2002 CADILLAC SEVILLE fuel

2-75 Tachometer
This gage indicates the
engine speed in revolutions
per minute (rpm).
NOTICE:
Do not operate the engine with the tachometer in
the shaded area or engine damage may occur.
Engine Speed Limiter
This feature prevents the engine from operating at too
many revolutions per minute (rpm). When the engine's
rpm are critically high, the fuel supply to the engine is
shut off. When the engine speed slows, the fuel supply
will come on again. This helps prevent damage to
the engine.
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.

2-81 Engine Coolant Temperature Gage
United States Canada
This gage shows the engine coolant temperature.
If the gage pointer moves into the shaded area,
the engine is too hot.
That reading means the same thing as the warning
light
-- the engine coolant has overheated.
See ªEngine Overheatingº in the Index.
Malfunction Indicator Lamp
(Service Engine Soon Light in the United
States or Check Engine Light in Canada)
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.

2-82
The SERVICE ENGINE SOON or 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, 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 the SERVICE ENGINE
SOON or 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.
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.

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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.

2-84
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 SERVICE
ENGINE SOON or 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.

2-87 Fuel Gage
United States Canada
The fuel gage shows approximately how much fuel is in
the tank. It works only when the ignition is in ON.If the fuel supply gets down to approximately
three gallons (11.4 L) of fuel remaining in the tank,
the FUEL LEVEL LOW message will appear on
the Driver Information Center (DIC) and a single
chime will sound.
Here are a few concerns some owners have had about
the fuel gage. All of these situations are normal and do
not indicate that anything is wrong with the fuel gage:

At the gas station the gas pump shuts off before the
gage reads full.

GAL FUEL USED on the DIC does not correspond
exactly to the amount of fuel remaining as shown on
the fuel gage.

The gage may change when you turn, stop quickly
or accelerate quickly.

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Driver Information Center (DIC)
This display gives you the status of many of your
vehicle's systems. The DIC is also used to display driver
personalization features and warning/status messages.
All messages will appear in the DIC display, located at
the bottom of the instrument panel cluster.
DIC Controls and Displays
The Driver Information Center (DIC) buttons are
located to the right of the steering wheel on the
instrument panel, near the air outlets.INFO (Information): Pressing this button up or down
will display the OUTSIDE TEMP, MILES RANGE,
MPG AVG, MPG INST, GAL FUEL USED, AVG
MPH, TIMER, BATTERY VOLTS, LF
-RF-LR-RR
TIRE (If Equipped), ENGINE OIL LIFE, TRANS
FLUID LIFE, PHONE (Option) and FEATURE
PROGRAMMING and Blank Display.
INFO (Information) RESET: Pressing this button will
reset the MPG AVG, GAL FUEL USED, AVG MPH,
TIMER, ENGINE OIL LIFE and TRANS FLUID
LIFE. For more information about the trip odometer,
see ªOdometerº in the Index.

MPG AVG (Average Miles per Gallon): This
message shows the approximate fuel economy you
have averaged since the last time you reset the value.
To reset the MPG AVG (Average Fuel Economy),
press the INFO button to display the MPG AVG
then press and hold the INFO RESET button until
0.0 MPG AVG is displayed.

GAL (Gallons) FUEL USED: This message shows
how much fuel has been used since the last reset.
To learn how much fuel is used from a new starting
point, press the RESET button while the GAL FUEL
USED is displayed in the DIC.

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OUTSIDE TEMP (Temperature): This message
shows the outside temperature. After this display has
been on the DIC for about five seconds, the words
OUTSIDE TEMP will disappear so that only the
temperature remains.
MILES RANGE: This message shows about how
many miles you can drive without refilling your fuel
tank. Once the range drops below 40 miles (64 km)
remaining, the display will show LOW.
MPG INST (Instantaneous Miles per Gallon):
This message shows the instantaneous fuel economy
which varies with your driving conditions, such as
acceleration, braking and the grade of the road being
traveled. The INFO RESET button does not function
in this mode.
BATTERY VOLTS: This message shows the current
battery voltage. If the voltage is normal the display will
show BATTERY VOLTS OK. If the voltage drops
below 10.5 volts, the display will show BATTERY
VOLTS LOW. If the voltage is above 16 volts, the
display will show BATTERY VOLTS HIGH. If the
display shows the high or low message, you will need
to have your battery checked. See ªDriver Information
Center (DIC) Messagesº later in this section for
more information.LF-RF-LR-RR TIRE (If Equipped):On vehicles
equipped with the tire pressure monitor, this message
shows the tire pressure for each tire (left front, right
front, left rear and right rear). Pressing the INFO button
will scroll through the tire pressure for each of the four
tires, such as the following:

34 PSI LF TIRE OK or

234 kPa LF TIRE OK
If a tire pressure is below 25 PSI (172 kPa) or above
38 PSI (265 kPa), the message will appear as shown
above except it will show TIRE LOW or TIRE HIGH as
appropriate. If desired, the tire pressure information can
be programmed not to appear when using the INFO
button to scroll through the DIC displays. See ªVehicle
Programming and Personalization Featuresº in the Index.
If a low or high tire pressure is detected by the system
while driving, a CHECK TIRE PRESSURE message
will appear in the display. If this occurs, press the INFO
button to scroll to the tire(s) with a low or high pressure
condition. See ªDriver Information Center (DIC)
Messagesº later in this section for more information.
ENG/MET (English/Metric): Press this button to
display information in the English (miles) or metric
(kilometers) system.