Pontiac 2003 Bonneville Owner's Manual page 162

comes on to indicate that there is a problem and service
is required. Malfunctions often will be indicated by the
system before any problem is apparent. This may
prevent more serious damage to your vehicle. This
system is also designed to assist your service technician
in correctly diagnosing any malfunction.
Notice: If you keep driving your vehicle with this
light on, after a while, your emission controls
may not work as well, your fuel economy may not
be as good and your engine may not run as
smoothly. This could lead to costly repairs that may
not be covered by your warranty.
N ~ t i c e : Msdifications made to the engine,
transaxle, exhaust, intake or fuel system of your
vehicle or the replacement of the original tires with
other than those of the same Tire Performance
Criteria (TPC) can affect your vehicle's emission
controls and may cause this light to come on.
Modifications to these systems could lead to costly
repairs mi
covered
by
your
warraiiiy.
This z z y
also result in a failure to pass a required Emission
lnspection/Maintenance test.
This light should come on, as a check to show you it is
working, when the ignition is on and the engine is
not running. if the iight cioesn'i corns on, LA.
,_
: I
I I c l V G I1
repaired. This light will also come on during a
malfunction in one of two ways:
0
Light Flashing
-
A misfire condition has been
detected. A misfire increases vehicle emissions
and may damage the emission control system on
your vehicle. Dealer or qualified service center
diagnosis and service may be required.
Light On Steady
-
An emission control system
malfunction has been detected on your vehicle.
Dealer or qualified service center diagnosis
and service may be required.
If the Light Is Flashing
The following may prevent more serious damage to
your vehicle:
Reducing vehicle speed.
Avoiding hard accelerations.
Avoiding steep uphill grades.
0
If you are towing a trailer, reduce the amount of
cargo being irauied
as
s u w h
as
it
is p ~ ~ s i b k .
If the light stops flashing and remains on steady, see "If
the Light Is On Steady" following.
If the light continues to flash, when
it
is safe to do so,
stop the
vehicle.
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