2023 GENESIS G90 check engine

8-3
08
If You Have a Flat Tire While
Driving
If a tire goes flat while you are driving:
• Take your foot off the accelerator
pedal and let the vehicle slow down
while driving straight ahead. Do not
apply the brakes immediately or
attempt to pull off the road as this
may cause loss of vehicle control
resulting in an accident. When the
vehicle has slowed to such a speed
that it is safe to do so, brake carefully
and pull off the road. Drive off the
road as far as possible and park on
firm, level ground. If you are on a
divided highway, do not park in the
median area between the two traffic
lanes.
• When the vehicle is stopped, press the
hazard warning flasher button, shift
the gear to P (Park), apply the parking
brake, and press the Engine Start/Stop
button to the OFF position.
• Have all passengers get out of the
vehicle. Be sure they all get out on the
side of the vehicle that is away from
traffic.
• When changing a flat tire, follow the
instructions provided later in this
chapter.
IF THE ENGINE WILL NOT
START
• Be sure to shift the gear to N (Neutral)
or P (Park). The engine starts only
when the gear is in N (Neutral) or P
(Park).
• Turn on the interior light. If the light
dims or goes out when you operate
the starter, the battery is drained.
See instructions for “Jump Starting”
provided in this chapter.
• Check the fuel level and add fuel if
necessary.
If the vehicle still does not start, call an
authorized retailer of Genesis Branded
products for assistance.
NOTICE
Push or pull starting the vehicle may
cause the catalytic converter to
overload which can lead to damage to
the emission control system.
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8-6
Emergency Situations
10. Start the engine of the assisting
vehicle and let it run at approximately
2,000 RPM for a few minutes. Then
start your vehicle.
11. Keep your vehicle operating for at
least 30 minutes at idle or driving to
assure your battery receives enough
charge to be able to start on its
own after the vehicle is shut off. A
completely discharged battery may
require as long as 60 minutes runtime
to fully recharge it. If the vehicle is run
for less, the vehicle may not restart.
If your vehicle will not start after a few
attempts, it probably requires service.
In this event please seek qualified
assistance. If the cause of your battery
discharging is not apparent, have your
vehicle checked by an authorized retailer
of Genesis Branded products.
Disconnect the jumper cables in the
exact reverse order you connected them:
1. Disconnect the jumper cable from the
black, negative (-) chassis ground of
your vehicle P.
2. Disconnect the other end of the
jumper cable from the black, negative
(-) battery/chassis ground of the
assisting vehicle O.
3. Disconnect the second jumper cable
from the red, positive (+) battery/
jumper terminal of the assisting
vehicle N.
4. Disconnect the other end of the
jumper cable from the red, positive (+)
jumper terminal of your vehicle M.
Information
An inappropriately disposed
battery can be harmful to
the environment and human
health. Dispose of the battery
according to your local law(s) or
regulations.
NOTICE
To prevent damage to your vehicle:
• Only use a 12-volt power supply
(battery or jumper system) to jump
start your vehicle.
• Do not attempt to jump start your
vehicle by push-starting.
WARNING
While jump starting your vehicle, avoid
the positive (+) and negative (-) cables
to come in contact. A spark could cause
personal injury.
WARNING
48 V lithium battery (if equipped)
Do not jump start another vehicle.
The 48 V lithium polymer type battery
installed in your vehicle will be
damaged.
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8-7
08
If your temperature gauge indicates
overheating, you experience a loss of
power, or hear loud pinging or knocking,
the engine may be overheating. If this
happens, you should:
1. Pull off the road and stop as soon as it
is safe to do so.
2. Shift the gear to P (Park) and set the
parking brake. If the air conditioning is
ON, turn it OFF.
3. If engine coolant is running out under
the vehicle or steam is coming out
from the hood, stop the engine. Do
not open the hood until the coolant
has stopped running or the steaming
has stopped. If there is no visible
loss of engine coolant and no steam,
leave the engine running and check
to be sure the engine cooling fan is
operating. If the fan is not running,
turn the engine off.
WARNING
While the engine is running,
keep hands, clothing and tools
away from the moving parts
such as the cooling fan and
drive belt to prevent serious
injury.
4. Check for coolant leaking from the
radiator, hoses or under the vehicle. (If
the air conditioning had been in use, it
is normal for cold water to be draining
from it when you stop.)
5. If engine coolant is leaking out, stop
the engine immediately and call the
nearest authorized retailer of Genesis
Branded products for assistance.
WARNING
Never remove the engine
coolant cap and/or liquid-
cooled intercooler coolant
cap or the drain plug while the
engine and radiator are hot.Hot coolant and steam may blow out
under pressure, causing serious injury.
Turn the engine off and wait until the
engine cools down. Use extreme care
when removing the radiant cap or
coolant cap. Wrap a thick towel around
it, and turn it counterclockwise slowly
to the first stop. Step back while the
pressure is released from the cooling
system. When you are sure all the
pressure has been released, press down
on the cap, using a thick towel, and
continue turning counterclockwise to
remove it.
6. If you cannot find the cause of the
overheating, wait until the engine
temperature has returned to normal.
Then, if coolant has been lost,
carefully add coolant to the reservoir
to bring the fluid level in the reservoir
up to the halfway mark.
7. Proceed with caution, keeping alert
for further signs of overheating. If
overheating happens again, call an
authorized retailer of Genesis Branded
products for assistance.
CAUTION
• Serious loss of coolant indicates a
leak in the cooling system and should
be checked as soon as possible by
an authorized retailer of Genesis
Branded products.
• When the engine overheats from
low engine coolant, suddenly
adding engine coolant may cause
cracks in the engine. To prevent
damage, add engine coolant slowly
in small quantities. It may require
several refilling cycles to properly
fill the engine cooling system. If
necessary, an authorized retailer of
Genesis Branded products should be
consulted to perform this task.
IF THE ENGINE OVERHEATS
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8-9
08
Tire Pressure Monitoring System
WARNING
Over-inflation or under-inflation can
reduce tire life, adversely affect vehicle
handling, and lead to sudden tire failure
that may cause loss of vehicle control
resulting in an accident.
Each tire, including the spare (if
provided), should be checked monthly
when cold and inflated to the inflation
pressure recommended by the vehicle
manufacturer on the vehicle placard
or tire inflation pressure label. (If your
vehicle has tires of a different size than
the size indicated on the vehicle placard
or tire inflation pressure label, you should
determine the proper tire inflation
pressure for those tires.)
As an added safety feature, your
vehicle has been equipped with a tire
pressure monitoring system (TPMS)
that illuminates a low tire pressure
telltale when one or more of your tires is
significantly under-inflated. Accordingly,
when the low tire pressure telltale
illuminates, you should stop and check
your tires as soon as possible, and inflate
them to the proper pressure. Driving on
a significantly under-inflated tire causes
the tire to overheat and can lead to tire
failure.
Under-inflation also reduces fuel
efficiency and tire tread life, and may
affect the vehicle’s handling and
stopping ability.
Please note that the TPMS is not a
substitute for proper tire maintenance,
and it is the driver’s responsibility to
maintain correct tire pressure, even if
under-inflation has not reached the level
to trigger illumination of the TPMS low
tire pressure telltale.
Your vehicle has also been equipped with
a TPMS malfunction indicator to indicate
when the system is not operating
properly. The TPMS malfunction
indicator is combined with the low
tire pressure telltale. When the system
detects a malfunction, the telltale will
flash for approximately one minute and
then remain continuously illuminated.
This sequence will continue upon
subsequent vehicle start-ups as long as
the malfunction exists.
When the malfunction indicator is
illuminated, the system may not be able
to detect or signal low tire pressure as
intended. TPMS 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 from functioning
properly.
Always check the TPMS malfunction
telltale after replacing one or more tires
or wheels on your vehicle to ensure that
the replacement or alternate tires and
wheels allow the TPMS to continue to
function properly.
NOTICE
If any of the below happens, have
the system checked by an authorized
retailer of Genesis Branded products.
1. The Low Tire Pressure Telltale/ TPMS
Malfunction Indicator does not
illuminate for 3 seconds when the
Engine Start/Stop button is pressed
to the ON position or when the
engine is running.
2. The TPMS Malfunction Indicator
remains illuminated after blinking for
approximately 1 minute.
3. The Low Tire Pressure Position
Telltale remains illuminated.
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8-24
Emergency Situations
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4. Unscrew the valve cap from the valve
of the defective wheel and screw the
filling hose O of the sealant bottle
onto the valve.
CAUTION
Securely install the sealant filling hose
to the valve. If not, sealant may flow
backward, possibly clogging the filling
hose.
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5. Plug the compressor power cord P
into the vehicle power outlet.
NOTICE
Only use the front passenger side
power outlet when connecting the
power cord.6. With the Engine Start/Stop button
in the ON position, switch on
the compressor and let it run for
approximately 5~7 minutes to fill the
sealant up to proper pressure. (refer
to the Tire and Wheels, chapter 2).
The inflation pressure of the tire after
filling is unimportant and will be
checked/ corrected later. Be careful
not to overinflate the tire and stay
away from the tire when filling it.
CAUTION
Tire pressure
Do not attempt to drive your vehicle if
the tire pressure is below 200 kPa (29
psi). This could result in an accident due
to sudden tire failure.
WARNING
Carbon monoxide
Do not leave your vehicle running in
a poorly ventilated area for extended
periods of time. Carbon monoxide
poisoning and suffocation can occur.
7. Switch off the compressor.
8. Detach the hoses from the sealant
bottle connector and from the tire
valve.
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8-30
Emergency Situations
Emergency Towing
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A : Front,
B : Rear
If towing is necessary, we recommend
you have it done by an authorized
retailer of Genesis Branded products or a
commercial tow truck service.
If towing service is not available in
an emergency, your vehicle may be
temporarily towed using a cable or chain
secured to the emergency towing hook
at the front (or rear) of the vehicle.
Use extreme caution when towing the
vehicle with a cable or chain. A driver
must be in the vehicle to steer it and
operate the brakes.
Towing in this manner may be done
only on hard-surfaced roads for a short
distance and at low speeds. Also, the
wheels, axles, power train, steering
and brakes must all be in good working
condition.
CAUTION
The driver must be in the vehicle for
steering and braking operations when
the vehicle is being towed. Passengers
other than the driver must not be in the
vehicle.
Always follow these emergency towing
precautions:
• Press the Engine Start/Stop button
to the ACC position so the steering
wheel is not locked.
• Shift the gear to N (Neutral).
• Release the parking brake.
• Depress the brake pedal with more
force than normal as you will have
reduced braking performance.
• More steering effort will be required
because the power steering system
will be disabled.
• Use a vehicle heavier than your own to
tow your vehicle.
• The drivers of both vehicles should
communicate with each other
frequently.
• Before emergency towing, check that
the hook is not broken or damaged.
• Fasten the towing cable or chain
securely to the hook.
• Do not jerk the hook. Apply steady
and even force.
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9
9. Maintenance
Engine Compartment ....................................................................................... 9-3
Maintenance Services ...................................................................................... 9-4
Owner’s Responsibility ............................................................................................... 9-4
Owner Maintenance Precautions ............................................................................... 9-4
Owner Maintenance ......................................................................................... 9-5Owner Maintenance Schedule ................................................................................... 9-6
Scheduled Maintenance Services ....................................................................9-7Normal Maintenance Schedule .................................................................................. 9-8
Maintenance Under Severe Usage Conditions ......................................................... 9-11
Explanation of Scheduled Maintenance Items .............................................. 9-13
Engine Oil ......................................................................................................... 9-15
Checking the Engine Oil Level ................................................................................... 9-15
Checking the Engine Oil and Filter ............................................................................9-17
Engine Coolant/Liquid-Cooled Intercooler Coolant .....................................9-18Checking the Coolant Level....................................................................................... 9-18
Changing Coolant ..................................................................................................... 9-20
Brake Fluid ........................................................................................................ 9-21Checking the Brake Fluid Level ................................................................................. 9-21
Washer Fluid .................................................................................................... 9-22Checking the Washer Fluid Level .............................................................................. 9-22
Air Cleaner ....................................................................................................... 9-23
Filter Replacement ..................................................................................................... 9-23
Cabin Air Filter ................................................................................................. 9-24Filter Inspection..........................................................................................................9-24
Filter Replacement .....................................................................................................9-24
Wiper Blades ................................................................................................... 9-26Blade Inspection ........................................................................................................9-26
Blade Replacement ....................................................................................................9-26
Battery ............................................................................................................. 9-28Battery Usage Recommendations ............................................................................9-29
Battery Replacement ................................................................................................ 9-30
Battery Recharging .................................................................................................... 9-31
Reset Items ................................................................................................................. 9-32

9
Tires and Wheels ............................................................................................. 9-33Tire Care ......................................................................................................................9-33
Recommended Cold Tire Inflation Pressures ...........................................................9-33
Check tire Inflation Pressure .....................................................................................9-34
Tire Rotation ...............................................................................................................9-35
Wheel Alignment and Tire Balance ...........................................................................9-36
Tire Replacement .......................................................................................................9-36
Wheel Replacement ................................................................................................... 9-37
Tire Traction ................................................................................................................ 9-37
Tire Maintenance........................................................................................................ 9-37
Tire Sidewall Labeling ............................................................................................... 9-38
Tire Terminology and Definitions .............................................................................. 9-41
All Season Tires .......................................................................................................... 9-44
Snow Tires.................................................................................................................. 9-44
Radial-Ply Tires .......................................................................................................... 9-44
Low Aspect Ratio Tires .............................................................................................. 9-45
Fuses ................................................................................................................9-46Instrument Panel Fuse Replacement ........................................................................9-47
Engine Compartment Panel Fuse Replacement ..................................................... 9-48
Fuse/Relay Panel Description................................................................................... 9-49
Light Bulbs ....................................................................................................... 9-62Headlight, Parking Lamp, Turn Signal Lamp, Daytime Running Light (DRL)
Replacement ............................................................................................................. 9-63
Side Repeater Lamp Replacement .......................................................................... 9-63
Puddle Lamp Replacement ...................................................................................... 9-63
Rear Combination Lamp Replacement ................................................................... 9-64
High Mounted Stop Lamp Replacement ................................................................. 9-64
License Plate Lamp Replacement ............................................................................ 9-65
Interior light replacement ......................................................................................... 9-65
Appearance Care ............................................................................................ 9-67Exterior Care ...............................................................................................................9-67
Interior Care ................................................................................................................ 9-7 2
Emission Control System ................................................................................ 9-76Crankcase Emission Control System ........................................................................ 9-76
Evaporative Emission Control System Including Onboard Refueling Vapor
Recovery (ORVR) ........................................................................................................ 9-76
Exhaust Emission Control System ............................................................................. 9-77
California Perchlorate Notice ......................................................................... 9-78