2005 Hyundai Sonata fuel cap

1FEATURES OF YOUR HYUNDAI2
B010A01NF-A
FUEL RECOMMENDATIONS
CAUTION:
Your Hyundai's New Vehicle Limited War-
ranty may not cover damage to the fuel
system and any performance problems that
are caused by the use of fuels containing
methanol or fuels containing MTBE (Methyl
Tertiary Butyl Ether) over 15.0% vol. (Oxy-
gen Content 2.7% weight.)
B010B01A-AATWhat About Gasohol?Gasohol (a mixture of 90% unleaded gasoline
and 10% ethanol or grain alcohol) may be used
in your Hyundai. However, if your engine devel-
ops driveability problems, the use of 100%
unleaded gasoline is recommended. Fuels with
unspecified quantities of alcohol, or alcohols
other than ethanol, should not be used.
B010A01NF-AATUse Unleaded GasolineUnleaded gasoline with a Pump Octane
Rating of 87 (Research Octane Number 91)
or higher must be used in your Hyundai.
B010C01A-AATUse of MTBEHyundai recommends that fuels containing
MTBE (Methyl Tertiary Butyl Ether) over 15.0%
vol. (Oxygen Content 2.7% weight) should not
be used in your Hyundai.
Fuel containing MTBE over 15.0% vol. (Oxygen
Content 2.7% weight) may reduce vehicle per-
formance and produce vapor lock or hard
starting.
B010D01A-AATDo Not Use MethanolFuels containing methanol (wood alcohol) should
not be used in your Hyundai. This type of fuel
can reduce vehicle performance and damage
components of the fuel system.
!
!
UNLEADED
FUEL ONLY
CAUTION:
o Do not "TOP-OFF" after the first nozzle
shut off when refueling.
o The fuel cap must be tightened until cap
clicks, otherwise " " light will
illuminate.

1
FEATURES OF YOUR HYUNDAI
55
B270A01O-AATBRAKE PAD WEAR WARNING SOUNDThe front and rear disc brake pads have wear
indicators that should make a high-pitched
squealing or scraping noise when new pads are
needed. The sound may come and go or be
heard all the time when the vehicle is moving. It
may also be heard when the brake pedal is
pushed down firmly. Excessive rotor damage
will result if the worn pads are not replaced. See
your Hyundai dealer immediately.
B260Q01NF-GAT
CRUISE Indicator Light
The cruise indicator light in the instrument clus-
ter is illuminated when the cruise control ON/
OFF button on the steering wheel is pushed.
The indicator light turns off when the cruise
control ON/OFF button is pushed again. Infor-
mation about the use of cruise control begins on
page 1-93.B260R01NF-GAT
Cruise SET Indicator Light
The Cruise SET indicator light in the instrument
cluster is illuminated when the cruise control
"COAST/SET" or "RES/ACCEL" switch is
pushed. The Cruise SET indicator light does not
illuminate when the cruise control "CANCEL"
switch is pushed or the system is disengaged.
To disengage the cruise control system, refer
to "To cancel the cruise speed" on page 1-94.
B260S01NF-GAT
Low Windshield Washer Fluid
Level Warning Light
The low windshield washer fluid warning light
comes on when the washer fluid reservoir is
approaching empty. When it comes on, add
washer fluid at your earliest opportunity.
INSTRUMENT CLUSTERB280A01NF-AATFUEL GAUGEThe needle on the gauge indicates the approxi-
mate fuel level in the fuel tank. The fuel capacity
is given in section 9.NOTE:The " " symbol means, the fuel filler
lid is located on the left side of the vehicle.
B280A01NF

1FEATURES OF YOUR HYUNDAI88
WARNING:
o If you open the fuel filler cap during high
ambient temperatures, a slight "pres-
sure sound" may be heard. This is nor-
mal and not a cause for concern.
Whenever you open the fuel filler cap,
turn it slowly.
o Make sure the fuel filler cap is replaced
and securely seated after fueling. Failure
to replace or fully seat the fuel filler cap
will result in fuel vapors escaping into
the atmosphere and the check engine
" " indicator illuminating.
o Do not "TOP-OFF" after the first nozzle
shut off when refueling.
o Automotive fuels are flammable/explo-
sive materials. When refueling, please
note the following guidelines carefully.
- Before touching the fuel nozzle or fuel
filler cap, have one's hands in contact
with metal parts away from the filler
neck to discharge static electricity.
!
!
WARNING:
o The fuel cap must be tightened until the
cap clicks, otherwise " " light will
illuminate.
o Gasoline vapors are dangerous. Before
refueling, always stop the engine and
never allow sparks or open flames near
the filler area. If you need to replace the
filler cap, use a genuine Hyundai re-
placement part.
HNF2021
!
WARNING:
- Do not get back in the vehicle while
refueling. Do not operate anything that
can produce static electricity. Static
electricity discharge can ignite fuel
vapors resulting in an explosion.
- When using a portable fuel container,
be sure to place the container on the
ground while refueling. Static electric-
ity discharge from the container can
ignite fuel vapors causing a fire. While
starting refueling, contact should be
maintained until the filling is complete.
- Do not use cellular phones around a
gas station. The electric current or elec-
tronic interference from cellular phones
can ignite fuel vapors causing a fire.
- When refueling, always turn the engine
off. Sparks by engine compartment
electrical equipment can ignite fuel
vapors causing a fire. After refueling,
check to make sure the fuel filler cap is
securely closed, and then start the
engine.
- Do not smoke or try to light cigarettes
around a gas station. Automotive fuels
are flammable.

2
DRIVING YOUR HYUNDAI
25
!
WARNING:
o Overloading your vehicle can
cause heat buildup in your
vehicle's tires and possible tire
failure that could lead to a crash.
o Overloading your vehicle can
cause increased stopping dis-
tances that could lead to a crash.
o A crash resulting from poor han-
dling vehicle damage, tire failure,
or increased stopping distances
could result in serious injury or
death.
!
This label also tells you the maximum
weights that can be supported by the
front and rear axles, called Gross Axle
Weight Rating (GAWR). To find out the
actual loads on your front and rear
axles, you need to go to a weigh station
and weigh your vehicle. Your dealer can
help you with this. Be sure to spread out
your load equally on the left and right
sides of the centerline.
WARNING:
o Never exceed the GVWR for your
vehicle or the GAWR for either the
front or rear axle.
o Do not load your vehicle any
heavier than the GVWR or either
the maximum front or rear GAWR.
If you do, parts on your vehicle
can break, and it can change the
way your vehicle handles. This
could cause you to lose control
and crash. Also, overloading can
shorten the life of your vehicle.
C190G02JM-AATCompliance LabelThe compliance label is located on the
driver's side of the center pillar outer
panel.
The label shows the size of your original
tires and the inflation pressures needed
to obtain the gross weight capacity of
your vehicle. This is called the GVWR
(Gross Vehicle Weight Rating). The
GVWR includes the weight of the ve-
hicle, all occupants, fuel and cargo.
C190G01JM

5
VEHICLE MAINTENANCE REQUIREMENTS4
SCHEDULED MAINTENANCEF030B03NF-AATR :Replace I : Inspect and, after Inspection, clean, adjust, repair or replace if necessary.F030A01NF-AATThe 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.
DESCRIPTION
EMISSION CONTROL ITEMS
ENGINE OIL AND FILTER
FUEL FILTER
FUEL LINES, FUEL HOSES AND CONNECTIONS
VACUUM AND CRANKCASE VENTILATION HOSES
VAPOR HOSE AND FUEL FILLER CAP
AIR CLEANER FILTER
VALVE CLEARANCE
SPARK PLUGS (IRIDIUM COATED)
FUEL TANK AIR FILTER
ELECTRONIC THROTTLE CONTROL No.
1
2
3
4
5
6
7
8
9
10MILES X 1000
KILOMETERS X 1000
MONTHS7.5
12
6
R
I
I15
24
12
R
I
I
I
I22.5
36
18
R
I
I30
48
24
R
I
I
I
R
R37.5
60
30
R
R
I
I45
72
36
R
I
I
I
I52.5
84
42
R
I
I
I60
96
48
R
I
I
I
R
I
R67.5
108
54
R
I
I75
120
60
R
R
I
I
I
I82.5
132
66
R
I
I90
144
72
R
I
I
I
R
R97.5
156
78
R
I
I
R105
168
84
R
I
I
I
I
I112.5
180
90
R
R
I
I120
192
96
R
I
I
I
R
I
R127.5
204
102
R
I
I135
216
108
R
I
I
I
I142.5
228
114
R
I
I150
240
120
R
R
I
I
I
R
R

5
VEHICLE MAINTENANCE REQUIREMENTS8
F070G02A-AATo Brake FluidCheck brake fluid level in the brake fluid reser-
voir. The level should be between "MIN" and
"MAX" marks on the side of the reservoir. Use
only hydraulic brake fluid conforming to DOT 3
or DOT 4.F070F01A-AATo Brake Hoses and LinesVisually check for proper installation, chafing,
cracks, deterioration and any leakage. Replace
any deteriorated or damaged parts immedi-
ately.
F070E06A-AATo Automatic Transaxle FluidThe fluid level should be in the “HOT” range of
the dipstick, after the engine and transaxle are
at normal operating temperature. Check the
automatic transaxle fluid level with the engine
running and the transaxle in neutral, with the
parking brake properly applied. Use HYUNDAI
GENUINE ATF SP III, DIAMOND ATF SP III, SK
ATF SP III or other brands meeting the SP III
specification approved by Hyundai Motor Co.
when adding or changing fluid. Using the wrong
ATF may result in damage to the ATM.
F070H01A-AATo Rear Brake Drums and Linings/
Parking BrakeCheck the rear brake drums and linings for
scoring, burning, leaking fluid, broken parts,
and excessive wear. Inspect the parking brake
system including the parking brake lever and
cables. For detailed service procedures, refer
to the Shop Manual.
F070C01A-AATo CoolantThe coolant should be changed at the intervals
specified in the maintenance schedule.
F060J01A-AATo Spark PlugsMake sure to install new spark plugs of the
correct heat range.F060H01A-AATo Air Cleaner FilterA Genuine Hyundai air cleaner filter is recom-
mended when the filter is replaced.F060G01A-AATo Vapor Hose and Fuel Filler CapThe vapor hose and fuel filler cap should be
inspected at those intervals specified in the
maintenance schedule. Make sure that a new
vapor hose or fuel filler cap is correctly re-
placed.
F070D01A-AATo Manual Transaxle OilInspect the manual transaxle oil according to
the maintenance schedule.NOTE:If the oil level is low, check for possible leaks
before adding oil. Do not overfill.
F060N02E-AATo Valve ClearanceInspect excessive valve noise and/or engine
vibration and adjust if necessary. A qualified
technician should perform the operation.

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 cool-
ant 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 run-
ning. 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 de-
creases, the fan will automatically shut off.
This is a normal condition.
Type
SK16PR-A11
IFR5G-11
SPARK PLUGSG060A01NF-AAT
G060A01LYour engine was originally equipped with Iri-
dium-tipped spark plugs.
Iridium-tipped spark plugs will last longer than
conventional type spark plugs and can be
identified by blue lines on the ceramic shell.NOTE:Do not clean or regap Iridium-tipped spark
plugs.
G060B01NF-AATReplacing the Spark PlugsThe spark plugs should be changed at the
intervals specified in the vehicle maintenance
schedule in Section 5 or whenever engine
performance indicates they should be changed.
Symptoms that suggest poor spark plug perfor-
mance include engine misfiring under load, loss
of fuel economy, poor acceleration, etc. When
spark plugs are replaced, always use spark
plugs recommended by Hyundai. The use of
other spark plugs can result in loss of perfor-
mance, radio interference or engine damage.NOTE:When replacing the spark plugs, always use
the genuine parts recommended.Recommended Spark Plugs:
0.039 ~ 0.043 in.
(1.0~1.1 mm)
Remark
2.4L
3.3L

7
EMISSION CONTROL SYSTEMS2
EMISSION CONTROL
SYSTEMS
H010B01A-AAT1. Crankcase Emission Control SystemThe positive crankcase ventilation system is
employed to prevent air pollution caused by
blow-by gases being emitted from the crank-
case. This system supplies fresh filtered air to
the crankcase through the air intake hose.
Inside the crankcase, the fresh air mixes with
blow-by gases, which then pass through the
PCV valve into the induction system.
CanisterFuel vapors generated inside the fuel tank are
absorbed and stored in the onboard canister.
When the engine is running, the fuel vapors
absorbed in the canister are drawn into the
surge tank through the purge control solenoid
valve.Purge Control Solenoid Valve (PCSV)The purge control solenoid valve is controlled
by the Engine Control Module (ECM); when the
engine coolant temperature is low during idling,
the PCSV closes so that evaporated fuel is not
taken into the engine. After the engine warms-
up during ordinary driving, the PCSV opens to
introduce evaporated fuel to the engine.H010D01A-AAT3. Exhaust Emission Control
SystemThe Exhaust Emission Control System is a
highly effective system which controls exhaust
emissions while maintaining good vehicle per-
formance.
H010A01NF-AATYour Hyundai is equipped with an emission
control system to meet all emission regulations.
There are three emission control systems which
are as follows.
(1) Crankcase emission control system
(2) Evaporative emission control system
(3) Exhaust emission control system
In order to assure the proper function of the
emission control systems, it is recommended
that you have your car inspected and main-
tained by an authorized Hyundai dealer in ac-
cordance with the maintenance schedule in this
manual.
Caution for the Inspection and Maintenance
Test (With Electronic Stability Control (ESC)
system)
o To prevent the vehicle from misfiring
during dynamometer testing, turn the
Electronic Stability Control (ESC) sys-
tem off by pressing the ESC switch.
o After dynamometer testing is completed,
turn the ESC system back on by pressing
the ESC switch again.
H010C01S-AAT2. Evaporative Emission Control (Includ-
ing ORVR: Onboard Refueling Vapor
Recovery) SystemThe Evaporative Emission Control System is
designed to prevent fuel vapors from escaping
into the atmosphere.
(The ORVR system is designed to allow the
vapors from the fuel tank to be loaded into a
canister while refueling at the gas station, pre-
venting the escape of fuel vapors into the
atmosphere.)