2012 CHEVROLET CORVETTE C6 check engine light

Black plate (36,1)Chevrolet Corvette Owner Manual - 2012
5-36 Instruments and Controls
SERVICE CHARGING SYSTEM
If this message displays while you
are driving, there may be a problem
with the electrical charging system.
It could mean that there is a loose
or broken drive belt or that there is
another electrical problem. Have the
vehicle checked right away by your
dealer. Driving while this message is
on could drain the battery.
If you must drive a short distance
with the message on, be certain to
turn off the vehicle's accessories,
such as the radio and air
conditioner.
Multiple chimes sound when this
message is displayed.
To acknowledge the message, press
the RESET button. The message
reappears every 10 minutes until
this condition changes.
Brake System Messages
ABS (Antilock Brake System)
ACTIVE
This message displays when the
Antilock Brake System (ABS) is
adjusting brake pressure to help
avoid a braking skid.
Slippery road conditions may exist if
this message is displayed, so adjust
your driving accordingly. The
message stays on for a few
seconds after the system stops
adjusting brake pressure. See
Antilock Brake System (ABS) on
page 9‑35for more information.
CHANGE BRAKE PADS
On vehicles with electronic brake
pad wear sensors, this message will
be displayed when the pads are
worn. See your dealer for service.
CHECK BRAKE FLUID
This message displays, a sound
will be heard, and the brake
system warning light on the
instrument panel cluster turns on
if the ignition is on to inform the
driver that the brake fluid level is
low. SeeBrake System Warning
Light on page 5‑21. Have the brake
system serviced by your dealer as
soon as possible. See Brakes on
page 10‑34.
SERVICE ANTILOCK BRAKES
If this message displays while 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, the vehicle is in
need of service. See your dealer.
If the antilock brake system (ABS)
warning light is on and the regular
brake system warning light is not
on, you still have brakes, but do not

Black plate (40,1)Chevrolet Corvette Owner Manual - 2012
5-40 Instruments and Controls
ENGINE PROTECTION
REDUCE ENGINE RPM
This message displays if the engine
oil temperature exceeds 160°C
(320°F). Check the engine coolant
temperature and engine oil level.
If the engine is too hot, seeEngine
Overheating on page 10‑30.
The vehicle may need service, so
see your dealer.
You can monitor the oil temperature
with the gauges button on the DIC.
See Driver Information Center (DIC)
on page 5‑26.
Multiple chimes sound when
this message is displayed. This
message remains displayed and
active until the issue is resolved.
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
automatically resumes. You can
continue to drive the vehicle. If this
message continues to appear, have
the system repaired by your dealer
as soon as possible to avoid
compressor damage.
Engine Oil Messages
CHANGE ENGINE OIL
This message displays when the
life of the engine oil has expired.
See
Maintenance Schedule on
page 11‑3. After an oil change, the
engine oil life system must be reset.
See “Engine Oil Life” underDriver
Information Center (DIC) on
page 5‑26. Also, see Engine Oil on
page 10‑14 andEngine Oil Life
System on page 10‑19 for more
information.
CHECK OIL LEVEL
On some vehicles, this message
displays and two chimes sound if
the oil level in the vehicle is low.
Once the vehicle senses a change
in the engine oil level, the light
remains off.
If this message appears after
starting the engine, the engine oil
level may be too low. You may need
to add oil. See Engine Overheating
on page 10‑30.
To acknowledge the message, press
the RESET button. The message
reappears every 10 minutes until
this condition changes.
LOW OIL PRESSURE
This message displays if low oil
pressure levels occur. 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.

Black plate (41,1)Chevrolet Corvette Owner Manual - 2012
Instruments and Controls 5-41
A sound will be heard when this
message is displayed. SeeEngine
Oil on page 10‑14.
Engine Power Messages
ENGINE DRAG CONTROL
ACTIVE
This message displays when engine
drag control is active. When driving
in a lower gear in rainy, snowy,
or icy conditions and then letting up
on the accelerator or downshifting,
the rear wheels may begin to slip
and this message displays.
This message stays on for a few
seconds following the engine drag
control event.
REDUCED ENGINE POWER
If this message displays 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
dealer as soon as possible for
diagnosis and repair. See
Malfunction Indicator Lamp on
page 5‑19
for more information.
Multiple chimes sound when this
message is displayed.
To acknowledge the message, press
the RESET button. The message
reappears every five minutes until
this condition changes.
If the REDUCED ENGINE
POWER message is displayed in
combination with the COOLANT
OVER TEMPERATURE message,
see Engine Overheating on
page 10‑30.
Fuel System Messages
CHECK GAS CAP
This message displays if the fuel
cap has not been fully tightened.
Check the fuel cap to make sure
that it is on properly. Once
tightened, it takes at least one
overnight park to reset or clear this
message. If both the CHECK GAS
CAP message and the malfunction
indicator lamp in the instrument
panel cluster are on, you may need
to see your dealer for service.
See Malfunction Indicator Lamp on
page 5‑19 for more information.
LOW FUEL
This message displays when the
fuel tank is less than 10 percent
full and the display is turned off.
A sound will be heard when this
message is displayed. Refill the fuel
tank as soon as possible. See Fuel
Gauge on page 5‑12.

Black plate (49,1)Chevrolet Corvette Owner Manual - 2012
Instruments and Controls 5-49
This message is an additional
reminder to the safety belt reminder
light in the instrument panel cluster.
SeeSafety Belt Reminders on
page 5‑17 for more information.
Anti-theft Alarm System
Messages
INTRUSION SENSOR OFF
This message may display when the
anti-theft alarm has been disarmed.
INTRUSION SENSOR ON
This message may display when the
anti-theft alarm has been armed.
Service Vehicle Messages
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 dealer if you
notice a drop in heating and air
conditioning efficiency.
SERVICE ELECTRICAL
SYSTEM
This message displays if an
electrical problem has occurred
within the Powertrain Control
Module (PCM). Have the vehicle
serviced by your dealer.
SERVICE VEHICLE SOON
This message displays and a sound
will be heard when there may be an
electrical or another system problem
with the vehicle. Have your vehicle
checked by your dealer if this
message keeps appearing.
Starting the Vehicle
Messages
PRESS BRAKE TO START
ENGINE (Automatic
Transmission Only)
This message displays if you try to
start the engine by pressing the
keyless ignition start button without
having the brake pressed. The
brake needs to be pressed when
starting the engine. See
Ignition
Positions on page 9‑20 for more
information.
Tire Messages
HIGH TIRE PRESSURE
This message may be displayed
when one or more of the tires is
overinflated. This message
also displays LEFT FRONT,
RIGHT FRONT, LEFT REAR,
or RIGHT REAR to indicate
which tire is affected.

Black plate (35,1)Chevrolet Corvette Owner Manual - 2012
Driving and Operating 9-35
Brakes
Antilock Brake
System (ABS)
This vehicle has the Antilock Brake
System (ABS), an advanced
electronic braking system that helps
prevent a braking skid.
When the engine is started and the
vehicle begins to drive away, ABS
checks itself. A momentary motor or
clicking noise might be heard while
this test is going on, and it might
even be noticed that the brake
pedal moves a little. This is normal.
If there is a problem with ABS, this
warning light stays on. SeeAntilock
Brake System (ABS) Warning Light
on page 5‑22. If driving safely on a wet road and it
becomes necessary to slam on the
brakes and continue braking to
avoid a sudden obstacle, a
computer senses that the wheels
are slowing down. If one of the
wheels is about to stop rolling, the
computer will separately work the
brakes at each wheel.
ABS can change the brake pressure
to each wheel, as required, faster
than any driver could. This can help
the driver steer around the obstacle
while braking hard.
As the brakes are applied, the
computer keeps receiving updates
on wheel speed and controls
braking pressure accordingly.
Remember: ABS does not change
the time needed to get a foot up to
the brake pedal or always decrease
stopping distance. If you get too
close to the vehicle in front of you,
there will not be enough time to
apply the brakes if that vehicle
suddenly slows or stops. Always
leave enough room up ahead to
stop, even with ABS.
Using ABS
Do not pump the brakes. Just hold
the brake pedal down firmly and let
ABS work. You might hear the ABS
pump or motor operating and feel
the brake pedal pulsate, but this is
normal.
Braking in Emergencies
ABS allows the driver to steer and
brake at the same time. In many
emergencies, steering can help
more than even the very best
braking.

Black plate (1,1)Chevrolet Corvette Owner Manual - 2012
Vehicle Care 10-1
Vehicle Care
General Information
General Information . . . . . . . . . . 10-2
California Proposition65 Warning . . . . . . . . . . . . . . . . . 10-3
California Perchlorate Materials Requirements . . . . 10-3
Accessories and Modifications . . . . . . . . . . . . . . . 10-3
Lifting the Vehicle . . . . . . . . . . . . 10-4
Vehicle Checks
Doing Your Own Service Work . . . . . . . . . . . . . . . 10-7
Hood . . . . . . . . . . . . . . . . . . . . . . . . 10-7
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . 10-8
Engine Oil . . . . . . . . . . . . . . . . . . 10-14
Engine Oil Life System . . . . . 10-19
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . 10-20
Manual Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . 10-21
Hydraulic Clutch . . . . . . . . . . . . 10-21 Engine Air Cleaner/Filter . . . . 10-22
Cooling System (Engine) . . . 10-25
Cooling System
(Intercooler) . . . . . . . . . . . . . . . 10-26
Engine Coolant . . . . . . . . . . . . . 10-26
Engine Overheating . . . . . . . . 10-30
Overheated Engine
Protection
Operating Mode . . . . . . . . . . . 10-32
Power Steering Fluid . . . . . . . 10-32
Washer Fluid . . . . . . . . . . . . . . . 10-34
Brakes . . . . . . . . . . . . . . . . . . . . . 10-34
Brake Fluid . . . . . . . . . . . . . . . . . 10-38
Battery . . . . . . . . . . . . . . . . . . . . . 10-40
Rear Axle . . . . . . . . . . . . . . . . . . 10-40
Starter Switch Check . . . . . . . 10-41
Automatic Transmission Shift Lock Control
Function Check . . . . . . . . . . . 10-42
Park Brake and P (Park) Mechanism Check . . . . . . . . 10-42
Wiper Blade Replacement . . . . . . . . . . . . . . 10-43
Windshield Replacement . . . 10-43
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . 10-44
Bulb Replacement
Bulb Replacement . . . . . . . . . . 10-44
Halogen Bulbs . . . . . . . . . . . . . . 10-44
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . 10-44
Headlamps, Front Turn
Signal and Parking
Lamps . . . . . . . . . . . . . . . . . . . . 10-45
Taillamps, Turn Signal, and Stoplamps . . . . . . . . . . . . . . . . 10-46
Replacement Bulbs . . . . . . . . . 10-46
Electrical System
Electrical System Overload . . . . . . . . . . . . . . . . . . 10-46
Fuses and Circuit Breakers . . . . . . . . . . . . . . . . . . 10-47
Engine Compartment
Fuse Block . . . . . . . . . . . . . . . . 10-48
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . 10-51
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . 10-54
Winter Tires . . . . . . . . . . . . . . . . 10-55
Run-Flat Tires . . . . . . . . . . . . . . 10-56
Low-Profile Tires . . . . . . . . . . . 10-57

Black plate (32,1)Chevrolet Corvette Owner Manual - 2012
10-32 Vehicle Care
If the overheat warning is displayed
with no sign of steam:
1. Turn the air conditioning off.
2. Turn the heater on to the highesttemperature and to the highest
fan speed. Open the windows
as necessary.
3. If in a traffic jam, shift to N (Neutral) while stopped. If it is
safe to do so, pull off the road,
shift to P (Park) or N (Neutral)
and let the engine idle.
If the temperature overheat gauge
is no longer in the overheat zone or
an overheat warning no longer
displays, the vehicle can be driven.
Continue to drive the vehicle slowly
for about 10 minutes. Keep a safe
vehicle distance from the vehicle in
front. If the warning does not come
back on, continue to drive normally.
If the warning continues, pull over,
stop, and park the vehicle
right away. If there is no sign of steam, idle the
engine for three minutes while
parked. If the warning is still
displayed, turn off the engine until it
cools down. Also, see
“Overheated
Engine Protection Operating Mode”
next in this section.
Overheated Engine
Protection
Operating Mode
This emergency operating mode
lets the vehicle be driven to a
safe place, up to 80 km (50 mi),
in an emergency situation. If an
overheated engine condition exists
and the messages COOLANT
OVER TEMPERATURE and
REDUCED ENGINE POWER are
displayed, along with the check
engine light, an overheat protection
mode which alternates firing groups
of cylinders helps prevent engine
damage. In this mode, there is a
significant loss in power and engine
performance. Driving extended distances in the
overheat protection mode should be
avoided.
Notice:
After driving in the
overheated engine protection
operating mode, to avoid engine
damage, allow the engine to cool
before attempting any repair.
The engine oil will be severely
degraded. Repair the cause of
coolant loss, change the oil
and reset the oil life system.
See Engine Oil on page 10‑14.
Power Steering Fluid
SeeEngine Compartment Overview
on page 10‑8 for reservoir location.

Black plate (9,1)Chevrolet Corvette Owner Manual - 2012
Service and Maintenance 11-9
Battery
The battery supplies power to
start the engine and operate any
additional electrical accessories.
.To avoid break‐down or failure to
start the vehicle, maintain a
battery with full cranking power.
.Trained dealer technicians have
the diagnostic equipment to test
the battery and ensure that the
connections and cables are
corrosion‐free.
Belts
.Belts may need replacing if
they squeak or show signs of
cracking or splitting.
.Trained dealer technicians
can inspect the belts and
recommend replacement when
necessary. Brakes
Brakes stop the vehicle and are
crucial to safe driving.
.Signs of brake wear may include
chirping, grinding, or squealing
noises, or difficulty stopping.
.Trained dealer technicians have
access to tools and equipment
to inspect the brakes and
recommend quality parts
engineered for the vehicle.
Fluids
Proper fluid levels and approved
fluids protect the vehicle’s
systems and components.
See Recommended Fluids and
Lubricants on page 11‑12 for
GM approved fluids.
.Engine oil and windshield
washer fluid levels should be
checked at every fuel fill.
.Instrument cluster lights may
come on to indicate that fluids
may be low and need to be
filled. Hoses
Hoses transport fluids and should
be regularly inspected to ensure
that there are no cracks or leaks.
With a multi‐point inspection, your
dealer can inspect the hoses and
advise if replacement is needed.
Lamps
Properly working headlamps,
taillamps, and brake lamps are
important to see and be seen on
the road.
.Signs that the headlamps need
attention include dimming, failure
to light, cracking, or damage.
The brake lamps need to be
checked periodically to ensure
that they light when braking.
.With a multi‐point inspection,
your dealer can check the lamps
and note any concerns.