2000 CHEVROLET IMPALA check engine light

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The following information shows how to reset or
customize features after entering the main menu:
SETTINGS
- Display Current Settings
OIL LIFE
- Oil Life Reset: This feature allows you to
reset the GM Oil Life System after an oil change, see
ªEngine Oilº in the Index. Be careful not to reset the OIL
LIFE accidentally at any time other than when the oil has
been changed. It can't be reset accurately until the next oil
change. To clear the CHANGE ENGINE OIL light from
the instrument cluster and reset the oil life monitor:
1. Scroll, using the SEEK up or down arrows, until OIL
LIFE appears on the display.
2. Press the PREV or NEXT button to enter the
submenu. RESET will then be displayed.
3. Press the DISP button to reset. A chime will be heard
to verify the new setting and DONE will be
displayed for one second.
TIRE MON (Check Tire Pressure Reset): This feature
allows you to reset the tire pressure monitor after checking
all tire pressures, see ªTiresº in the Index. To clear the
LOW TIRE PRESSURE light from the instrument cluster
and reset the check tire pressure monitor:
1. Scroll, using the SEEK up or down arrows, until
TIRE MON appears on the display.2. Press the PREV or NEXT button to enter the
submenu. RESET will be displayed.
3. Press the DISP reset. A chime will be heard to
verify the new setting and DONE will be displayed
for one second.
LT DELAY (Delayed Headlamp Illumination): This
feature allows the vehicle's headlamps and parking lamps
to stay on for a fixed amount of time after exiting the
vehicle. To customize delayed headlamp illumination:
1. Scroll, using the SEEK up or down arrows, until
LT DELAY appears on the display.
2. Press the PREV or NEXT button to enter the
submenu. The current selection will have an asterisk
next to it. Scroll, using the SEEK up or down arrows,
through the following options:

OFF
- Turns feature off.

30 SEC
- 30 seconds.

60 SEC
- 60 seconds.
3. With your preference displayed, press the DISP
button to select. A chime will be heard to verify the
new setting. The new selection will be displayed
with an asterisk for one second.

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FOB PROG (Remote Keyless Entry Transmitter
Programming): This feature allows you to match the
remote keyless entry transmitter to your vehicle.
To match the transmitter:
1. Scroll, using the SEEK up or down arrows, until
FOB PROG appears on the display.
2. Press the PREV or NEXT button to enter the
submenu. The current selection will have an asterisk
next to it. BEGIN will be displayed.
3. Press the DISP button to start programming. When
the message PUSH FOB flashes, press and hold the
LOCK and UNLOCK buttons on the first transmitter
at the same time for 15 seconds. A chime will be
heard to verify the transmitter is learned.
4. Repeat Step 3 for each additional transmitter.
EXIT (Exit Feature Customization Mode): This feature
allows you to exit the vehicle customization
programming. To exit:

Scroll until EXIT appears on the display.

Press the DISP button to exit programming.
A chime will be heard to verify the exit.Passlock
Your vehicle is equipped with the Passlock
theft
-deterrent system.
Passlock is a passive theft
-deterrent system. Passlock
enables fuel if the ignition lock cylinder is turned with a
valid key. If a correct key is not used or the ignition lock
cylinder is tampered with, fuel is disabled.
During normal operation, the SECURITY message will
go off approximately five seconds after the key is turned
to the ON ignition position.
If the engine stalls and the SECURITY message flashes,
wait until the light stops flashing before trying to restart
the engine. Remember to release the key from START
as soon as the engine starts.
If the engine is running and the SECURITY message
comes on, you will be able to restart the engine if you turn
the engine off. However, your Passlock system is not
working properly and must be serviced by your dealer.
Your vehicle is not protected by Passlock at this time. You
may also want to check the fuse (see ªFuses and Circuit
Breakersº in the Index). See your dealer for service.
In an emergency, call the Chevrolet Roadside Assistance
Center at 1
-800-CHEV-USA (1-800-243-8872).
(In Canada, call 1
-800-268-6800.)

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Warning Lights, Gages and Indicators
This part describes the warning lights and gages that
may be on your vehicle. The pictures will help you
locate them.
Warning lights and gages can signal that something is
wrong before it becomes serious enough to cause an
expensive repair or replacement. Paying attention to
your warning lights and gages could also save you or
others from injury.
Warning lights come on when there may be or is a
problem with one of your vehicle's functions. As you
will see in the details on the next few pages, some
warning lights come on briefly when you start the
engine just to let you know they're working. If you are
familiar with this section, you should not be alarmed
when this happens.
Gages can indicate when there may be or is a problem
with one of your vehicle's functions. Often gages and
warning lights work together to let you know when
there's a problem with your vehicle.
When one of the warning lights comes on and stays on
when you are driving, or when one of the gages shows
there may be a problem, check the section that tells you
what to do about it. Please follow this manual's advice. Waiting to do repairs can be costly
-- and even
dangerous. So please get to know your warning lights
and gages. They're a big help.
Your vehicle may also have a driver information system
that works along with the warning lights and gages.
See ªDriver Information Systemº in the Index.
Safety Belt Reminder Light
When the key is turned to ON or START, a chime will
come on for about eight seconds to remind people to
fasten their safety belts, unless the driver's safety belt is
already buckled.
The safety belt light will
also come on and stay on
for about 20 seconds, then
it will flash for about
55 seconds.
If the driver's belt is already buckled, the light will come
on for about three seconds, but the chime will not sound.

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2-67 Malfunction Indicator Lamp
(Check Engine Light)
United States Canada
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.
NOTICE:
If you keep driving your vehicle with this light
on, after a while, 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:
Modifications made to the engine, transaxle,
exhaust 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 the CHECK ENGINE light to
come on. Modifications 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.

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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 doesn't come on, have it repaired.
This light will also come on during a malfunction in one
of two ways:

Light Flashing
-- A misfire condition has been
detected. A misfire increases vehicle emissions and
may damage the emission control system on your
vehicle. Dealer or qualified service center diagnosis
and service may be required.

Light On Steady
-- An emission control system
malfunction has been detected on your vehicle.
Dealer or qualified service center 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 possible.If the light stops flashing and remains on steady, see
ªIf the Light Is On Steadyº following.
If the light continues to flash, 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 ªIf the Light
Is On Steadyº following. If the light is still flashing,
follow the previous steps, and drive the vehicle to your
dealer or qualified service center for service.
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. See ªFilling Your Tankº in the Index. 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.

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Are you low on fuel?
As your engine starts to run out of fuel, your engine may
not run as efficiently as designed since small amounts of
air are sucked into the fuel line causing a misfire. The
system can detect this. Adding fuel should correct this
condition. Make sure to install the fuel cap properly.
See ªFilling Your Tankº in the Index. It will take a few
driving trips to turn the light off.
Have you recently changed brands of fuel?
If so, be sure to fuel your vehicle with quality fuel (see
ªFuelº in the Index). 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, misfiring, 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,
have your dealer or qualified service center check the
vehicle. Your dealer has the proper test equipment and
diagnostic tools to fix 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 in order 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, see your dealer or qualified service center to
prepare the vehicle for inspection.

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2-70 Low Oil Pressure Light
This message is displayed
when the engine oil pressure
is low. A chime will sound
continuously, also. If this
occurs, have your vehicle
serviced immediately.
CAUTION:
Don't keep driving if the oil pressure is low.
If you do, your engine can become so hot that it
catches fire. You or others could be burned.
Check your oil as soon as possible and have your
vehicle serviced.
NOTICE:
Damage to your engine from neglected oil
problems can be costly and is not covered by
your warranty.
Cruise Light (If Equipped)
The CRUISE light comes
on whenever you set your
cruise control. See ªCruise
Controlº in the Index.

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HOT COOLANT TEMP
This message is displayed
when the cooling system
temperature gets hot.
A chime will sound
continuously, also.
Check the coolant temperature gage and the coolant
level. See ªEngine Coolantº and ªEngine Coolant
Temperature Gageº in the Index. See ªEngine
Overheatingº in the Index for further information.
LOW COOLANT LEVEL
This message is displayed
when the cooling system is
low on coolant. Four chimes
will also sound.
The engine may overheat. See ªEngine Coolantº in the
Index and have your vehicle serviced as soon as you can.LOW OIL PRESSURE
This message is displayed
when the engine oil pressure
is low. A chime will sound
continuously, also. See
ªLow Oil Pressure Lightº
earlier in this section.
LOW ENG OIL LEVEL
This message is displayed
for 60 seconds at the start
of each ignition cycle when
the engine oil level is low.
Four chimes will
also sound.
See ªEngine Oilº in the Index on how to check the oil
level and for what type of oil to add.