2003 PONTIAC GRAND PRIX check engine light

Changes or modifications to this system by other than
an authorized service facility could void authorization to
use this equipment.
PASS-Key@
Ill uses a radio frequency transponder in
the key that matches a decoder in your vehicle.
PASS-Key@ 111 Operation
Your vehicle is equipped with PASS-Key@ Ill
(Personalized Automotive Security System)
theft-deterrent system. PASS-Key@
Ill is a passive
theft-deterrent system. This means you don’t have to do
anything special to arm or disarm the system. It works
when you insert or remove the key from the ignition.
When the PASS-Key@
Ill system senses that someone
is using the wrong key, it shuts down the vehicle’s
starter and fuel systems. The starter will not work and
fuel will stop being delivered
to the engine. Anyone
using a trial-and-error method to start the vehicle will
be
discouraged because of the high number of electrical
key codes.
When trying to start the vehicle
if the engine does not
start and the SECURITY light comes on, the key
may have a damaged transponder. Turn the ignition
off and try again.
If the engine still does not start, and the key appears
to be undamaged, try another ignition key. At this time,
you may also want to check the fuse, see Fuses
and Circuit Breakers
on page 5-97. If the engine still
does not start with the other key, your vehicle needs
service.
If your vehicle does start, the first key may
be faulty. See your dealer who can service the
PASS-Key@
Ill to have a new key made. In an
emergency, contact Pontiac Roadside Assistance.
See Roadside Assistance Program
on page 7-5 for
more information.
It is possible for the PASS-Key@
Ill decoder to learn
the transponder value of a new or replacement key.
Up to
10 additional keys may be programmed for
the vehicle. This procedure is for learning additional
keys only.
If all the currently programmed keys are lost
or do not operate, you must see your dealer or a
locksmith who can service PASS-Key@
Ill to have keys
made and programmed to the system.
See your dealer or a locksmith who can service
PASS-Key@
Ill to get a new key blank that is cut exactly
as the ignition key that operates the system.
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The HUD also shows the following lights when they are
lit on the instrument panel cluster:
Turn Signal Indicators
High-Beam Indicator Symbol
Low Fuel Symbol
The HUD will display CHECK GAGES when the
following items are lit on the instrument panel cluster:
Oil Warning Symbol
Coolant Temperature Symbol
Charging System Symbol
When the ignition key is turned to RUN, the entire HUD
image will come on. Then the Head-Up Display will
operate normally.
Notice: Although the HUD image appears to be
near the front
of the vehicle, do not use it as
a parking aid. The
HUD was not designed for that
purpose.
If you try to use it as such, you may
misjudge the distance and damage your vehicle.
When the HUD is on, the speedometer reading will be
displayed continually. The current radio station
or
CD track number will only be displayed for three
seconds after the radio or CD track status changes.
This will happen whenever one of the radio controls is
pressed, either on the radio itself or on the optional
steering wheel controls. To
adjust the HUD
so you can see it properly do the
following:
1. Adjust your seat, if necessary, to a comfortable
position.
2. Start the engine and adjust the HUD controls
located on the instrument panel, to the right
of
the steering wheel. Move the DIM thumbwheel up
or down to adjust brightness.
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Warning Lights, Gages and
Indicators
This part describes the warning lights and gages
that
may be on your vehicle. The pictures will help you
locate them.
Warning lights and gages can signal that something is
wrong before it becomes serious enough to cause
an expensive repair or replacement. Paying attention to
your warning lights and gages could also save you
or others from injury.
Warning lights come on when there may be or is a
problem with one of your vehicle’s functions.
As you will
see in the details on the next few pages, some
warning lights come
on briefly when you start the
engine just to let you know they’re working.
If you are
familiar with this section, you should not be alarmed
when this happens. Gages can indicate
when there may be or is a problem
with one of your vehicle’s functions. Often gages
and warning lights work together to let you know when
there’s a problem with your vehicle.
When one
of the warning lights comes on and stays on
when you are driving, or when one
of the gages shows
there may be a problem, check the section that tells
you what to do about it. Please follow this manual’s
advice. Waiting to do repairs can be costly
- and even
dangerous.
So please get to know your warning lights
and gages. They’re a big help.
Your vehicle may also have a Driver Information
Center (DIC) that works along with the warning lights
and gages. See Driver Information Center (DIC)
on page 3-38.
3-23

Malfunction indicator Lamp
Service Engine Soon Light in the
United States or Check Engine Light
in Canada
SERVICE
ENGINE SOON
United States
~~
Canada
Your vehicle is equipped with a computer which
monitors operation of the fuel, ignition and emission
control systems.
This system is called
OBD II (On-Board
Diagnostics-Second Generation) and is intended to
assure that emissions are at acceptable levels for the life
of the vehicle, helping to produce a cleaner environment. The SERVICE ENGINE SOON
or CHECK ENGINE
light
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.
Notice: Modifications 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 not covered by your warranty. This may
also result
in a failure to pass a required Emission
Inspection/Maintenance test.
3-32

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 light doesn’t come on, have it
repaired. This light will also come on during a
malfunction in one of two ways:
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.
0 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:
0 Reducing vehicle speed.
0 Avoiding hard accelerations.
Avoiding steep uphill grades.
0 If you are towing a trailer, reduce the amount of
cargo being hauled as soon as it is possible. 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. Find a safe place to park your vehicle.
Turn the key
off, wait at least 10 seconds and restart the
engine. If the light remains on steady, see
“If the Light Is
On Steady” following. If the light is still flashing, follow the
previous steps, and drive the vehicle
to your dealer or
qualified service center for service.
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. See Filling
Your Tank on page 5-7. 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 deep puddle of water?
If
so, your electrical system may be wet. The condition
will usually be corrected when the electrical system
dries out. A few driving trips should turn the light
off.
3-33

Are you low on fuel?
As your engine starts to run out of fuel, your engine
may not run as efficiently as designed since small
amounts of air are sucked into the fuel line causing
misfire. The system can detect this. Adding fuel should
correct this condition. Make sure to install the fuel
cap properly. See filling
Your Tank on page 5-7. It will
take a few driving trips to turn the light
off.
Have you recently changed brands of fuel?
If
so, be sure to fuel your vehicle with quality fuel. See
Gasoline Ocfane on page
5-5. Poor fuel quality will
cause your 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.
Emissions Inspection and Maintenance
Programs
Some state/provincial and local governments have or
may begin programs to inspect the emission control
equipment on your vehicle. Failure to pass this
inspection could prevent you from getting a vehicle
registration.
Here are some things you need to know to help your
vehicle pass an inspection:
Your vehicle will not pass this inspection
if the SERVICE
ENGINE SOON or CHECK ENGINE light is on or not
working properly.
Your vehicle will not pass this inspection
if the OBD
(on-board diagnostic) system determines that critical
emission control systems have not been completely
diagnosed by the system. The vehicle would be
considered not ready for inspection. This can happen
if
you have recently replaced your battery or if your
battery has run down. The diagnostic system is
designed to evaluate critical emission control systems
during normal driving. This may take several days
of routine driving.
If you have done this and your vehicle
still does not pass the inspection for lack of
OBD
system readiness, see your dealer or qualified service
center to prepare the vehicle for inspection.
3-34

Oil Pressure Light
United States
kPa
I I
Canada
the ignition to RUN. If it doesn’t come on with the
ignition on, you may have a problem with the fuse or
bulb. Have it fixed right away.
0 If you make a hard stop, the light may come on for
a moment. This is normal.
If you have a problem with your oil pressure, this light
may stay on after you start your engine, or come
on when you are driving.
This indicates that oil is not going through your engine
quickly enough to keep it lubricated. The engine
could be low on oil or could have some other oil
problem. Have it fixed right away.
The oil light could also come on in two other situations:
0 While the ignition is on but the engine is not
running, the light
will come on as a test to show you
it’s working. The light will go out when you turn
.
Do keep driving if the oi , ressure is low.
If you do, your engine can become so hot that
it catches fire. You or others could be burned.
Check your oil as soon
as possible and have
your vehicle serviced.
Notice: Damage to your engine from neglected oil
problems can be costly and is not covered by
your warranty.
3-35

Low Oil Level Light
LOW OIL
LEVEL
The engine is equipped
with an oil level monitoring
system. When the
ignition key is turned to
RUN, the LOW
OIL LEVEL
light will briefly flash.
If the light does not flash, have it fixed so it will be
ready to warn you
if there is a problem.
If the light stays on, stop the vehicle on a level surface
and turn the engine
off. Check the oil level using the
engine oil dipstick. See Engine
Oil on page 5-18.
The oil level monitoring system only checks the oil
level during the brief period when the ignition key is
between
RUN and START. It does not monitor engine
oil level while the engine is running. Additionally,
an oil level check is only performed
if the engine has
been turned
off for a considerable period of time,
allowing the oil normally in circulation to drain back
into the oil pan.
Security Light
This message is
displayed to monitor
the PASS-Key@
Ill
system. SECURITY
If the SECURITY message is displayed continuously
while driving, there may be a problem with the
PASS-Key@
Ill system. Your vehicle will not be protected
by PASS-Key@
Ill, and you should see your dealer for
service. For more information see
PASS-Key 111
on page 2- 16.
3-36