Volvo S60 Twin Engine 2020, Owner'S Manual

Page: 451 / 687

STARTING AND DRIVING
449
WARNING
Never carry a cell phone that is switched
on while refueling your vehicle. If the
phone rings, this may cause a spark that
could ignite gasoline fumes, resulting in fire
and injury.
WARNING
Carbon monoxide is a poisonous, colorless,
and odorless gas. It is present in all exhaust
gases. If you ever smell exhaust fumes
inside the vehicle, make sure the passenger
compartment is ventilated, and immedi-
ately return the vehicle to a trained and
qualified Volvo service technician for cor-
rection.
Demanding driving
In demanding driving conditions, such as
when towing a trailer or driving in hot weather
or for prolonged periods at high altitudes, it
may be a good idea to switch to a higher-
octane fuel (AKI
14 91 or higher) or to switch to
another brand of gasoline in order to fully uti-
lize the vehicle's engine capacity and optimize
traction.
Related information
•
Fuel (p. 446)
•
Emission controls (p. 449)
Emission controls
Three-way catalytic converter
•
Keep your engine properly tuned. Certain
engine malfunctions, particularly involving
the electrical, fuel or distributor ignition
systems, may cause unusually high three-
way catalytic converter temperatures. Do
not continue to operate your vehicle if you
detect engine misfire, noticeable loss of
power or other unusual operating condi-
tions, such as engine overheating or back-
firing. A properly tuned engine will help
avoid malfunctions that could damage the
three-way catalytic converter.
•
Do not park your vehicle over combustible
materials, such as grass or leaves, which
can come into contact with the hot
exhaust system and cause such materials
to ignite under certain wind and weather
conditions.
•
Excessive starter cranking (in excess of
one minute), or an intermittently firing or
flooded engine can cause three-way cata-
lytic converter or exhaust system over-
heating.
•
Remember that tampering or unauthor-
ized modifications to the engine, the
Engine Control Module, or the vehicle may
be illegal and can cause three-way cata-
lytic converter or exhaust system over-
heating. This includes: altering fuel injec-
tion settings or components, altering
emission system components or location
or removing components, and/or repeated
use of leaded fuel.
NOTE
Unleaded fuel is required for vehicles with
three-way catalytic converters.
Heated oxygen sensors
The heated oxygen sensors monitor the oxy-
gen content of the exhaust gases. Readings
are fed into a control module that continuously
monitors engine functions and controls fuel
injection. The ratio of fuel to air into the engine
is continuously adjusted for efficient combus-
tion to help reduce harmful emissions.
Related information
•
Octane rating (p. 447)
•
Fuel (p. 446)
14 AKI (Anti Knock Index) is an average value of RON (Research Octane Number) and MON (Motor Octane Number) - (RON)+(MON)/2