2010 Hyundai Sonata check engine

6
DO-IT-YOURSELF MAINTENANCE
4
G020C01A-AATVehicle InteriorThe following should be checked each
time when the vehicle is driven:
o Lights operation
o Windshield wiper operation
o Horn operation
o Defroster, heating system operation
(and air conditioning, if installed)
o Steering operation and condition
o Mirror condition and operation
o Turn signal operation
o Accelerator pedal operation
o Brake operation, including parking
brake
o Manual transaxle operation, including
clutch operation
o Automatic transaxle operation,
including "Park" mechanism operation
o Seat control condition and operation
o Seat belt condition and operation
o Sun visor operation
If you notice anything that does not operate
correctly or appears to be functioning
correctly, inspect it carefully and seek
assistance from your Hyundai dealer if
service is needed.
G020B01A-AATVehicle ExteriorThe following should be checked monthly:
o Overall appearance and condition
o Wheel condition and wheel nut torque
o Exhaust system condition
o Light condition and operation
o Windshield glass condition
o Wiper blade condition
o Paint condition and body corrosion
o Fluid leaks
o Door and hood lock condition
o Tire pressure and condition
(including spare tire)GENERAL CHECKSG020A01NF-AATEngine CompartmentThe following should be checked regu-
larly:
o Engine oil level and condition
o Transaxle fluid level and condition
o Brake fluid level
o Engine coolant level
o Windshield washer fluid level
o Accessory drive belt condition
o Engine coolant hose condition
o Fluid leaks (on or below components)
o Power steering fluid level
o Battery condition
o Air filter condition
o Engine vibration
CHECKING THE ENGINE OILG030B01O-AATRecommended OilThe engine oil quality should meet the
following classification.
API SL or SM,
ILSAC GF-3 or ABOVE
G030B01JM-U G030A01A-AAT
Engine oil is essential to the performance
and service of the engine. It is suggested
that you check the oil level at least once a
week in normal use and more often if you
are on a trip or driving in severe conditions.

6
DO-IT-YOURSELF MAINTENANCE
5
G030C01JM-AATTo Check the Oil Level
Before checking the oil, warm up the engine
to the normal operating temperature and
be sure your car is parked on level ground.
Turn the engine off.
Wait five minutes, then remove the dipstick,
wipe it off, fully reinsert the dipstick and
withdraw it again. Then note the highest
level the oil has reached on the dipstick. It
should be between the upper ("F") and
lower ("L") range.
!
WARNING:
Be very careful not to touch the radiator
hose when checking the engine oil as it
may be hot enough to burn you.
ONF078002
G030C02NF
(2.4L)
(3.3L)
NOTE:o For good fuel economy, SAE 5W-20
(5W-30), ILSAC GF-3 engine oil is
preferred.
o If SAE 5W-20, ILSAC GF-3 engine oil is
not available, a secondary recom-
mended engine oil for corresponding
temperature range can be used. See
page 9-4

6
DO-IT-YOURSELF MAINTENANCE
6
!!
G030D01O-AATAdding Oil
1. Remove the oil filler cap by turning it
counter-clockwise.
2. Add oil, then check the level again. Do
not overfill.
3. Replace the cap by turning it clockwise.
The distance between the "F" and "L" marks
is equal to about 1 quart of oil.
CAUTION:
Slowly pour the recommended oil into a
funnel. Do not overfill to avoid damage to
the engine.
WARNING:
Be very careful not to touch the radiator
hose when adding the engine oil as it may
be hot enough to burn you.
If the oil level is close to or below the "L"
mark, add oil until it reaches the "F" mark.
To add oil:
ONF078003
G030D02NF
(3.3L)(2.4L)
CHANGING THE ENGINE OIL AND
FILTERG040A02NF-AAT
HNF5005(3.3L)(2.4L)
G040A01NFOil filter
Oil filler
cap
Oil level
dipstick Oil filler
cap
Oil filter

6
DO-IT-YOURSELF MAINTENANCE
8
CHECKING AND CHANGING THE
ENGINE COOLANT!
G050A01A-AAT
WARNING:
Do not remove the radiator cap when the
engine is hot. When the engine is hot, the
engine coolant is under pressure and
may erupt through the opening if the cap
is removed. You could be seriously
burned if you do not observe this
precaution. Do not remove the radiator
cap until the radiator is cool to the touch.
!
5. Remove the oil filter by turning it counter-
clockwise with a oil filter wrench of the
proper size. A certain amount of oil will
come out when you remove the filter. So be
sure to have your drain pan in place
underneath it.
6. Install a new oil filter in accordance with the
instructions on the carton or on the filter
itself. Do not over-tighten.
Tightening torque:
8.7 ~ 11.6 lb.ft (1.2 ~ 1.6 kgf.m)
Be sure that the mounting surface on the
engine is clean and that the old gasket is
removed completely. Lubricate the new
gasket on the filter with clean engine oil
before installation.
7. Remove the engine oil level dipstick.
8. Refill the crankcase with the recommended
engine oil. Refer to the specification in
chapter 9 for engine oil capacity.
CAUTION:
Slowly pour the recommended oil into a
funnel. Do not overfill to avoid damage to
the engine.
NOTE:Always dispose of used engine oil in an
environmentally acceptable manner. It
is suggested that it be placed in a sealed
container and taken to a service station
for reclamation. Do not pour the oil on the
ground or put it into the household trash.
PROPOSITION 65 WARNING:
Engine oil contains chemicals known to
the State of California to cause cancer,
birth defects and reproductive harm.
Used engine oil may cause irritation or
cancer of the skin if left in contact with
the skin for prolonged periods of time.
Always protect your skin by washing
your hands thoroughly with soap and
warm water as soon as possible after
handling used oil.
!
9. Start the engine and check to be sure no
oil is leaking from the drain plug or oil
filter.
10. Shut off the engine and recheck the oil
level.

6
DO-IT-YOURSELF MAINTENANCE
9
G050B01A-AATRecommended Engine CoolantUse a high quality ethylene-glycol coolant
in a 50/50 mix with water. The engine
coolant should be compatible with
aluminum engine parts. Additional
corrosion inhibitors or additives should
not be used. The cooling system must be
maintained with the correct concentration
and type of engine coolant to prevent
freezing and corrosion. Never allow the
concentration of antifreeze to exceed the
60% level or go below the 35% level, or
damage to the cooling system may result.
For proper concentration when adding or
replacing the engine coolant, refer to the
following table.
G050C01NF-GATTo Check the Coolant LevelThe coolant level can be seen on the side
of the plastic coolant reservoir. The level of
the coolant should be between the "L" and
"F" lines on the reservoir when the engine
is warm with it at idle . If the level is below
the "L" mark, add engine coolant to bring
it up to "F". If the level is low, inspect for
coolant leaks and recheck the fluid level
frequently. If the level drops again, visit
your Hyundai dealer for an inspection and
diagnosis of the reason.
G050C01NFG050D01NF-GAT
To Change the Engine CoolantThe engine coolant should be changed at
those intervals specified in the vehicle
maintenance schedule in Section 5.
CAUTION:
o Engine coolant can damage the finish
of your car. If you spill engine coolant
on the car, wash it off thoroughly with
clean water.
o The engine in your vehicle has alumi-
num engine parts and must be
protected by an ethylene-glycol base
coolant to prevent corrosion and freez-
ing.
Do not use hard water. Hard water can
cause engine damage from corro-
sion, overheating or freezing.
!
1. Park the car on level ground, set the
parking brake and remove the radiator
cap when cool. Ambient
temperature
°F (°C)
5 (-15)
-13 (-25)
-31 (-35)
-49 (-45)
65%
60%
50%
40% 35%
40%
50%
60%Water Antifreeze
solution Engine Coolant concentration

6
DO-IT-YOURSELF MAINTENANCE
10
3. Be sure your drain receptacle is in place.
Open the drain cock on the radiator.
Allow all the engine coolant to drain
from the cooling system, and then
securely close the drain cock.
4. Check Section 9 for the capacity of the
cooling system in your car. Then,
following the manufacturer's directions
on the engine coolant container, add
the appropriate quantity of coolant to
the radiator.
5. Slowly fill the radiator with the proper
coolant mixture (see the "Recom-
mended Engine Coolant in previous
page) until the fluid level stays up in the
radiator neck. And pump the radiator
hose in order to bleed the air.
HNF5008
2. Wrap a thick cloth around the radiator
cap and slowly turn the radiator cap
counterclockwise without pressing
down on it, until it stops. This relieves
any pressure remaining in the cooling
system. When you are sure that all the
pressure has been released, remove
the radiator cap by pushing down and
turning counterclockwise.
G050D02NF-A
G050D01NF
6. Run the engine at idle until the coolant
circulates. If the cooling fan operates
and the coolant starts to circulate, add
the coolant to the reservoir.
7. To bleed the air in the cooling system,
repeat procedure 6 until the cooling fan
operates 3~5 times.
8. Replace the radiator cap and turn it until
tightly installed. And then, add coolant
to the reservoir until the level is between
"L" and "F".
9. Stop the engine and check the coolant
level when the engine is cool. The level
of the coolant should be the "L" and "F"
lines on the reservoir. If the level is
below the "L" line, repeat the procedure
4~8 until the level between "L" and "F".

6
DO-IT-YOURSELF MAINTENANCE
11
!!
10. Replace the reservoir cap and check to
be sure the drain cock and the radiator
cap are fully closed and not leaking.
CAUTION:
Recheck after a few days and add the
coolant if the level is below the "L" level.
WARNING:
The cooling fan is controlled by engine
coolant temperature and may
sometimes operate even when the
engine is not running. Use extreme
caution when working near the blades of
the coolant fan so that you are not injured
by a rotating fan blade. As the engine
coolant temperature decreases, the fan
will automatically shut off. This is a
normal condition.
CAUTION:
o Operating your vehicle without using
a proper air cleaner filter in place can
result in excessive engine wear.
o When removing the air cleaner filter,
be careful that dust or dirt does not
enter the air intake. These may result
in damage to the air cleaner filter.
!
CHANGING THE AIR
CLEANER FILTERG070A03Y-AATThe replacement of the air cleaner filter is
performed in the following manner.
1. Unsnap the clips around the cover.
2. When this is done, the cover can be
lifted off, the old filter removed and the
new filter put in its place.
Genuine Hyundai replacement parts are
recommended.
ONF078011

6
DO-IT-YOURSELF MAINTENANCE
14
CAUTION:
o Radiator antifreeze (engine coolant)
should not be used in the washer
system because it will damage the
car's finish.
o The washer lever should not be pulled
and the washer should not be operated
if the washer reservoir is empty. This
can damage the washer fluid pump.
!
A good quality washer fluid should be
used to fill the washer reservoir. The fluid
level should be checked more frequently
during bad weather or whenever the
washer system is in more frequent use.
The capacity of the washer reservoir is 3.2
U.S. quarts (4.0 liters).
!
WARNING:
It is always better to check the transaxle
oil level when the engine is cool or cold.
If the engine is hot, you should exercise
great caution to avoid burning yourself
on hot engine or exhaust parts.
CHECKING THE TRANSAXLE
OIL (MANUAL)G100A02NF-AAT
HNF5010
Filler plug
Drain plug
Transaxle lubricant in the manual transaxle
should be checked at those intervals
specified in the vehicle maintenance
schedule in Section 5.Recommended OilUse only HYUNDAI GENUINE PARTS MTF
75W/85 (API GL-4) in the manual transaxle.Manual Transaxle Oil CapacityThe oil capacity of the manual transaxle is
1.8 U.S. quarts (1.75 liters).
!
WARNING:
o Windshield washer fluid agents con-
tain some amounts of alcohol and can
be flammable under certain circum-
stances. Do not allow sparks or flame
to contact the washer fluid or the
washer fluid reservoir. Damage to
the vehicle or its occupants could
occur.
o Windshield washer fluid is poisonous
to humans and animals. Do not drink
windshield washer fluid. Serious injury
or death could occur.
NOTE:It is recommended that the manual
transaxle fluid should be checked by an
authorized Hyundai Dealer.