2018 Hyundai Sonata Plug-in Hybrid engine

6-31
What to do in an emergency
6
When towing your vehicle in an
emergency without wheel dollies :
1. Place the Engine Start/Stop but-ton in the ACC position.
2. Place the shift lever in N (Neutral).
3. Release the parking brake.Removable towing hook
1. Open the trunk, and take the tow- ing hooks out from the tool case. 2. Open the cover by pressing the
lower part on the front bumper.
3. Install the towing hook by rotating it in a clock-wise direction until it is
securely installed.
4. After use, remove the towing hook and close the cover.
Failure to place the transmis-
sion shift lever in N (Neutral)
may cause internal damage to
the transmission.
CAUTION
OLF067025OLFH064024
OLFP065024
■Hybrid
■Plug-in hybrid

6-32
What to do in an emergency
Emergency Towing
(if equipped)
If towing is necessary, we recom-
mend you to have it done by an
authorized HYUNDAI dealer 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 tow-
ing hook at the 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 should be done only on a
solid ground for a short distance and
at a low speed.
Also, the wheels, axles, power train,
steering and brakes must all be in
good condition.
Always follow these emergency tow-
ing precautions:
Place the Engine Start/Stop button
in the ACC position so the steering
wheel is not locked.
Place the shift lever in N (Neutral).
Release the parking brake.
Depress the brake pedal with more force than normal since you will
have reduced braking perform-
ance.
More steering effort will be required because the power steer-
ing 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 fre-
quently.
Before emergency towing, check that the hook is not broken or dam-
aged.
Fasten the towing cable or chain securely to the hook.
Do not jerk the hook. Apply steady and even force.
OLF067026
OLF067027
■Front
■Rear

7
Maintenance
7
Maintenance
Engine compartment .............................................7-3
Maintenance services ...........................................7-4
Owner's responsibility ......................................................7-4
Owner maintenance precautions ..................................7-4
Owner maintenance ...............................................7-5
Owner maintenance schedule ........................................7-6
Scheduled maintenance services.........................7-8
Normal maintenance schedule .......................................7-9
Maintenance under severe usage conditions ..........7-12
Severe driving conditions..............................................7-13
Explanation of scheduled maintenance
items.......................................................................7\
-14
Engine oil ..............................................................7-17
Checking the engine oil level .......................................7-17
Checking the engine oil and filter ..............................7-18
Engine coolant/inverter coolant .......................7-19
Checking the engine/inverter coolant level .............7-19
Changing engine coolant...............................................7-22
Hybrid starter & generator (HSG) belt.............7-22
Checking the hybrid starter &
generator (HSG) belt ......................................................7-22
Brake fluid ............................................................7-23
Checking the brake fluid level .....................................7-23
Washer fluid .........................................................7-24
Checking the washer fluid level ..................................7-24
Parking brake .......................................................7-24
Checking the parking brake .........................................7-24
Air cleaner ............................................................7-25
Filter replacement ...........................................................7-25
Climate control air filter .....................................7-27
Filter inspection ...............................................................7-27
Wiper blades .........................................................7-29
Blade inspection ..............................................................7-29
Blade replacement ..........................................................7-29
Battery...................................................................7-31
For best battery service................................................7-32
Battery recharging .........................................................7-32
Reset features .................................................................7-33
Tires and wheels ..................................................7-34
Tire care ........................................................................\
....7-34
Recommended cold tire inflation pressures.............7-35
Check tire inflation pressure........................................7-36
Tire rotation .....................................................................7-3\
7
Wheel alignment and tire balance ..............................7-38
Tire replacement .............................................................7-38
7

7
Wheel replacement .........................................................7-39
Tire traction ......................................................................7-\
39
Tire maintenance ............................................................7-40
Tire sidewall labeling ......................................................7-40
Tire terminology and definitions.................................7-44
All season tires ................................................................7-47
Summer tires ....................................................................7-47\
Snow tires ........................................................................\
.7-47
Radial-ply tires ................................................................7-48
Low aspect ratio tires ....................................................7-48
Fuses ......................................................................7-\
50
Instrument panel fuse replacement ...........................7-51
Engine compartment panel fuse replacement.........7-52
Fuse/relay panel description .......................................7-54
Light bulbs.............................................................7-67
Headlamp, parking lamp, turn signal lamp and
side marker light bulb replacement ............................7-68
Side repeater lamp replacement .................................7-71
Rear combination light bulb replacement .................7-72
High mounted stop lamp ...............................................7-74
License plate light bulb replacement .........................7-74
Interior light bulb replacement ....................................7-74
Appearance care ..................................................7-76
Exterior care ....................................................................7-76\
Interior care......................................................................7-\
81
Emission control system .....................................7-84
Crankcase emission control system ...........................7-84
Evaporative emission control system including
onboard refueling vapor recovery (ORVR) ..............7-84
Exhaust emission control system ...............................7-85
California perchlorate notice .............................7-88

7-3
7
Maintenance
E
EN
N G
GI
IN
N E
E
C
C O
O M
M P
PA
A R
RT
TM
M E
EN
N T
T

1. Engine oil filler cap
2. Engine oil dipstick
3. Radiator cap
4. Engine coolant reservoir
5. Brake fluid reservoir
6. Air cleaner
7. Inverter coolant reservoir
8. Windshield washer fluid reservoir
9. Fuse box
The actual engine compartment the vehicle
may differ from the illustration.
OLFH017005

7-5
7
Maintenance
O
OW
W N
NE
ER
R
M
M A
AI
IN
N T
TE
EN
N A
AN
N C
CE
E
The following lists are vehicle checks
and inspections that should be per-
formed by the owner or an author-
ized HYUNDAI dealer at the frequen-
cies indicated to help ensure safe,
dependable operation of your vehi-
cle.
Any adverse conditions should be
brought to the attention of your deal-
er as soon as possible.
These Owner Maintenance vehicle
checks are generally not covered by
warranties and you may be charged
for labor, parts and lubricants used.
Performing maintenance work
on a vehicle can be dangerous.
If you lack sufficient knowledge
and experience or the proper
tools and equipment to do the
work, have it done by an author-
ized HYUNDAI dealer. ALWAYS
follow these precautions for
performing maintenance work:
Park your vehicle on level
ground, move the shift lever
into the P (Park, for automatic
transmission vehicle) posi-
tion, apply the parking brake,
place the Engine Start/Stop
button in the OFF position.
Block the tires (front and back)
to prevent the vehicle from
moving.
Remove loose clothing or jew-
elry that can become entan-
gled in moving parts.
(Continued)
WARNING (Continued)
If you must run the engine
during maintenance, do so
out doors or in an area with
plenty of ventilation.
Keep flames, sparks, or smok-
ing materials away from the
battery and fuel-related parts.
When you open the engine
hood, turn the hybrid system
off. If not, It may result in death
or serious injury because of
the high voltage flow.

7-6
Maintenance
Owner maintenance schedule
When you stop for fuel:
Check the engine oil level.
Check coolant level in the enginecoolant reservoir.
Check the windshield washer fluid level.
Check for low or under-inflated tires.
While operating your vehicle:
Note any changes in the sound ofthe exhaust or any smell of
exhaust fumes in the vehicle.
Check for vibrations in the steering wheel. Notice if there is any
increased steering effort or loose-
ness in the steering wheel, or
change in its straight-ahead posi-
tion.
Notice if your vehicle constantly turns slightly or "pulls" to one side
when traveling on smooth, level
road.
When stopping, listen and check for unusual sounds, pulling to one
side, increased brake pedal travel
or "hard-to-push" brake pedal.
If any slipping or changes in the operation of your transmission
occurs, check the transmission
fluid level.
Check the automatic transmission P (Park) function.
Check the parking brake.
Check for fluid leaks under your vehicle (water dripping from the air
conditioning system during or after
use is normal).
At least monthly:
Check coolant level in the enginecoolant reservoir.
Check the operation of all exterior lights, including the stoplights, turn
signals and hazard warning flashers.
Check the inflation pressures of all tires including the spare for tires
that are worn, show uneven wear,
or are damaged.
Check for loose wheel lug nuts.
Be careful when checking your
engine coolant level when the
engine is hot. This may result in
coolant being blown out of the
opening and cause serious
burns and other injuries.
WARNING

7
Maintenance
7-9
Normal Maintenance Schedule
The following maintenance services must be performed to ensure good emission control and performance.
Keep receipts for all vehicle emission services to protect your warranty. Where both mileage and time are shown, the
frequency of service is determined by whichever occurs first.
Number of months or driving distance, whichever comes first
Months1224364860728496108120132144156168180
Miles7.51522.53037.54552.56067.575839098105113
Km1224364860728496108120132144156168180
HSG belts *1Inspect every 7,500 miles or 12 months,
and replace every 67,500 miles or 48 months
Engine oil and engine oil filterRRRRRRRRRRRRRRR
Fuel additives *2Add fuel additives every 7,500 miles or 12months
Air cleaner filterIIIRIIIRIIIRIII
Spark plugsReplace every 97,500 miles
Rotate tiresRotate tires every 7,500 miles
Climate control air filterReplace every 15,000 miles or 12 months
Vacuum hoseIIIIIIIIIIIIIII
Engine coolant / Inverter coolantAt first, replace at 120,000 miles or 10 years :
after that, replace every 30,000 miles or 24 months
MAINTENANCE INTERVALS
MAINTENANCE
ITEM
I : Inspect and if necessary, adjust, correct, clean or replace.
R : Replace or change.
*
1: The drive belt should be replaced when cracks occur or tension is reduced excessively.
*2: If TOP TIER Detergent Gasoline is not available, one bottle of additive is recommended. Additives are available from your authorized HYUNDAI dealer along with information on how to use them. Do not mix other additives.