2016 Hyundai Sonata Plug-in Hybrid fuel cap

3-64
Convenient features of your vehicle
Fuel Gauge
This gauge indicates the approxi-
mate amount of fuel remaining in the
fuel tank.
Information
• The fuel tank capacity is specified in
chapter 8.
• The fuel gauge is supplemented by a
low fuel warning light, which will
illuminate when the fuel tank is
nearly empty.
• On inclines or curves, the fuel gauge
pointer may fluctuate or the low fuel
warning light may come on earlier
than usual due to the movement of
fuel in the tank.
Avoid driving with an extremely
low fuel level. Running out of fuel
could cause the engine to misfire,
damaging the catalytic converter.
NOTICE
i
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 "E (Empty)"
level.
WARNING
OLFH044207K

5-94
Driving your vehicle
Certification label
The certification label is located on
the driver’s door sill at the center pil-
lar and shows the maximum allow-
able weight of the fully loaded vehi-
cle. This is called the GVWR (Gross
Vehicle Weight Rating). The GVWR
includes the weight of the vehicle, all
occupants, fuel and cargo.
This label also tells you the maxi-
mum weight that can be supported
by the front and rear axles, called
Gross Axle Weight Rating (GAWR).The total weight of the vehicle,
including all occupants, accessories,
cargo, and trailer tongue load must
not exceed the Gross Vehicle Weight
Rating (GVWR) or the 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. Be
sure to spread out your load equally
on both sides of the centerline.
OBH059070
Overloading
Never exceed the GVWR for
your vehicle, the GAWR for
either the front or rear axle
and vehicle capacity weight.
Exceeding these ratings can
affect your vehicle’s handling
and braking ability, and cause
an accident.
Do not overload your vehicle.
Overloading your vehicle can
cause heat buildup in your
vehicle’s tires and possible
tire failure, increased stop-
ping distances and poor vehi-
cle handling-all of which may
result in a crash.
WARNING

7
Maintenance
7-11
Normal maintenance schedule (CONT.)
30,000 miles (48,000 km) or 24 months
❑Inspect vacuum hose
❑ Inspect air conditioning refrigerant
❑ Inspect brake hoses and lines
❑ Inspect drive shafts and boots
❑ Inspect exhaust pipe and muffler
❑ Inspect HSG belt *
2
(30,000 miles (48,000 km) or 48 months)
❑ Inspect front brake disc/pads, calipers
❑ Inspect rear brake disc/pads
❑ Inspect steering gear box, linkage & boots/lower arm ball
joint, upper arm ball joint
❑ Inspect suspension mounting bolts
❑ Inspect brake fluid
❑ Inspect fuel filter *
3
❑Inspect fuel cap, fuel lines, fuel hoses and connections
❑ Inspect fuel tank air filter (if equipped) *3
❑Inspect parking brake
❑ Inspect vapor hose and fuel filler cap
❑ Air intake hose
❑ Replace climate control air filter
(for evaporator and blower unit)
(Continued)
(Continued)
❑Replace air cleaner filter
❑ Replace engine oil and filter
(30,000 miles (48,000 km) or 48 months)
❑ Add fuel additive *
1
(30,000 miles (48,000 km) or 48 months)
*
1: 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.
*
2: Inspect HSG belt for evidence of cuts, crocks, excessive wear or oil saturation and replace if necessary. If drive belt
noise occurred, readjust drive belt tension before replace.
*
3: Fuel filter & Fuel tank air filter are considered to be mainte- nance free but periodic inspection is recommended for this
maintenance schedule depends on fuel quality. If there are
some important safety matters like fuel flow restriction,
surging, loss of power, hard starting problem etc, replace
the fuel filter immediately regardless of maintenance sched-
ule and consult an authorized HYUNDAI dealer for details.
❈ Inspect : Inspect and if necessary, adjust, correct, clean or
replace.

7
Maintenance
7-13
Normal maintenance schedule (CONT.)
52,500 miles (84,000 km) or 42 months
❑Inspect air cleaner filter
❑ Inspect HSG belt *2
(52,500 miles (84,000 km) or 84 months)
❑ Inspect vacuum hose
❑ Air intake hose
❑ Replace engine oil and filter
(52,500 miles (84,000 km) or 84 months)
❑ Add fuel additive *
1
(52,500 miles (84,000 km) or 84 months)
60,000 miles (96,000 km) or 48 months
❑ Inspect vacuum hose
❑ Inspect air conditioning refrigerant
❑ Inspect brake hoses and lines
❑ Inspect drive shafts and boots
❑ Inspect exhaust pipe and muffler
❑ Inspect front brake disc/pads, calipers
❑ Inspect rear brake disc/pads
❑ Inspect steering gear box, linkage & boots/lower arm ball
joint, upper arm ball joint
❑ Inspect suspension mounting bolts
❑ Inspect brake fluid
❑ Inspect fuel filter *
3
❑Inspect fuel cap, fuel lines, fuel hoses and connections
❑ Inspect fuel tank air filter (if equipped) *3
❑Inspect parking brake
❑ Inspect vapor hose and fuel filler cap
❑ Replace HSG belt *
2
(60,000 miles (96,000 km) or 48 months)
❑ Air intake hose
❑ Replace climate control air filter
(for evaporator and blower unit)
(Continued)
*1: 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.
*
2: Inspect HSG belt for evidence of cuts, crocks, excessive wear or oil saturation and replace if necessary. If drive belt
noise occurred, readjust drive belt tension before replace.
❈ Inspect : Inspect and if necessary, adjust, correct, clean or
replace.

Maintenance
7-16
Normal maintenance schedule (CONT.)
90,000 miles (144,000 km) or 72 months
❑Inspect vacuum hose
❑ Inspect air conditioning refrigerant
❑ Inspect brake hoses and lines
❑ Inspect drive shafts and boots
❑ Inspect exhaust pipe and muffler
❑ Inspect front brake disc/pads, calipers
❑ Inspect rear brake disc/pads
❑ Inspect steering gear box, linkage & boots/lower arm ball
joint, upper arm ball joint
❑ Inspect suspension mounting bolts
❑ Inspect brake fluid
❑ Inspect fuel filter *
3
❑Inspect fuel cap, fuel lines, fuel hoses and connections
❑ Inspect fuel tank air filter (if equipped) *3
❑Inspect parking brake
❑ Inspect vapor hose and fuel filler cap
❑ Inspect HSG belt *
2
(90,000 miles (144,000 km) or 144 months)
❑ Air intake hose
❑ Replace climate control air filter
(for evaporator and blower unit)
❑ Replace air cleaner filter
(Continued)
(Continued)
❑Replace engine oil and filter
(90,000 miles (144,000 km) or 144 months)
❑ Add fuel additive *
1
(90,000 miles (144,000 km) or 144 months)
*
1: 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.
*
2: Inspect HSG belt for evidence of cuts, crocks, excessive wear or oil saturation and replace if necessary. If drive belt
noise occurred, readjust drive belt tension before replace.
*
3: Fuel filter & Fuel tank air filter are considered to be mainte- nance free but periodic inspection is recommended for this
maintenance schedule depends on fuel quality. If there are
some important safety matters like fuel flow restriction,
surging, loss of power, hard starting problem etc, replace
the fuel filter immediately regardless of maintenance sched-
ule and consult an authorized HYUNDAI dealer for details.
❈ Inspect : Inspect and if necessary, adjust, correct, clean or
replace.

Maintenance
7-18
Normal maintenance schedule (CONT.)
112,500 miles (180,000 km) or 90 months
❑Inspect air cleaner filter
❑ Inspect HSG belt *2
(112,500 miles (180,000 km) or 180 months)
❑ Inspect vacuum hose
❑ Air intake hose
❑ Replace engine oil and filter
(112,500 miles (180,000 km) or 180 months)
❑ Add fuel additive *
1
(112,500 miles (180,000 km) or 180 months
120,000 miles (192,000 km) or 96 months
❑ Inspect vacuum hose
❑ Inspect air conditioning refrigerant
❑ Inspect brake hoses and lines
❑ Inspect drive shafts and boots
❑ Inspect exhaust pipe and muffler
❑ Inspect front brake disc/pads, calipers
❑ Inspect rear brake disc/pads
❑ Inspect steering gear box, linkage & boots/lower arm ball
joint, upper arm ball joint
❑ Inspect suspension mounting bolts
❑ Inspect brake fluid
❑ Inspect fuel filter *
3
❑Inspect fuel cap, fuel lines, fuel hoses and connections
❑ Inspect fuel tank air filter (if equipped) *3
❑Inspect parking brake
❑ Inspect vapor hose and fuel filler cap
❑ Air intake hose
❑ Replace climate control air filter
(for evaporator and blower unit)
❑ Replace air cleaner filter
❑ Replace engine oil and filter
(120,000 miles (192,000 km) or 192 months)
(Continued)
*1: 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.
*
2: Inspect HSG belt for evidence of cuts, crocks, excessive wear or oil saturation and replace if necessary. If drive belt
noise occurred, readjust drive belt tension before replace.
❈ Inspect : Inspect and if necessary, adjust, correct, clean or
replace.

7
Maintenance
7-21
Normal maintenance schedule (CONT.)
No check, No service required
❑Automatic transmission fluid
150,000 miles (240,000 km) or 120 months
❑Inspect vacuum hose
❑ Inspect air conditioning refrigerant
❑ Inspect brake hoses and lines
❑ Inspect drive shafts and boots
❑ Inspect exhaust pipe and muffler
❑ Inspect front brake disc/pads, calipers
❑ Inspect rear brake disc/pads
❑ Inspect steering gear box, linkage & boots/lower arm ball
joint, upper arm ball joint
❑ Inspect suspension mounting bolts
❑ Inspect brake fluid
❑ Inspect fuel filter *
3
❑Inspect fuel lines, fuel hoses and connections
❑ Inspect fuel tank air filter (if equipped) *3
❑Inspect parking brake
❑ Inspect vapor hose and fuel filler cap
❑ Inspect HSG belt *
2
(150,000 miles (240,000 km) or 240 months)
❑ Air intake hose
❑ Replace climate control air filter
(for evaporator and blower unit)
❑ Replace air cleaner filter
❑ Replace engine oil and filter
(150,000 miles (240,000 km) or 240 months)
(Continued)
(Continued)
❑Replace engine coolant
(First, 120,000 miles (192,000 km) or 120 months
after every 30,000 miles (48,000 km) or 24 months)
❑ Replace inverter coolant
(First, 120,000 miles (192,000 km) or 120 months
after every 30,000 miles (48,000 km) or 24 months)
❑ Add fuel additive *
1
(150,000 miles (240,000 km) or 240 months)
*
1: 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.
*
2: Inspect HSG belt for evidence of cuts, crocks, excessive wear or oil saturation and replace if necessary. If drive belt
noise occurred, readjust drive belt tension before replace.
*
3: Fuel filter & Fuel tank air filter are considered to be mainte- nance free but periodic inspection is recommended for this
maintenance schedule depends on fuel quality. If there are
some important safety matters like fuel flow restriction,
surging, loss of power, hard starting problem etc, replace
the fuel filter immediately regardless of maintenance sched-
ule and consult an authorized HYUNDAI dealer for details.
❈ Inspect : Inspect and if necessary, adjust, correct, clean or
replace.

7-24
Maintenance
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Engine oil and filter
The engine oil and filter should be
changed at the intervals specified in
the maintenance schedule. If the car
is being driven in severe conditions,
more frequent oil and filter changes
are required.
HSG (Hybrid starter & genera-
tor) belt
The HSG belt should be changed at
the intervals specified in the mainte-
nance schedule.
Fuel filter
A clogged filter can limit the speed at
which the vehicle may be driven,
damage the emission system and
cause multiple issues such as hard
starting. If an excessive amount of
foreign matter accumulates in the
fuel tank, the filter may require
replacement more frequently. After
installing a new filter, run the engine
for several minutes, and check for
leaks at the connections. Fuel filters
should be installed by an authorized
HYUNDAI dealer.
Fuel lines, fuel hoses and con-
nections
Check the fuel lines, fuel hoses and
connections for leakage and dam-
age. Have an authorized HYUNDAI
dealer replace any damaged or leak-
ing parts immediately.
Vapor hose and fuel filler cap
The vapor hose and fuel filler cap
should be inspected at those inter-
vals specified in the maintenance
schedule. Make sure a new vapor
hose or fuel filler cap is correctly
replaced.
Air cleaner filter
A genuine HYUNDAI air cleaner filter
is recommended when the filter is
replaced.
Spark plugs
Make sure to install new spark plugs
of the correct heat range.