2008 PONTIAC G8 check engine light

Warning Lights,
Gages, and Indicators
This section describes the warning
lights and gages on the vehicle.
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 the
warning lights and gages could
prevent injury.
Warning lights come on when there
may be or is a problem with one
of the vehicle’s functions. Some
warning lights come on briey when
the engine is started to indicate
they are working.Gages can indicate when there may
be or is a problem with one of the
vehicle’s functions. Often gages and
warning lights work together to
indicate a problem with the vehicle.
When one of the warning lights
comes on and stays on while
driving, or when one of the gages
shows there may be a problem,
check the section that explains what
to do. Follow this manual’s advice.
Waiting to do repairs can be
costly and even dangerous.
4-10 Instruments and Controls
2008 - Pontiac G8 Owner Manual

{CAUTION
Even though the passenger
sensing system is designed to
turn off the right front
passenger’s frontal airbag if the
system detects a rear-facing
child restraint, no system is
fail-safe, and no one can
guarantee that an airbag will
not deploy under some unusual
circumstance, even though it is
turned off. We recommend that
rear-facing child restraints be
secured in the rear seat, even if
the airbag is off.
If the word OFF or the off symbol is
lit on the passenger airbag status
indicator, it means that the
passenger sensing system has
turned off the right front passenger
frontal airbag. SeePassenger
Sensing System on page 1-26for
more information, including
important safety information.If, after several seconds, both status
indicator lights remain on, or if
there are no lights at all, there may
be a problem with the lights or
the passenger sensing system. See
your dealer/retailer for service.
{CAUTION
If the airbag readiness light in
the instrument panel cluster
ever comes on and stays on, it
means that something may be
wrong with the airbag system.
If this ever happens, have the
vehicle serviced promptly,
because an adult-size person
sitting in the right front
passenger’s seat may not have
the protection of the airbag(s).
SeeAirbag Readiness Light on
page 4-13for more on this,
including important safety
information.
Voltmeter Gage
The voltmeter shows the voltage
output of your battery.
It is located in the center of the
instrument panel.
Charging System Light
This light will come on briey when
you turn on the ignition, and the
engine is not running, as a check to
show it is working. Then it should
go out when the engine is started.
If the light comes on and an
Alternator message on the Driver
Information Center (DIC) stays
on, you may have a problem with
the electrical charging system. Have
it checked by your dealer/retailer.
Instruments and Controls 4-15
2008 - Pontiac G8 Owner Manual

Antilock Brake System
(ABS) Warning Light
For vehicles with the Antilock Brake
System (ABS), this light will come
on briey, as a check, when
you start your vehicle.
If it does not, have your vehicle
serviced so that the light works
properly when it needs to.
If the light and a message in the
DIC stays on longer than a few
seconds after you start your engine,
or comes on and stays on while
you are driving, try resetting
the system. To reset the system:
1. If you are driving, pull over when
it is safe to do so.
2. Place the vehicle in PARK (P).
3. Turn off the ignition.
4. Then restart the engine.If the light remains on after resetting
the system or comes on again
while driving, your vehicle needs
service. If the ABS light is on,
but the regular brake system
warning light is not on, the antilock
brakes are not working properly,
but the regular brakes are still
functioning. Have your vehicle
serviced right away. If both brake
lights are on, you do not have
antilock brakes, and there’s a
problem with your regular brakes as
well. Have your vehicle towed for
service. SeeTowing Your Vehicle
on page 9-84.
The ABS Fault message will remain
until
3(Trip/Fuel) or8(Enter)
are pressed, but the warning
light will remain until the problem is
xed. SeeDIC Warnings and
Messages on page 4-27for more
information.
Engine Coolant
Temperature Gage
This gage shows the engine coolant
temperature. If the gage pointer
moves into the red area, the engine
is too hot. It means that the engine
has overheated. Pull off the road,
stop the vehicle, and turn off the
engine as soon as possible. See
Engine Overheating on page 9-16.
Instruments and Controls 4-17
2008 - Pontiac G8 Owner Manual

Tire Pressure Light
TPMS Light
This light comes on briey when the
engine is started and provides
information about tire pressures and
the Tire Pressure Monitoring System.
When the Light is Solid
This light will also come on when
one or more of your tires are
signicantly underinated. A CHECK
TIRE PRESSURE DIC message
will accompany the light.
SeeDIC Warnings and Messages
on page 4-27for more information.Stop and check your tires as soon as
it is safe to do so. If underinated,
inate to the proper pressure. See
Tires on page 9-39for more
information.
When the Light Flashes First and
Then is Solid
This indicates that there may be a
problem with the Tire Pressure
Monitor System.
The light ashes for about a minute
and stays on solid for the
remainder of the ignition cycle. This
sequence will repeat with every
ignition cycle. SeeTire Pressure
Monitor System on page 9-49
andTire Pressure Monitor Operation
on page 9-51for more information.
Malfunction
Indicator Lamp
Check Engine Light
A computer system called OBD II
(On-Board Diagnostics-Second
Generation) monitors operation of
the fuel, ignition, and emission
control systems. It makes sure that
emissions are at acceptable
levels for the life of the vehicle,
helping to produce a cleaner
environment.
This light comes on briey, as a
check to show it is working,
when the ignition is turned to
ON/RUN. If the light does not come
on, see your dealer/retailer.
If the light stays on it indicates that
there is an OBD II problem and
service is required.
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2008 - Pontiac G8 Owner Manual

If you just drove through a deep
puddle of water, your vehicle’s
electrical system might be
wet. The condition is usually
corrected when the electrical
system dries out. A few driving
trips should turn the light off.
If you recently changed brands of
fuel, be sure to fuel your vehicle
with quality fuel. SeeGasoline
Octane on page 8-33. Poor
fuel quality causes the engine
not to run as efficiently as
designed. You might notice this
as stalling after start-up,
stalling when you put the vehicle
into gear, misring, hesitation
on acceleration, or stumbling on
acceleration — these conditions
might go away once the
engine is warmed up.
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 have made
the light turn off, your dealer/retailer
can check the vehicle. Your
dealer/retailer has the proper test
equipment and diagnostic tools to
x any mechanical or electrical
problems that might have
developed.
Emissions Inspection and
Maintenance Programs
Some state/provincial and local
governments have or might begin
programs to inspect the emission
control equipment on your vehicle.
Failure to pass this inspection
could prevent getting a vehicle
registration.Here are some things to know to
help your vehicle pass an
inspection:
Your vehicle will not pass this
inspection if the 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
the battery or if the battery has
run down. The diagnostic system
is designed to evaluate critical
emission control systems
during normal driving. This can
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, your
dealer/retailer can prepare
the vehicle for inspection.
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2008 - Pontiac G8 Owner Manual

Oil Pressure Gage
The gage shows the engine oil
pressure.
It is located in the center of the
instrument panel.
{CAUTION
Do not keep driving if the oil
pressure is low. If you do, your
engine can become so hot that
it catches re. You or others
could be burned. Check your
oil as soon as possible and
have your vehicle serviced.
Notice:Lack of proper engine oil
maintenance may damage the
engine. The repairs would not be
covered by the vehicle warranty.
Always follow the maintenance
schedule in this manual for
changing engine oil.
Fuel Gage
The fuel gage shows about how
much fuel you have left, when the
ignition is on.
When the indicator nears empty, the
low fuel warning light will come
on and along with a chime. There is
still a little fuel left, but you should
refuel soon.Here are four things that some
owners ask about. These are normal
and do not indicate a problem
with your fuel gage:
At the service station, the gas
pump shuts off before the
gage reads full.
It takes a little more or less fuel
to ll up than the gage indicated.
The indicator moves a little when
you turn a corner or speed up.
The gage will continue to show
the remaining fuel when the
ignition is turned off.
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2008 - Pontiac G8 Owner Manual

{Alarm Activated
This message is displayed when the
content theft-deterrent system
was activated by an attempted
break-in. The messages may also
include the location on the
vehicle where the break-in was
attempted. SeeContent
Theft-Deterrent on page 2-13for
more information.
"Alternator
This message is displayed if there is
a problem with the battery charging
system. The charging system
light may also come on in the
instrument panel cluster. See
Charging System Light on
page 4-15. Driving while this
message is on could drain the
battery. Turn off all unnecessary
accessories. Have the electrical
system checked as soon as
possible. See your dealer/retailer.
Battery Saver Mode On
This message is displayed when the
battery voltage level is low.
$Brake
This message is displayed if there is
a problem with the brake system.
The Brake System Warning
light may also come on in the
instrument panel cluster. SeeBrake
System Warning Light on
page 4-16. When this message is
on, stop the vehicle on the side
of the road. Do not continue driving
until you know that braking is
possible or that the cause of the
problem has been corrected,
see your dealer/retailer. This
message also indicates low brake
uid. Check the brake uid level.
SeeBrakes on page 9-24.
*Check Engine
If this message and the Malfunction
Indicator Lamp come on and
stay on when driving, the system
may require servicing. Although the
vehicle may still be drivable and
not require towing, take the vehicle
to your dealer/retailer as soon
as possible. If this message comes
on when the Malfunction Indicator
Lamp is ashing, reduce the
vehicle’s speed and load until the
lamp stops ashing, then take
the vehicle to your dealer/retailer as
soon as possible. SeeMalfunction
Indicator Lamp on page 4-18
for more information.
:Check Oil
This message is displayed if the oil
pressure or oil level is low. Stop
when safe, turn off the engine and
check the engine oil level. See
Engine Oil on page 9-8. Do not run
the engine when this warning is
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2008 - Pontiac G8 Owner Manual

Notice:Before adding any sound
equipment to your vehicle, such
as an audio system, CD player,
CB radio, mobile telephone, or
two-way radio, make sure that it
can be added by checking with
your dealer/retailer. Also, check
federal rules covering mobile
radio and telephone units.
If sound equipment can be added,
it is very important to do it
properly. Added sound equipment
may interfere with the operation of
your vehicle’s engine, radio, or
other systems, and even damage
them. Your vehicle’s systems
may interfere with the operation
of sound equipment that has been
added.
The vehicle has Retained Accessory
Power (RAP), and the audio system
can be played after the ignition is
turned off. SeeRetained Accessory
Power (RAP) on page 8-3for more
information.Setting the Clock
Radio with Single CD Player
The time and date can be adjusted
when the radio is either on or
off, press
Gto display the date.
To adjust the time and date:
1. Press and hold
Guntil the
display shows the Set Clock
screen and the hour display
ashes.
2. Turn the volume knob to adjust
the hour.
3. Press the volume knob and the
minute display will ash to
adjust the minutes.
4. Turn the volume knob to adjust
the minutes.
5. Repeat these steps to adjust the
month, date, and year.
6. Press
Gto save the settings.
If no adjustments are made
for eight seconds, the radio will
automatically save the settings.
Radio with Six-Disc CD Player
The time and date can be adjusted
when the radio is either on or
off, press
Gto display the date.
To adjust the time and date:
1. Press and hold
Gfor more than
two seconds to display the
Options menu.
2. Turn the MENU knob to highlight:
Hour, Minute, Date, Month,
and Year.
3. Highlight Hour and Press the
MENU knob.
4. Turn the MENU knob to adjust
the hours.
5. Press the MENU knob to return
to the Options menu.
6. Repeat steps 2 through 5 to
adjust the minutes, date,
month, and year.
7. Press
Gto save the settings.
If no adjustments are made for
eight seconds, the radio will
automatically save the settings.
6-2 Infotainment
2008 - Pontiac G8 Owner Manual