light CHEVROLET IMPALA 2007 9.G Workshop Manual

Traction Control System (TCS)
Warning Light
For vehicles equipped
with the traction control
system, this warning
light should come
on briey when the
engine is started.
If the warning light does not come on then, have it
xed so it will be ready to warn you if there is a
problem. If it stays on, or comes on when you are
driving, there may be a problem with your traction
control system and your vehicle may need service.
When this warning light is on, the system will not
limit wheel spin. Adjust your driving accordingly.
If the traction control system warning light comes
on and stays on for an extended period of
time when the system is turned on, your vehicle
needs service. SeeTraction Control System (TCS)
on page 256for more information.
Engine Coolant Temperature
Warning Light
The engine coolant
temperature warning
light will come on when
the engine has
overheated.
If this happens you should pull over and turn off
the engine as soon as possible. SeeEngine
Overheating on page 323for more information.
Notice:Driving with the engine coolant
temperature warning light on could cause your
vehicle to overheat. SeeEngine Overheating
on page 323. Your vehicle could be damaged,
and it might not be covered by your warranty.
Never drive with the engine coolant
temperature warning light on.
This light will also come on briey when starting
your vehicle. If it does not, have your vehicle
serviced.
183

Engine Coolant Temperature Gage
This gage shows the engine coolant temperature.
If the gage pointer moves towards the “H”
(United States) or the shaded in thermostat
(Canada), it means that your engine coolant has
overheated. If you have been operating your
vehicle under normal driving conditions, you should
pull off the road, stop your vehicle and turn off
the engine as soon as possible.
SeeEngine Overheating on page 323for more
information.
Tire Pressure Light
This light comes on
briey when you turn
the ignition to RUN.
This light will also come on when one or more of
your tires are signicantly underinated.
A CHECK TIRE PRESSURE message in the
Driver Information Center (DIC) will accompany
the light. SeeDIC Warnings and Messages
on page 199for more information.
Stop and check your tires as soon as it is safe to
do so. If underinated, inate to the proper
pressure. SeeTires on page 351for more
information.
United StatesCanada
184

This light will ash for approximately 60 seconds
and then stay on if a problem is detected with
the Tire Pressure Monitor system.
SeeTire Pressure Monitor System on page 360
for more information.
Malfunction Indicator Lamp
Check Engine Light
Your vehicle has 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 check engine light
comes on to indicate that there is a problem and
service is required. Malfunctions often will beindicated 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 awhile, the emission controls
might not work as well, your vehicle’s fuel
economy might not be as good, and the engine
might not run as smoothly. This could lead
to costly repairs that might not be covered by
your warranty.
Notice:Modications 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. Modications 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. SeeAccessories
and Modifications on page 296.
185

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 does not
come on, have it repaired. This light will also
come on during a malfunction in one of two ways:
Light Flashing— A misre condition has
been detected. A misre increases vehicle
emissions and may damage the emission
control system on your vehicle. Diagnosis
and service may be required.
Light On Steady— An emission control
system malfunction has been detected on
your vehicle. 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
If you are towing a trailer, reduce the amount
of cargo being hauled as soon as it is
possibleIf the light stops ashing and remains on steady,
see “If the Light Is On Steady” following.
If the light continues to ash, 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 ashing, follow the
previous steps, and see your dealer for service as
soon as possible.
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. SeeFilling the Tank on page 302.
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.
186

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.
Have you recently changed brands of fuel?
If so, be sure to fuel your vehicle with quality fuel.
SeeGasoline Octane on page 298. 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, misring, 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, your dealer can check the vehicle.
Your dealer has the proper test equipment and
diagnostic tools to x 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
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, your dealer
can prepare the vehicle for inspection.
187

Oil Pressure Light
{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 your warranty. Always follow
the maintenance schedule in this manual for
changing engine oil.This light tells you there
could be a problem with
the engine oil pressure.
The light goes on when you turn your key to RUN or
START. It goes off once you start your engine. That
is a check to be sure the light works. If it does not
come on, be sure to have it xed so it will be there
to warn you if something goes wrong.
When the light comes on and stays on, it means
that oil is not owing through your engine properly.
You could be low on oil and you might have
some other system problem.
188

Security Light
For information
regarding this light,
seeTheft-Deterrent
Systems on page 107.
Fog Lamp Light
The fog lamp light will
come on when the fog
lamps are in use.
The light will go out when the fog lamps are
turned off. SeeFog Lamps on page 163for more
information.
Cruise Control Light
This light comes on
whenever you set the
cruise control.
The light goes out when the cruise control is
turned off. SeeCruise Control on page 157for
more information.
Highbeam On Light
This light comes on
when the high-beam
headlamps are in use.
SeeHeadlamp High/Low-Beam Changer on
page 155for more information.
189

AUTOMATIC LIGHT CONTROL OFF
This message displays when the automatic
headlamps are turned off. SeeExterior Lamps on
page 160for more information.
AUTOMATIC LIGHT CONTROL ON
This message displays when the automatic
headlamps are turned on. SeeExterior Lamps on
page 160for more information.
BATTERY SAVER ACTIVE
This message displays when the system detects
that the battery voltage is dropping beyond a
reasonable level. The battery saver system starts
reducing certain features of the vehicle that
you may be able to notice. At the point that the
features are disabled, this message is displayed.
It means that the vehicle is trying to save the
charge in the battery.Turn off all unnecessary accessories to allow the
battery to recharge.
The normal battery voltage range is
11.5 to 15.5 volts.
CHANGE ENGINE OIL SOON
This message displays when service is required
for the vehicle. See your dealer. SeeEngine Oil on
page 310andScheduled Maintenance on
page 408for more information.
Acknowledging the CHANGE ENGINE OIL SOON
message will not reset the OIL LIFE REMAINING.
That must be done at the OIL LIFE screen
under the vehicle information menu. See “Oil Life”
underDIC Operation and Displays on page 191
andEngine Oil Life System on page 314.
200

CHECK TIRE PRESSURE
This message displays when the tire pressure in
one of the tires needs to be checked. This message
also displays LEFT FRONT, RIGHT FRONT, LEFT
REAR, or RIGHT REAR to indicate which tire needs
to be checked. You can receive more than one tire
pressure message at a time. To read the other
messages that may have been sent at the same
time, press the set/reset button. If a tire pressure
message appears on the DIC, stop as soon as you
can. Have the tire pressures checked and set to
those shown on the Tire Loading Information label.
SeeTires on page 351,Loading Your Vehicle on
page 277, andInation - Tire Pressure on
page 359. The DIC display also shows the tire
pressure values for the front and rear tires by
pressing the vehicle information button. SeeDIC
Operation and Displays on page 191. If the tire
pressure is low, the low tire pressure warning light
comes on. SeeTire Pressure Light on page 184.
DRIVER DOOR OPEN
This message displays when the driver’s door is
not closed properly. When this message appears,
make sure that the driver’s door is closed
completely.
ENGINE HOT A/C
(Air Conditioning) OFF
This message displays when the engine coolant
becomes hotter than the normal operating
temperature. To avoid added strain on a hot engine,
the air conditioning compressor is automatically
turned off. When the coolant temperature returns to
normal, the A/C operation automatically resumes.
You can continue to drive your vehicle. If this
message continues to appear, have the system
repaired by your dealer as soon as possible to
avoid compressor damage.
201

ERROR
This message displays while viewing the odometer
or trip odometers if there is a problem with the
instrument panel cluster. See your dealer for
service.
FUEL LEVEL LOW
This message displays when your vehicle is low
on fuel. Rell the fuel tank as soon as possible.
SeeFuel Gage on page 190andFilling the Tank
on page 302for more information.
HOOD OPEN
If your vehicle has the remote start feature, this
message displays when the hood is not closed
properly. When this message appears, make sure
that the hood is closed completely. SeeHood
Release on page 305.
ICE POSSIBLE DRIVE WITH CARE
This message displays when the outside air
temperature is cold enough to create icy road
conditions. Adjust your driving accordingly.
LEFT REAR DOOR OPEN
This message displays when the driver’s side rear
door is not closed properly. When this message
appears, make sure that the driver’s side rear door
is closed completely.
OIL PRESSURE LOW STOP ENGINE
Notice:If you drive your vehicle while
the engine oil pressure is low, severe engine
damage may occur. If a low oil pressure
warning appears on the Driver Information
Center (DIC), stop the vehicle as soon as
possible. Do not drive the vehicle until the
cause of the low oil pressure is corrected. See
Engine Oil on page 310for more information.
This message displays when the vehicle’s
engine oil pressure is low. The oil pressure light
also appears on the instrument panel cluster.
SeeOil Pressure Light on page 188.
Stop the vehicle immediately, as engine damage
can result from driving a vehicle with low oil
pressure. Have the vehicle serviced by your dealer
as soon as possible when this message is
displayed.
203