light informs the driver
that the seat belt is not fastened.
For more information, refer to
“Seat Belts” in chapter 2.
Parking Brake & Brake
Fluid Warning Light
This warning light illuminates:
• Once you turn the ignition switch or
the Engine Start/Stop button to the
ON position.
- It illuminates for approximately 3
seconds
- It remains on if the parking brake
is applied.
• When the parking brake is applied.
• When 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.
• When the regenerative brake does
not operate.
If the brake fluid level in the reser-
voir is low:
1. Drive carefully to the nearest safe
location and stop your vehicle.
2. With the engine stopped, check the
brake fluid level immediately and
add fluid as required (For more
information, refer to “Brake
Fluid” in chapter 7). After adding
brake fluid, check all brake compo-
nents 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.
Dual-diagonal braking system
Your vehicle is equipped with dual-
diagonal braking systems. This
means you still have braking on two
wheels even if one of the dual sys-
tems 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.
(red color)

3-59
Convenient features of your vehicle
3
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
location and stop your vehicle.
2. Turn the engine off and check the
engine oil level (For more informa-
tion, refer to “Engine Oil” in chap-
ter 7). If the level is low, add oil as
required.
If the warning light remains on
after adding oil or if oil is not avail-
able, we recommend that you
have the vehicle inspected by an
authorized HYUNDAI dealer as
soon as possible.• If the engine does not stop
immediately after the Engine Oil
Pressure Warning Light is illumi-
nated, severe damage could
result.
• If the warning light stays on
while the engine is running, it
indicates that there may be seri-
ous engine damage or malfunc-
tion. In this case:
1. Stop the vehicle as soon as it
is safe to do so.
2. Turn off 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. If the
warning light stays on after the
engine is started, turn the
engine off immediately. In this
case, 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.
Driving with the Low Fuel Level
warning light on or with the fuel
level below "0 or E" can cause the
engine to misfire and damage the
catalytic converter (if equipped).
NOTICE
NOTICE

3-67
Convenient features of your vehicle
Key not detected
(for smart key system)
This warning message is displayed if
the smart key is not detected when you
press the Engine Start/Stop button.
Press START button again
(for smart key system)
This message is displayed if you
were unable to start the vehicle when
the Engine Start/Stop button was
pressed.
If this occurs, attempt to start the
engine by pressing the Engine
Start/Stop button again.
If the warning message appears
each time you press the Engine
Start/Stop button, we recommend
that you have the vehicle inspected
by an authorized HYUNDAI dealer.
Press START button with key
(for smart key system)
This warning message is displayed if
you press the Engine Start/Stop but-
ton while the warning message “Key
not detected” is displayed.
At this time, the immobilizer indicator
light blinks.
Check BRAKE SWITCH fuse
(for smart key system)
This warning message is displayed if
the brake switch fuse is disconnected.
You need to replace the fuse with a
new one before starting the engine.
If that is not possible, you can start the
engine by pressing the Engine
Start/Stop button for 10 seconds in the
ACC position.
Shift to P to start vehicle
(for smart key system)
This warning message is displayed if
you try to start the engine with the
shift lever not in the P (Park) position.
Door, Hood, Tailgate Open
This warning is displayed indicating
which door, or hood, or tailgate is
open.
3
OAE046165
Before driving the vehicle, you
should confirm that the door/
hood/tailgate is fully closed.
Also, check there is no door
/hood/tailgate open warning light
or message displayed on the
instrument cluster.
CAUTION

3-122
Convenient features of your vehicle
• The indicator may differ from the
illustration depending on objects
or sensors status. If the indicator
blinks, we recommend that you
have your vehicle checked by an
authorized HYUNDAI dealer.
• If the audible warning does not
sound or if the buzzer sounds
intermittently when shifting into R
(Reverse) position, this may indi-
cate a malfunction with the
Parking Assist System. If this
occurs, we recommend that you
have your vehicle checked by an
authorized HYUNDAI dealer as
soon as possible.
To turn off the Rear Parking
Assist System (if equipped)
Push the button to turn off the Rear
Parking Assist System. The indicator
light on the button will turn on.
Non-operational conditions of
Parking Assist System
The Rear Parking Assist System
may not operate normally when:
• Moisture is frozen to the sensor.
• The sensor is covered with dirt or
debris such as snow or ice, or the
sensor cover is blocked.
There is a possibility of the Rear
Parking Assist System malfunction
when:
• Driving on uneven road surfaces
such as unpaved roads, gravel,
bumps, or gradient.
• Objects generating excessive noise
such as vehicle horns, loud motor-
cycle engines, or truck air brakes
can interfere with the sensor.
• Heavy rain or water spray is present.
• Wireless transmitters or mobile
phones are present near the sensor.
• The sensor is covered with snow.
• Any non-factory equipment or acces-
sories have been installed, or if the
vehicle bumper height or sensor
installation has been modified.
NOTICE
OAE046405L

5-7
Driving your vehicle
5
Key ignition switch positions
Switch
PositionActionNotes
LOCK
To turn the ignition switch to the LOCK position, put the key in at
the ACC position and turn the key towards the LOCK position.
The ignition key can be removed in the LOCK position.
The steering wheel locks to protect the vehicle from theft.
(if equipped)
ACC
Electrical accessories are usable.
The steering wheel unlocks.If difficulty is experienced turning the ignition
switch to the ACC position, turn the key
while turning the steering wheel right and
left to release.
ON
This is the normal key position when the vehicle has started.
All features and accessories are usable.
The warning lights can be checked when you turn the ignition
switch from ACC to ON.Do not leave the ignition switch in the ON
position when the vehicle is not running to
prevent the battery from discharging.
STARTTo start the vehicle, turn the ignition switch to the START position.
The switch returns to the ON position when you let go of the key.The engine will crank until you release the
key.