check engine CHEVROLET CORVETTE 2005 6.G User Guide

Notice:If you keep driving your vehicle with this
light on, after awhile, 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:Modications made to the engine,
transmission, 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.
This light should come on briey, as a check to show
you it is working, as you start the engine. 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 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 engine 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.
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If the Light Is On Steady
You also 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 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.Have you recently changed brands of fuel?
If so, be sure to fuel your vehicle with quality fuel. See
Gasoline Octane 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, 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.
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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.
To perform a Check Engine light bulb check with the
keyless ignition, make sure the transmitter fob is in the
passenger compartment. SeeIgnition Positions on
page 2-21. Press the bottom of the ACC button on the
instrument panel and hold the button down for ve
seconds. The instrument panel, including the Check
Engine light, will light up and the ignition will be on, but
the engine will not start — if you press the bottom of
the ACC button only briey, less than ve seconds, the
accessory mode will be turned on, but not the ignition.
After the bulb check, be sure to press and release
the ACC button again to turn the ignition off and avoid
draining the vehicle’s battery.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 GM dealer can prepare the
vehicle for inspection.
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Engine Oil Pressure Gage
The engine oil pressure gage shows the engine oil
pressure in psi (pounds per square inch) or kPa
(kilopascals) when the engine is running.
Oil pressure should be 20 to 80 psi (140 to 550 kPa). In
certain situations such as long, extended idles on hot
days, it could read as low as 6 psi (40 kPa) and still be
considered normal. It may vary with engine speed,
outside temperature and oil viscosity, but readings
above the shaded area show the normal operating
range. Readings in the shaded area tell you that
the engine is low on oil, or that you might have some
other oil problem. SeeEngine Oil on page 5-13.The engine oil pressure can also be displayed using the
GAGES button on the Driver Information Center (DIC).
SeeDriver Information Center (DIC) on page 3-49.
{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. United States
Canada
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BATTERY SAVER ACTIVE:When the vehicle has
detected that the battery voltage is dropping beyond a
reasonable point, the BATTERY SAVER ACTIVE
message will display. The battery saver system will start
reducing certain features of the vehicle that you may
not be able to notice. At the point that features are
disabled, this message is displayed. It means that the
vehicle is trying to save the charge in the battery.
Turn off unnecessary accessories to allow the battery to
recharge.
CHANGE ENGINE OIL:This message will appear
when the life of the engine oil has expired. See
Scheduled Maintenance on page 6-4. After an oil
change, the engine oil life system must be reset. See
“Engine Oil Life” underDIC Controls and Displays
on page 3-49. Also, seeEngine Oil on page 5-13and
Engine Oil Life System on page 5-16for more
information.
CHECK BRAKE FLUID:This message will appear, a
chime will sound and the brake system warning light on
the instrument panel cluster will be on if the ignition is
on to inform the driver that the brake uid level is
low. SeeBrake System Warning Light on page 3-38.
Have the brake system serviced by your GM dealer as
soon as possible. SeeBrakes on page 5-34.CHECK COOLANT LEVEL:This message will appear
when there is a low level of engine coolant. Have
the cooling system serviced by your GM dealer as soon
as possible. SeeEngine Coolant on page 5-21.
CHECK GAS CAP:If the gas cap has not been fully
tightened, this message will appear. You should
check your gas cap to ensure that it is on properly.
Once tightened, it will take at least one overnight park
to reset or clear this message. If there is a CHECK GAS
CAP message and a malfunction indicator lamp on in
the instrument panel cluster, you may need to see your
GM dealer for service. SeeMalfunction Indicator
Lamp on page 3-42for more information.
CHECK OIL LEVEL:Press the RESET button to
acknowledge that you have read the message and to
remove it from the display. The message will reappear
every 10 minutes until this condition changes. Once
the vehicle senses a change in the engine oil level, the
light will remain off.
You will hear two chimes when this message is
displayed. If this message appears after starting your
engine, your engine oil level may be too low. You
may need to add oil. SeeEngine Overheating on
page 5-24.
3-56

ENGINE PROTECTION REDUCE ENGINE RPM:You
will hear multiple chimes when this message is
displayed. This message will remain displayed and
active until the issue is resolved.
If the engine oil temperature exceeds 320°F (160°C),
this message is displayed. You should check the engine
coolant temperature and engine oil level. If your
engine is too hot, seeEngine Overheating on page 5-24.
Your vehicle may need service, so see your GM dealer.
You can monitor the oil temperature with the gages
button on the DIC.
HEADLAMPS SUGGESTED:If it is dark enough
outside and the headlamps and Twilight
Sentinel
®controls are off, this message will display.
This message informs the driver that turning on
the exterior lamps is recommended. It has become dark
enough outside to require the headlamps and/or
other exterior lamps.
HIGH TIRE PRESSURE:To acknowledge the warning,
press the RESET button. After you press the RESET
button, a message will reappear every 10 minutes until
this condition changes. This message indicates that
the pressure in one of your tires is higher than 42 psi
(290 kPa). Next to the HIGH TIRE PRESSURE
message, you can see either LEFT FRONT, RIGHT
FRONT, LEFT REAR or RIGHT REAR to indicate to you
which tire is higher than 42 psi (290 kPa). You can
receive more than one tire pressure message at a time.To read other messages that may have been sent at
the same time, press the 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 your Tire Loading Information
Label. SeeExtended Mobility Tires on page 5-56and
Ination - Tire Pressure on page 5-58.
HOT ENGINE 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 will
automatically resume. You can continue to drive
your vehicle. If this message continues to appear, have
the system repaired by your GM dealer as soon as
possible to avoid compressor damage.
ICE POSSIBLE:This message displays when the
outside air temperature is cold enough to create icy
road conditions.
LOW FUEL:This message displays when the fuel tank
is less than 10 percent full and the display is turned
off. A multiple chime will also sound when this message
is displayed. SeeFuel Gage on page 3-48.
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LOW OIL PRESSURE:If this message appears while
the engine is running, stop the engine and do not
operate it until the cause of low oil pressure is corrected.
Severe damage to the engine can result. A multiple
chime will sound when this message is displayed. See
Engine Oil on page 5-13.
LOW TIRE PRESSURE:You will hear multiple chimes
and the tire pressure light on the instrument panel
cluster will come on when this message is displayed.
SeeTire Pressure Light on page 3-42. To acknowledge
the warning, press the RESET button. After you
press the RESET button, a message will appear every
10 minutes until this condition changes. This message
indicates that the pressure in one of your tires is
less than 24 psi (164 kPa). Next to the LOW TIRE
PRESSURE message, you can see either LEFT
FRONT, RIGHT FRONT, LEFT REAR or RIGHT REAR
to indicate to you which tire is low on pressure. You
can receive more than one tire pressure message at a
time. To read other messages that may have been
sent at the same time, press the 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 your Tire Loading Information Label.
SeeExtended Mobility Tires on page 5-56andTire
Pressure Monitor System on page 5-60.
{CAUTION:
When the LOW TIRE PRESSURE or TIRE FLAT
message is displayed on the Driver Information
Center, your vehicle’s handling capabilities will
be reduced during severe maneuvers. The
active handling system will be affected. See
Active Handling System on page 4-10.Ifyou
drive too fast, you could lose control of your
vehicle. You or others could be injured. Do not
drive over 55 mph (90 km/h) when the LOW
TIRE PRESSURE or TIRE FLAT message is
displayed. Drive cautiously and check your tire
pressures as soon as you can.
MAXIMUM SPEED 80 MPH (129 km/h):To
acknowledge the warning, press the RESET button.
After you press the RESET button, a message will
reappear every 10 minutes until this condition changes.
This message indicates that a malfunction is present
in the selective real time damping system. The vehicle
speed will be limited to a value determined by the
vehicle when the shock absorber system has failed and
the shocks are in their full soft mode. Have your
vehicle serviced by your GM dealer as soon as possible.
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REDUCED ENGINE POWER:You will hear multiple
chimes when this message is displayed. To
acknowledge that you have read the message and to
remove it from the display, press the RESET button. The
message will reappear every ve minutes until this
condition changes.
If the Driver Information Center (DIC) displays the
REDUCED ENGINE POWER message and the CHECK
ENGINE light comes on, a noticeable reduction in the
vehicle’s performance may occur. If the REDUCED
ENGINE POWER message is displayed but there is no
reduction in performance, proceed to your destination.
The performance may be reduced the next time
the vehicle is driven.
The vehicle may be driven at a reduced speed while the
REDUCED ENGINE POWER message is displayed,
but acceleration and speed may be reduced. Anytime
the CHECK ENGINE light stays on, the vehicle
should be taken to your GM dealer as soon as possible
for diagnosis and repair.
Also, seeMalfunction Indicator Lamp on page 3-42.If
the REDUCED ENGINE POWER message is displayed
in combination with the COOLANT OVER
TEMPERATURE message, seeEngine Overheating on
page 5-24.SERVICE ACTIVE HANDLING SYSTEM:If the
SERVICE ACTIVE HANDLING SYSTEM message is
displayed, there is a problem with your Active Handling
System and your vehicle needs service. See your
GM dealer. The instrument cluster light will also be on
and a chime will sound. When this message is
displayed, the system is not working. Adjust your driving
accordingly. SeeActive Handling System on page 4-10
for more information.
SERVICE AIR CONDITIONING:This message displays
when the electronic sensors that control the air
conditioning and heating systems are no longer working.
Have the climate control system serviced by your
GM dealer if you notice a drop in heating and air
conditioning efficiency.
SERVICE ANTILOCK BRAKES:If the SERVICE
ANTILOCK BRAKES message is displayed when you
are driving, stop as soon as possible and turn the
ignition off. Then start the engine again to reset the
system. If the message stays on, or comes back
on again while you are driving, your vehicle is in need
of service. See your GM dealer. If the anti-lock
brake system warning light is on and the regular brake
system warning light is not on, you still have brakes,
but do not have anti-lock brakes. If the regular
brake system light is also on, you do not have anti-lock
brakes and there is a problem with your brakes. See
Anti-Lock Brake System Warning Light on page 3-39
andBrake System Warning Light on page 3-38.
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TRACTION SYSTEM – ON:You will hear a single
quick tone when this message is displayed. This
message is displayed when you decide to turn on the
Traction Control System by pressing the Active Handling
System console button on the console. This message
will shut off automatically on its own.
TRANSMISSION HOT IDLE ENGINE:You will hear
four chimes when this message is displayed. To
acknowledge this warning, press the RESET button.
After you press the RESET button, the message will be
displayed every 10 minutes until the condition changes.
If you do not press the RESET button, the message
remains on the display until the condition changes.
If the transmission uid temperature rises above 270°F
(132°C) or rises rapidly, this message is displayed.
The transmission may shift gears or apply the torque
converter clutch to reduce the uid temperature. Driving
aggressively or driving on long hills can cause the
transmission uid temperature to be higher than normal.
If this message appears, you may continue to drive at
a slower speed. You should also monitor the
transmission uid temperature and allow it to cool to at
least 230°F (110°C). The transmission uid temperature
can be monitored with the gages button on the DIC.SeeAutomatic Transmission Fluid on page 5-20. You
should also check the engine coolant temperature. If it is
also hot, seeEngine Overheating on page 5-24.
If the TRANSMISSION HOT IDLE ENGINE message is
displayed during normal vehicle operation on at
roads, your vehicle may need service. See your
GM dealer for an inspection.
TURN SIGNAL ON:If a turn signal is left on for
three-quarters of a mile (1.2 km), this message will
appear on the display and you will hear a chime. Move
the turn signal/multifunction lever to the off position.
To acknowledge this message, press the RESET button.
UNLATCH HEADER TO MOVE TOP:This message
will display and a chime will sound if you try to lower the
convertible top without rst unlocking the top. Move
the latch handle to unlock the convertible top. See
Convertible Top (Manual) on page 2-57orConvertible
Top (Power) on page 2-64.
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Audio System(s)
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. 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.
Notice:The chime signals related to seat belts,
parking brake, and other functions of your vehicle
operate through the GM radio/entertainment system.
If that equipment is replaced or additional
equipment is added to your vehicle, the chimes may
not work. Make sure that replacement or additional
equipment is compatible with your vehicle before
installing it.Figure out which audio system is in your vehicle, nd
out what your audio system can do, and how to operate
all of its controls.
Your vehicle may have a feature called Retained
Accessory Power (RAP). With RAP, the audio system
can be played even after the ignition is turned off.
SeeRetained Accessory Power (RAP) on page 2-22for
more information.
Setting the Time
Press the H or the M button to enter clock mode. Press
and hold H until the correct hour appears on the
display. Press and hold M until the correct minute
appears on the display.
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