Maintenance -> Emission Control System for Your Hyundai Tucson SUV 2020

EMISSION CONTROL SYSTEM  
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.  
1. Crankcase Emission Control  
System  
NOTICE  
For  
the  
Inspection  
and  
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.  
Maintenance Test (With Electronic  
Stability Control (ESC) system)  
• To prevent the vehicle from mis-  
firing during dynamometer test-  
ing, turn the Electronic Stability  
Control (ESC) system off by  
pressing the ESC switch (ESC  
OFF light illuminated).  
• After dynamometer testing is  
completed, turn the ESC system  
back on by pressing the ESC  
switch again.  
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  
2. Evaporative Emission Control  
System Including Onboard  
Refueling Vapor Recovery  
(ORVR)  
(3) Exhaust emission control system  
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.  
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.  
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Maintenance  
Canister  
Engine exhaust (carbon monox-  
ide) precautions  
3. Exhaust Emission Control  
System  
The Exhaust Emission Control  
System is a highly effective system  
which controls exhaust emissions  
while maintaining good vehicle per-  
formance.  
When the engine starts or fails to  
start, excessive attempts to restart  
the engine may cause damage to the  
emission system.  
Fuel 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 sole-  
noid valve.  
• Carbon monoxide can be present  
with other exhaust fumes. If you  
smell exhaust fumes of any kind in  
your vehicle, drive with all the win-  
dows fully open. Have your vehicle  
checked and repaired immediately.  
Purge Control Solenoid Valve  
(PCSV)  
WARNING  
Engine exhaust gases contain  
carbon monoxide (CO). Though  
colorless and odorless, it is  
dangerous and could be lethal if  
inhaled. Follow the instructions  
on this page to avoid CO poi-  
soning.  
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 evap-  
orated 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.  
Vehicle modifications  
• This vehicle should not be modi-  
fied. Modification of your vehicle  
could affect its performance, safety  
or durability and may even violate  
governmental safety and emis-  
sions regulations.  
In addition, damage or performance  
problems resulting from any modifi-  
cation may not be covered under  
warranty.  
• If you use unauthorized electronic  
devices, it may cause the vehicle to  
operate abnormally, wire damage,  
battery discharge and fire. For your  
safety, do not use unauthorized  
electronic devices.  
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• Do not operate the engine in con-  
fined or closed areas (such as  
garages) any more than what is  
necessary to move the vehicle in or  
out of the area.  
Operating precautions for cat-  
alytic converters (if equipped)  
WARNING  
CALIFORNIA PROPOSITION 65  
WARNING  
WARNING  
Engine exhaust and a wide vari-  
ety of automobile components  
and parts, including compo-  
nents found in the interior fur-  
nishings in a vehicle, contain or  
emit chemicals known to the  
State of California to cause can-  
cer and birth defects and repro-  
ductive harm. In addition, cer-  
tain fluids contained in vehicles  
and certain products of compo-  
nent wear contain or emit chem-  
icals known to the State of  
California to cause cancer and  
birth defects or other reproduc-  
tive harm.  
• When the vehicle is stopped in an  
open area for more than a short  
time with the engine running,  
adjust the ventilation system (as  
needed) to draw outside air into the  
vehicle.  
• Never sit in a parked or stopped  
vehicle for any extended time with  
the engine running.  
• When the engine stalls or fails to  
start, excessive attempts to restart  
the engine may cause damage to  
the emission control system.  
The exhaust system and cat-  
alytic converter are very hot  
during and immediately after  
the engine has been running.To  
avoid SERIOUS INJURY or  
DEATH:  
Do not park, idle, or drive the  
vehicle over or near flamma-  
ble objects, such as grass,  
vegetation, paper, leaves, etc.  
A hot exhaust system can  
ignite flammable items under  
your vehicle.  
Keep away from the exhaust  
system and catalytic convert-  
er or you may get burned.  
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Also, Do not remove the heat  
sink around the exhaust sys-  
tem, do not seal the bottom of  
the vehicle, and do not coat  
the vehicle for corrosion con-  
trol. It may present a fire risk  
under certain conditions.  
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Maintenance  
Your vehicle is equipped with a cat- • Do not modify or tamper with any  
alytic converter emission control  
device. To prevent damage to the  
catalytic converter and to your vehi-  
cle, take the following precautions:  
part of the engine or emission con-  
trol system. All inspections and  
adjustments must be made by an  
authorized HYUNDAI dealer.  
• Use only UNLEADED FUEL for • Avoid driving with extremely low  
gasoline engines.  
fuel level. If you run out of gasoline,  
it could cause the engine to misfire  
and result in excessive loading of  
the catalytic converter.  
• Do not operate the vehicle when  
there are signs of engine malfunc-  
tion, such as misfire or a noticeable  
loss of performance.  
• Do not misuse or abuse the  
engine. Examples of misuse are  
coasting with the engine off and  
descending steep grades in gear  
with the engine off.  
• Do not operate the engine at high  
idle speed for extended periods (5  
minutes or more).  
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