2004 CHEVROLET CAVALIER warning light

Up-Shift Light
If you have a manual
transaxle you have this
light. This light comes on
when you need to shift
to the next higher gear.
SeeManual Transaxle Operation on page 2-23.
Brake System Warning Light
Your vehicle’s hydraulic brake system is divided into two
parts. If one part isn’t working, the other part can still
work and stop you. For good braking, though, you need
both parts working well.
If the warning light comes on, there is a brake problem.
Have your brake system inspected right away.This light should come on briey when you turn the
ignition key to RUN. If it doesn’t come on then, have it
xed so it will be ready to warn you if there’s a
problem.
When the ignition is on, the brake system warning light
will also come on when you set your parking brake.
The light will stay on if your parking brake doesn’t
release fully. If it stays on after your parking brake is
fully released, it means you have a brake problem. United States Only
United StatesCanada
3-25

If the light comes on while you are driving, pull off the
road and stop carefully. You may notice that the pedal is
harder to push. Or, the pedal may go closer to the
oor. It may take longer to stop. If the light is still on,
have the vehicle towed for service. SeeTowing
Your Vehicle on page 4-29.
{CAUTION:
Your brake system may not be working
properly if the brake system warning light is
on. Driving with the brake system warning light
on can lead to an accident. If the light is still
on after you have pulled off the road and
stopped carefully, have the vehicle towed for
service.
Anti-Lock Brake System
Warning Light
If your vehicle is equipped
with the anti-lock brake
system, the light will come
on when your engine is
started and may stay on for
several seconds. That’s
normal.
If the light stays on, turn the ignition to OFF. Or, if the
light comes on when you’re driving, stop as soon
as possible and turn the ignition off. Then start the
engine again to reset the system. If the light still stays
on, or comes on again while you’re driving, your vehicle
needs service. If the regular brake system warning
light isn’t on, you still have brakes, but you don’t have
anti-lock brakes. If the regular brake system warning
light is also on, you don’t have anti-lock brakes
and there’s a problem with your regular brakes. See
Brake System Warning Light on page 3-25.
The anti-lock brake system warning light will come on
briey when you turn the ignition key to RUN. This
is normal. If the light doesn’t come on then, have it xed
so it will be ready to warn you if there is a problem.
3-26

Enhanced Traction System
Warning Light
If your vehicle is equipped with the Enhanced Traction
System (ETS), this warning light should come on
briey as you start the engine. If the warning light
doesn’t come on, then have it xed so it will be ready to
warn you if there’s a problem.
If the warning light stays on, or comes on when you’re
driving, there may be a problem with your Enhanced
Traction System and your vehicle may need service.
When this warning light is on, the system will not
limit wheel spin. Adjust your driving accordingly.
The Enhanced Traction System warning light may come
on for the following reasons:
If you turn the system off by moving the shift lever
to FIRST (1) or SECOND (2), the warning light will
come on and stay on. To turn the system backon, move the shift lever back to a position other
than FIRST (1) or SECOND (2). The warning light
should go off. SeeEnhanced Traction System (ETS)
on page 4-8for more information.
The warning light will come on when you set your
parking brake with the engine running, and it will
stay on if your parking brake doesn’t release fully. If
the transaxle shift lever is in any position other
than FIRST (1) or SECOND (2) and the warning
light stays on after your parking brake is fully
released, it means there’s a problem with the
system.
If the traction control system is affected by an
engine-related problem, the system will turn off and
the warning light will come on.
If the vehicle is driven on an extremely rough road,
the warning light may come on momentarily but will
go off again when the vehicle leaves the rough
surface.
If the Enhanced Traction System warning light comes
on and stays on for an extended period of time when the
transaxle shift lever is in any position other than
FIRST (1) or SECOND (2), your vehicle needs service. United States
Canada
3-27

Enhanced Traction System
Active Light
When your Enhanced Traction System is limiting wheel
spin, this light will come on. Slippery road conditions
may exist if the Enhanced Traction System active light
comes on, so adjust your driving accordingly.
This light may also come on when the anti-lock brake
system is active.
The light will stay on for a few seconds after the
Enhanced Traction System stops limiting wheel spin.
The Enhanced Traction System active light also comes
on briey when you turn the ignition key to RUN. If
the light doesn’t come on then, have it xed so it will be
there to tell you when the system is active.
Engine Coolant Temperature Gage
Your vehicle is equipped with one of these gages. With
the ignition in RUN, this gage shows the engine
coolant temperature.
If the gage pointer moves into the red area, your engine
is too hot! It means that your engine coolant has
overheated. The CHECK GAGES light should come on
if this condition exists. SeeCheck Gages Warning
Light on page 3-33for more information. If you have
been operating your vehicle under normal conditions,
you should pull off the road, stop your vehicle and turn
off the engine as soon as possible.
SeeEngine Overheating on page 5-23. United States
Canada
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3-28

Low Coolant Warning Light
This light comes on
briey when you turn
your ignition on.
If this light comes on and stays on, the coolant level in
your vehicle is low. If the light is on along with an
overheat warning, you may have a serious overheating
problem. SeeEngine Coolant Temperature Gage on
page 3-28.
Notice:If you operate the engine without coolant
or fail to maintain the cooling system properly,
you could damage the engine. The repairs would not
be covered by your warranty. Always follow the
maintenance schedule in this manual for
maintaining your cooling system. SeeCooling
System on page 5-25for more information.
SeeEngine Coolant on page 5-20for information on
what to do. Your vehicle should be serviced as soon as
possible.
Malfunction Indicator Lamp
Check Engine Light
Your vehicle is equipped with 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 be indicated 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.
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3-29

Passlock®Warning Light
This light will come on briey when you turn the key
to START.
If the light ashes, the Passlock
®system has entered a
tamper mode. If the vehicle fails to start, seePasslock®
on page 2-15.
On vehicles equipped with the remote keyless entry
system, when the ignition is off and the security system
is armed, the light will ash to indicate that the
security system is active.
If the light comes on continuously while driving and
stays on, there may be a problem with the
Passlock
®system. Your vehicle will not be protected by
Passlock®, and you should see your dealer.
Check Gages Warning Light
This light will come on briey when you are starting the
engine. If it comes on and stays on while you are
driving, check your various gages to see if they are in
the warning zones or if you are low on fuel.
SeeEngine Coolant Temperature Gage on page 3-28
andFuel Gage on page 3-34. United States
CanadaUnited StatesCanada
3-33

Service Vehicle Soon Light
This light will come on
briey when you turn on
the ignition.
It will stay on or come on if it detects a problem on the
vehicle. If this happens, see your dealer’s service
department as soon as possible.
Fuel Gage
Your fuel gage tells you about how much fuel you have
left. When the indicator nears empty, the CHECK
GAGES light will come on. You still have about
1.5 gallons (5.7 L) of fuel left, but you should get more
soon. SeeCheck Gages Warning Light on page 3-33
earlier in this section for more information.
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3-34

Avoid needless heavy braking. Some people drive in
spurts — heavy acceleration followed by heavy
braking — rather than keeping pace with traffic. This is
a mistake. Your brakes may not have time to cool
between hard stops. Your brakes will wear out much
faster if you do a lot of heavy braking. If you keep pace
with the traffic and allow realistic following distances,
you will eliminate a lot of unnecessary braking.
That means better braking and longer brake life.
If your engine ever stops while you are driving, brake
normally but do not pump your brakes. If you do,
the pedal may get harder to push down. If your engine
stops, you will still have some power brake assist.
But you will use it when you brake. Once the power
assist is used up, it may take longer to stop and
the brake pedal will be harder to push.
Anti-lock Brake System (ABS)
Your vehicle may have anti-lock brakes. ABS is an
advanced electronic braking system that will help
prevent a braking skid.
If your vehicle has anti-lock
brakes, this warning light
on the instrument panel will
come on briey when
you start your vehicle.When you start your engine, or when you begin to drive
away, your anti-lock brake system will check itself.
You may hear a momentary motor or clicking noise while
this test is going on, and you may even notice that
your brake pedal moves or pulses a little. This is normal.
Let us say the road is wet and you are driving safely.
Suddenly, an animal jumps out in front of you. You slam
on the brakes and continue braking. Here is what
happens with ABS:
4-6