2018 Hyundai Sonata air filter

7-85
7
Maintenance
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The emission control system of your
vehicle is covered by a written limited
warranty. Please see the warranty
information contained in the Owner’s
Handbook & Warranty Information
booklet in your vehicle.
Your vehicle is equipped with an
emission control system to meet all
applicable emission regulations.
There are three emission control
systems, as follows.
(1) Crankcase emission control sys-
tem
(2) Evaporative emission control sys- tem
(3) Exhaust emission control system
In order to assure the proper function
of the emission control systems, it is
recommended that you have your
vehicle inspected and maintained by
an authorized HYUNDAI dealer in
accordance with the maintenance
schedule in this manual.1. Crankcase Emission Control System
The positive crankcase ventilation
system is employed to prevent air
pollution caused by blow-by gases
being emitted from the crankcase.
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.
2. Evaporative Emission ControlSystem Including Onboard
Refueling Vapor Recovery
(ORVR)
The Evaporative Emission Control
System is designed to prevent fuel
vapors from escaping into the atmos-
phere. The ORVR system is
designed to allow the vapors from
the fuel tank to be loaded into a can-
ister while refueling at the gas sta-
tion, preventing the escape of fuel
vapors into the atmosphere.
For the Inspection and
Maintenance Test (With Electronic
Stability Control (ESC) system)
To prevent the vehicle from
misfiring during dynamome-
ter testing, turn the Electronic
Stability Control (ESC) sys-
tem off by pressing the ESC
switch (ESC OFF light illumi-
nated).
After dynamometer testing is
completed, turn the ESC sys-
tem back on by pressing the
ESC switch again.
CAUTION

I-2
Accessing your vehicle .....................................................3-4Immobilizer System ...................................................3-12
Remote Key ..................................................................3-4
Smart Key.....................................................................3-8\
Air Bag - Advanced Supplemental Restraint System.....2-45 Additional Safety Precautions ....................................2-67
Air Bag Warning Labels.............................................2-68
How Does the Air Bag System Operate? ...................2-51
Occupant Classification System (OCS) .....................2-56
SRS Care ....................................................................2-66\
What to Expect After an Air Bag Inflates ..................2-55
Where Are the Air Bags? ...........................................2-47
Why Didn't My Air Bag Go Off in a Collision? (Air bags are not designed to inflate in
every collision.).......................................................2-61
Air Cleaner......................................................................7-\
31 Filter Replacement .....................................................7-31
Air Conditioning System ..................................................8-6
Appearance Care .............................................................7-77 Exterior Care ..............................................................7-77
Interior Care ...............................................................7-82
Automatic climate control system ................................3-132 Automatic Heating and Air Conditioning ................3-133
Manual heating and Air Conditioning......................3-134
System Maintenance ................................................3-142
System Operation .....................................................3-140 Automatic emergency braking (AEB) ............................5-97
AEB warning message and system control................5-99
Limitation of the system ..........................................5-105
Sensor to detect the distance from the vehicle in front (front radar) ..............................................5-102
System malfunction ..................................................5-103
System setting and activation .....................................5-97
Battery ........................................................................\
.....7-37 Battery Recharging .....................................................7-38
For Best Battery Service ............................................7-38
Reset features .............................................................7-39
Before Driving ..................................................................5-4 Before Entering the Vehicle .........................................5-4
Before Starting .............................................................5-4
Blind Spot Detection System (BSD) ..............................5-89 BSD (Blind Spot Detection) / LCA (Lane Change Assist) .....................................5-90
RCTA (Rear Cross Traffic Alert) ...............................5-93
Brake Fluid .....................................................................7-2\
9 Checking the Brake Fluid Level ................................7-29
Index
A
B

I-3
Braking System ...............................................................5-28Anti-lock Brake System (ABS)..................................5-40
AUTO HOLD .............................................................5-37
Disc Brakes Wear Indicator........................................5-29
Electronic Parking Brake (EPB) ................................5-31
Electronic Stability Control (ESC).............................5-43
Foot Parking Brake ....................................................5-29
Good Braking Practices..............................................5-47
Hill-Start Assist Control (HAC)................................5-46
Power Brakes..............................................................5-28
Bulb Wattage .....................................................................8-3\
California Perchlorate Notice .........................................7-89
Child Restraint System (CRS) ........................................2-34 Children Always in the Rear ......................................2-34
Installing a Child Restraint System (CRS) ................2-37
Selecting a Child Restraint System (CRS).................2-35
Climate control additional features...............................3-147 Automatic Ventilation...............................................3-147
Sunroof Inside Air Recirculation .............................3-147
Climate Control Air Filter...............................................7-33 Filter Inspection..........................................................7-33
Consumer Information ....................................................8-12
Cruise Control .................................................................5-54 Cruise Control Operation ...........................................5-54 Defroster .......................................................................3\
-121
Rear Window Defroster............................................3-121
Dimensions .......................................................................8\
-2
Door locks .......................................................................3\
-14 Auto Door Lock/Unlock Features ..............................3-17
Child-Protector Rear Door locks................................3-18
Inside the Vehicle .......................................................3-15
Outside the Vehicle.....................................................3-14
Drive Mode Integrated Control System .........................5-48 ECO mode ..................................................................5-49
SMART mode.............................................................5-50
SPORT mode ..............................................................5-50
Driver assist system ......................................................3-117 Rear Parking Assist System......................................3-118
Rear View Camera....................................................3-117
Driver attention alert system (DAA) ..............................5-84 Resetting the system ...................................................5-86
System malfunction ....................................................5-86
System setting and activation .....................................5-84
System standby...........................................................5-86
Driver position memory system .....................................3-20 Easy Access Function .................................................3-21
Storing Positions into Memory ..................................3-20
I
Index
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D

I-4
Emission Control System ...............................................7-85Crankcase Emission Control System .........................7-85
\Evaporative Emission Control System Including
Onboard Refueling Vapor Recovery (ORVR) .............7-85
Exhaust Emission Control System .............................7-86
Engine ........................................................................\
.......8-2
Engine compartment..................................................1-6, 7-3
Engine Coolant ...............................................................7-26 Changing Engine Coolant ..........................................7-28
Checking the Engine Coolant Level ..........................7-26
Engine Number ...............................................................8-11
Engine Oil .......................................................................7\
-23 Checking the Engine Oil and Filter ...........................7-25
Checking the Engine Oil Level ..................................7-23
Explanation of Scheduled Maintenance Items ...............7-20 Air Cleaner Filter .......................................................7-20
Air Conditioning Refrigerant .....................................7-22
Automatic Transmission Fluid ...................................7-21
Brake Discs, Pads, Calipers and Rotors .....................7-22
Brake Fluid .................................................................7-22
Brake hoses and Lines................................................7-22
Cooling System ..........................................................7-21
Drive Belts..................................................................7-20
Drive Shafts and Boots ..............................................7-22
Ecoshift Dual Clutch Transmission Fluid ..................7-21 Engine Coolant ...........................................................7-21
Engine Oil and Filter ..................................................7-20
Exhaust Pipe and Muffler...........................................7-22
Fuel Filter ...................................................................7-20
Fuel Lines, Fuel Hoses and Connections ...................7-20
Parking Brake .............................................................7-22
Spark Plugs.................................................................7-20
Steering Gear Box, Linkage & Boots/ Lower Arm Ball Joint .............................................7-22
Suspension Mounting Bolts .......................................7-22
Valve Clearance ..........................................................7-21
Vapor Hose and Fuel Filler Cap .................................7-20
Exterior features..............................................................3-52 Fuel Filler Door ..........................................................3-59
Hood ........................................................................\
...3-52
Smart Trunk ................................................................3-56
Trunk ........................................................................\
..3-53
Exterior overview (I) ........................................................1-2
Exterior overview (II) .......................................................1-3
Fuses ........................................................................\
.......7-56 Engine Compartment Panel Fuse Replacement .........7-58
Fuse/Relay Panel Description ....................................7-60
Instrument Panel Fuse Replacement ..........................7-57
Index
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