check engine light CHEVROLET CORVETTE 2012 6.G Owners Manual

Black plate (22,1)Chevrolet Corvette Owner Manual - 2012
1-22 In Brief
The vehicle has an Active Handling
System that helps maintain
directional control of the vehicle in
difficult driving conditions. See
Active Handling System on
page 9‑38.
The vehicle may have Competitive
Driving Mode (except ZR1),
Performance Traction
Management (Z06, ZR1), and
Launch Control systems designed to
allow increased performance while
accelerating and cornering. See
Competitive Driving Mode on
page 9‑39.Tire Pressure Monitor
This vehicle may have a Tire
Pressure Monitor System (TPMS).
The TPMS warning light alerts you
to a significant loss in pressure of
one of the vehicle's tires. If the
warning light comes on, stop as
soon as possible and inflate the
tires to the recommended pressure
shown on the Tire and Loading
Information label. SeeVehicle Load
Limits on page 9‑14. The warning
light will remain on until the tire
pressure is corrected.
During cooler conditions, the low tire
pressure warning light may appear
when the vehicle is first started and
then turn off. This may be an early indicator that the tire pressures are
getting low and the tires need to be
inflated to the proper pressure.
The TPMS does not replace normal
monthly tire maintenance. It is the
driver
’s responsibility to maintain
correct tire pressures.
See Tire Pressure Monitor System
on page 10‑68.Z06, Z16, and ZR1
Features
Checking Engine Oil
Z06, ZR1, and manual transmission
Z16 (Grand Sport) coupe models
have a high performance dry sump
lubrication system. This system
operates differently than a standard
engine lubrication system. See
Engine Oil on page 10‑16.
You should check the oil level only
after the engine has been
thoroughly warmed up and then
shut off for at least five minutes.
This ensures that the oil level
reading obtained will be accurate.

Black plate (15,1)Chevrolet Corvette Owner Manual - 2012
Keys, Doors, and Windows 2-15
Immobilizer
SeeRadio Frequency Statement on
page 13‑21 for information
regarding Part 15 of the Federal
Communications Commission (FCC)
rules and Industry Canada
Standards RSS-GEN/210/220/310.
Immobilizer Operation
The vehicle has a passive
theft-deterrent system.
The system is automatically armed
when the ignition is turned off.
The immobilization system is
disarmed when the ignition is turned
to OFF/ACCESSORY or START and
a valid transmitter is found in the
vehicle.
You do not have to manually arm
or disarm the system.
The security light comes on if
there is a problem with arming or
disarming the theft-deterrent
system. The system has one or more RKE
transmitters that are matched to an
immobilizer control unit in the
vehicle. Only a correctly matched
RKE transmitter starts the vehicle.
The vehicle may not start if the
RKE transmitter is damaged.
If the engine does not start and the
security light comes on, there may
be a problem with the immobilizer
system. Press the START button
again.
If the vehicle does not start and the
RKE transmitter appears to be
undamaged, try another RKE
transmitter. Or, place the transmitter
in the transmitter pocket. See
“NO
FOBS DETECTED” underKey and
Lock Messages on page 5‑43 for
additional information. Check the
fuse. See Fuses and Circuit
Breakers on page 10‑51. If the
engine still does not start with the
other transmitter, the vehicle needs
service. If the engine does start, the
first transmitter may be faulty. See your dealer or have a new RKE
transmitter programmed to the
vehicle.
The immobilizer system can learn
new or replacement RKE
transmitters. Up to four RKE
transmitters can be programmed for
the vehicle. To program additional
transmitters, see
“Matching
transmitter(s) to Your Vehicle” under
Remote Keyless Entry (RKE)
System Operation on page 2‑3.
Do not leave the key or device
that disarms or deactivates the
theft-deterrent system in the vehicle.

Black plate (21,1)Chevrolet Corvette Owner Manual - 2012
Seats and Restraints 3-21
WARNING (Continued)
Even if the vehicle appears to be
drivable after a moderate crash,
there may be concealed damage
that could make it difficult to
safely operate the vehicle.
Use caution if you should attempt
to restart the engine after a crash
has occurred.
In many crashes severe enough to
inflate the airbag, windshields are
broken by vehicle deformation.
Additional windshield breakage may
also occur from the front outboard
passenger airbag.
.Airbags are designed to inflate
only once. After an airbag
inflates, you will need some
new parts for the airbag system.
If you do not get them, the
airbag system will not be there
to help protect you in another
crash. A new system will include
airbag modules and possibly other parts. The service manual
for the vehicle covers the need
to replace other parts.
.The vehicle has a crash sensing
and diagnostic module which
records information after a
crash. See
Vehicle Data
Recording and Privacy on
page 13‑20 andEvent Data
Recorders on page 13‑20.
.Let only qualified technicians
work on the airbag system.
Improper service can mean that
the airbag system will not work
properly. See your dealer
for service.
Passenger Sensing
System
The vehicle has a passenger
sensing system for the front
outboard passenger position. The
passenger airbag status indicator
will light in the rearview mirror when
the vehicle is started.
United States
Canada and Mexico
The words ON and OFF, or the
symbol for on and off, will be visible
during the system check. When the
system check is complete, either the
word ON or OFF, or the symbol for
on or off, will be visible. See
Passenger Airbag Status Indicator
on page 5‑18.

Black plate (8,1)Chevrolet Corvette Owner Manual - 2012
5-8 Instruments and Controls
Warning Lights,
Gauges, and
Indicators
Warning lights and gauges 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 gauges could
prevent injury.
Warning lights come on when there
could be a problem with a vehicle
function. Some warning lights come
on briefly when the engine is started
to indicate they are working.Gauges can indicate when there
could be a problem with a vehicle
function. Often gauges 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 gauges
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.

Black plate (17,1)Chevrolet Corvette Owner Manual - 2012
Instruments and Controls 5-17
Voltmeter Gauge
Base and Z06, Metric and English
The voltmeter shows the voltage
output of the battery. It shows the
voltage output of the charging
system while the engine is running. The reading changes as the rate of
charge changes (with engine speed,
for example), but if the voltmeter
reads at 9 volts or below, the
instrument panel cluster and other
systems may shut down. The Driver
Information Center (DIC) reads
BATTERY VOLTAGE LOW when
the vehicle is at 10 volts or below.
Have it checked right away. Driving
with the voltmeter reading at
10 volts or below could drain the
battery and disable the vehicle.
Safety Belt Reminders
When the engine is started, this light
flashes and a chime may come on
to remind the driver to fasten their
safety belt. Then the light stays on
solid until the belt is buckled.
This cycle may continue several
times if the driver remains or
becomes unbuckled while the
vehicle is moving.
If the driver safety belt is buckled,
neither the light nor the chime
comes on.

Black plate (18,1)Chevrolet Corvette Owner Manual - 2012
5-18 Instruments and Controls
Airbag Readiness Light
The system checks the airbag's
electrical system for possible
malfunctions. If the light stays on
it indicates there is an electrical
problem. The system check
includes the airbag sensor(s),
the passenger sensing system, the
pretensioners, the airbag modules,
the wiring, and the crash sensing
and diagnostic module. For more
information on the airbag system,
seeAirbag System on page 3‑15.
The airbag readiness light flashes
for a few seconds when the engine
is started. If the light does not come
on then, have it fixed immediately.
{WARNING
If the airbag readiness light stays
on after the vehicle is started or
comes on while driving, it means
the airbag system might not be
working properly. The airbags in
the vehicle might not inflate in a
crash, or they could even inflate
without a crash. To help avoid
injury, have the vehicle serviced
right away.
If there is a problem with the airbag
system, an airbag Driver Information
Center (DIC) message can also
come on. See Vehicle Messages on
page 5‑36 for more information.
Passenger Airbag Status
Indicator
The vehicle has the passenger
sensing system. See Passenger
Sensing System on page 3‑21 for
important safety information. The
rearview mirror has a passenger
airbag status indicator.
United States

Black plate (19,1)Chevrolet Corvette Owner Manual - 2012
Instruments and Controls 5-19
Canada and Mexico
When the vehicle is started, the
passenger airbag status indicator
will light ON and OFF, or the symbol
for on and off, for several seconds
as a system check. Then, after
several more seconds, the status
indicator will light either ON or OFF,
or the on or off symbol, to let you
know the status of the front
outboard passenger frontal and
seat-mounted side impact airbags.
If the word ON or the on symbol is
lit on the passenger airbag status
indicator, it means that the front
outboard passenger frontal airbag
and seat-mounted side impact
airbag are allowed to inflate. 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 front outboard
passenger frontal airbag and
seat-mounted side impact airbag.
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 for service.
{WARNING
If the airbag readiness light ever
comes on and stays on, it means
that something may be wrong
with the airbag system. To help
avoid injury to yourself or others,
have the vehicle serviced right
away. See
Airbag Readiness
Light on page 5‑18 for more
information, including important
safety information.
Malfunction
Indicator Lamp
A computer system called OBD II
(On-Board Diagnostics-Second
Generation) monitors the operation
of the vehicle to ensure emissions
are at acceptable levels, to produce
a cleaner environment. This light
comes on when the vehicle is
placed in Service Only Mode, as a
check to show it is working. If it
does not, have the vehicle serviced
by your dealer. See Ignition
Positions on page 9‑19 for more
information.
If the malfunction indicator lamp
comes on and stays on while the
engine is running, this indicates that
there is an OBD II problem and
service is required.

Black plate (20,1)Chevrolet Corvette Owner Manual - 2012
5-20 Instruments and Controls
Malfunctions often are indicated by
the system before any problem is
apparent. Being aware of the light
can prevent more serious damage
to the vehicle. This system assists
the service technician in correctly
diagnosing any malfunction.
Notice:If the vehicle is
continually driven with this light
on, the emission controls might
not work as well, the vehicle 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 the vehicle warranty.
Notice: Modifications made to the
engine, transmission, exhaust,
intake, or fuel system of the
vehicle or the replacement of the
original tires with other than
those of the same Tire
Performance Criteria (TPC) can
affect the vehicle's emission
controls and can cause this light
to come on. Modifications to
these systems could lead to
costly repairs not covered by the vehicle warranty. This could
also result in a failure to pass a
required Emission Inspection/
Maintenance test. See
Accessories and Modifications on
page 10‑4.
This light comes on during a
malfunction in one of two ways:
Light Flashing:
A misfire condition
has been detected. A misfire
increases vehicle emissions and
could damage the emission control
system on the vehicle. Diagnosis
and service might be required.
The following can prevent more
serious damage to the vehicle:
.Reduce vehicle speed.
.Avoid hard accelerations.
.Avoid steep uphill grades.
If the light continues to flash,
stop and park the vehicle.
Turn the vehicle off , wait at least
10 seconds, and restart the engine.
If the light is still flashing, follow the
previous steps and see your dealer
for service as soon as possible. Light On Steady:
An emission
control system malfunction has
been detected on the vehicle.
Diagnosis and service might
be required.
The following may correct an
emission system malfunction:
.Check that the fuel cap is fully
installed. See Filling the Tank on
page 9‑51. The diagnostic
system can determine if the
fuel cap has been left off or
improperly installed. A loose or
missing fuel cap allows fuel to
evaporate into the atmosphere.
A few driving trips with the cap
properly installed should turn
the light off.

Black plate (21,1)Chevrolet Corvette Owner Manual - 2012
Instruments and Controls 5-21
.Check that good quality fuel is
used. Poor fuel quality causes
the engine not to run as
efficiently as designed and may
cause: stalling after start-up,
stalling when the vehicle is
changed into gear, misfiring,
hesitation on acceleration,
or stumbling on acceleration.
These conditions might go away
once the engine is warmed up.
If one or more of these
conditions occurs, change the
fuel brand used. It will require at
least one full tank of the proper
fuel to turn the light off.See Recommended Fuel on
page 9‑48.
If none of the above have made the
light turn off, your dealer can check
the vehicle. The dealer has the
proper test equipment and
diagnostic tools to fix any
mechanical or electrical problems
that might have developed.Emissions Inspection and
Maintenance Programs
Some local governments may have
programs to inspect the on-vehicle
emission control equipment. For the
inspection, the emission system test
equipment is connected to the
vehicle’s Data Link
Connector (DLC).
The DLC is under the instrument
panel to the left of the steering
wheel. See your dealer if assistance
is needed.
The vehicle may not pass
inspection if:
.The malfunction indicator lamp is
on with the engine running, or if
the vehicle is placed in Service
Only Mode and the malfunction indicator lamp does not come
on. See your dealer for
assistance in verifying proper
operation of the malfunction
indicator lamp.
.The OBD II (On-Board
Diagnostics) system determines
that critical emission control
systems have not been
completely diagnosed. The
vehicle would be considered not
ready for inspection. This can
happen if the 12-volt battery has
recently been replaced or 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 this has been done and the
vehicle still does not pass the
inspection for lack of OBD II
system readiness, your dealer
can prepare the vehicle for
inspection.

Black plate (22,1)Chevrolet Corvette Owner Manual - 2012
5-22 Instruments and Controls
Brake System Warning
Light
The vehicle brake system consists
of two hydraulic circuits. If one
circuit is not working, the remaining
circuit can still work to stop the
vehicle. For normal braking
performance, both circuits need
to be working.
MetricEnglish
This light comes on briefly while
starting the engine. If it does not
come on, have it fixed so it is ready
to warn if there is a problem.
{WARNING
The brake system might not be
working properly if the brake
system warning light is on.
Driving with the brake system
warning light on can lead to a
crash. If the light is still on after
the vehicle has been pulled off
the road and carefully stopped,
have the vehicle towed for
service.
If this warning light stays on after
the engine is started, the parking
brake may still be set or there
could be a brake problem. Refer to
Parking Brake on page 9‑36 to see
if it is set. If the parking brake is
not set, have the brake system
inspected right away.
If the light comes on while driving
and a CHECK BRAKE FLUID
message shows on the DIC, pull off
the road and stop carefully. The
pedal may be harder to push or the
pedal may go closer to the floor. It may take longer to stop. If the
light is still on, have the vehicle
towed for service. See
Towing the
Vehicle on page 10‑86 andBrake
System Messages on page 5‑37 for
more information.
Antilock Brake System
(ABS) Warning Light
For vehicles with the Antilock Brake
System (ABS), this light comes on
briefly when the engine is started.
If it does not, have the vehicle
serviced by your dealer. If the
system is working normally the
indicator light then goes off.