2023 HYUNDAI TUCSON HYBRID Owners Manual

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3. Exhaust Emission Control System
The Exhaust Emission Control System is
a highly effective system which controls
exhaust emissions while maintaining
good vehicle performance.
When the engine starts or fails to start,
excessive attempts to restart the engine
may cause damage to the emission
system.
Engine exhaust (carbon monoxide)
precautions
• Carbon monoxide can be present
with other exhaust fumes. If you smell
exhaust fumes of any kind in your
vehicle, drive with all the windows
fully open. Have your vehicle checked
and repaired immediately.
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 poisoning.
WARNING
CALIFORNIA PROPOSITION 65
WARNING
Engine exhaust and a wide variety of
automobile components and parts,
including components found in the
interior furnishings in a vehicle, contain
or emit chemicals known to the State
of California to cause cancer and birth
defects and reproductive harm.
In addition, certain fluids contained
in vehicles and certain products of
component wear contain or emit
chemicals known to the State of
California to cause cancer and birth
defects or other reproductive harm.
• Do not operate the engine in confined or closed areas (such as garages) any
more than what is necessary to move
the vehicle in or out of the area.
• 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.

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Operating precautions for catalytic
converters (if equipped)
WARNING
The exhaust system and catalytic
system are very hot while the engine is
running or immediately after the engine
is turned off. To avoid SERIOUSINJURY
or DEATH:
• Do not park, idle, or drive the vehicle
over or near flammable 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 converter or you may
get burned.
Also, Do not remove the heat sink
around the exhaust system, do not
seal the bottom of the vehicle, and
do not coat the vehicle for corrosion
control. It may present a fire risk
under certain conditions. Your vehicle is equipped with a catalytic
converter emission control device.
To prevent damage to the catalytic
converter and to your vehicle, take the
following precautions:
• Use only UNLEADED FUEL for
gasoline engines.
• Do not operate the vehicle when there are signs of engine malfunction,
such as misfire or a noticeable loss of
performance.
• Do not misuse or abuse the engine. Examples of misuse are coasting with
the hybrid system off and descending
steep grades in gear with the hybrid
system off.
• Do not operate the engine at high idle speed for extended periods (5
minutes or more).
• Do not modify or tamper with any part of the engine or emission control
system. Have all inspections and
adjustments made by an authorized
HYUNDAI dealer.
• Avoid driving with an extremely low fuel level.
Running out of fuel could cause the
engine to misfire, damaging the
catalytic converter.

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CALIFORNIA PERCHLORATE NOTICE
Perchlorate Material-special handling may apply, See: https://dtsc.ca.gov/perchlorate
Notice to California Vehicle Dismantlers: Perchlorate containing materials, such as
air bag inflators, seatbelt pretensioners and keyless remote entry batteries, must be
disposed of according to Title 22 California Code of Regulations Section 67384.10 (a).