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Pontiac 1997 Sunfire Owner's Manual page 132

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If the Light Is On Steady
You may be able to correct the emission system
malfunction by considering the following:
Did you recently put fuel into your vehicle?
If so, reinstall the fuel cap, making sure to fully install
the cap. The diagnostic system can determine if the fuel
cap
has been left
off or
improperly installed. A loose
or
missing fuel cap will allow fuel to evaporate into the
atmosphere.
A
few driving trips with the
cap
properly
installed should turn the light off.
Did you just drive through a d'eep puddle of water?
If so, your electrical system may be wet. The condition
will usually be corrected when the electrical system
dries aut. A few driving trips should turn the light off.
Have you recently changed brands of fuel?
If so, be sure to fuel your vehicle with quality fuel (see
"Fuel" in the Index). Poor fuel quality will cause
YOUT
engine not to run as efficiently as designed. You may
notice this as stalling after start-up, stalling when you
put the vehicle into gear, misfiring, hesitation on
acceleration or stumbling on acceleration. (These
conditions may
go
away
once
the engine is warmed up.)
This will be detected by the system and cause the light
to turn on.
If you experience one or more of these conditions,
change the fuel brand you
use. It
will require at least
one full tank of the proper fuel to turn the light off.
If none of the above steps have made the light turn off,
have your dealer or qualified service center check the
vehicle. Your dealer has the proper
test
equipment and
diagnostic tools to fix any mechanical or electrical
problems that may have developed.
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