Three−Way Catalytic Converters - Toyota 2007 Prius Owner's Manual

Three−way catalytic converters
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The three−way catalytic converters are
emission control devices installed in
the exhaust system.
Its purpose is to reduce pollutants in the
exhaust gas.
CAUTION
D
Keep people and combustible mate-
rials away from the exhaust pipe
while the engine is running. The
exhaust gas is very hot.
D
Do not drive, idle or park your ve-
hicle over anything that might burn
easily such as grass, leaves, paper
or rags.
NOTICE
A large amount of unburned gases
flowing into the three−way catalytic
converter may cause it to overheat
and create a fire hazard. To prevent
this and other damage, observe the
following precautions:
z Use only unleaded gasoline.
z Do not drive with an extremely low
fuel level; running out of fuel could
cause the engine to misfire, creat-
ing an excessive load on the three−
way catalytic converter.
z Do not turn off the ignition while
the vehicle is moving.
z Keep your engine in good running
order. Malfunctions in the engine
electrical system, electronic ignition
system/distributor ignition
or fuel system could cause an ex-
tremely high temperature.
z If the engine becomes difficult to
start or stalls frequently, take your
vehicle in for a check−up as soon
as possible. Remember, your Toyota
dealer knows your vehicle and its
three−way catalytic converter sys-
tem best.
z To ensure that the three−way cata-
lytic converter and the entire emis-
sion control system operate proper-
ly, your vehicle must receive the
periodic inspections required by the
Toyota Maintenance Schedule. For
scheduled maintenance information,
refer to the "Scheduled Maintenance
Guide" or "Owner's Manual Supple-
ment".
system
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