2002 CADILLAC DEVILLE fuel

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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.
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.

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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.
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.

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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.

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Fuel Gage
Analog (United States) Analog (Canada)
DigitalThe 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 U.S.
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.
On the digital cluster, if the fuel is less than
approximately 1.2 U.S. gallons (4.7 L) the E segment
on the gage will flash. The fuel range on the Driver
Information Center (DIC) will display ªLO.º
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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Fuel Data Display (Digital Cluster)
The fuel data display
tells you all you about
the fuel economy and
how far you can travel
with the fuel remaining.
The average fuel economy (AVG) display shows the
average miles per U.S. gallon.
To reset the average fuel economy, press the INFO
button until the MPG AVG is displayed on the DIC.
Press and hold the INFO RESET button until both
the fuel data display and DIC display reads 0.0.The RANGE display shows how far the computer thinks
you can travel with the fuel that is in the tank. The
computer does not know what driving conditions will be
like for the rest of your trip, so the range is estimated
based on the recent fuel economy. Therefore, the range
reading may change as your driving habits change.
Going from city to highway driving may increase the
range reading.
The FUEL LEVEL LOW message will be displayed
in the Driver Information Center (DIC) and a chime
will sound when there is approximately 3 U.S. gallons
(11.4 L) of fuel remaining.
If the range display in the DIC shows LO, you should
stop for fuel as soon as possible. This means that you
have less than approximately 1.2 U.S. gallons (4.7 L)
of fuel remaining.
On the analog cluster, fuel data can be obtained by
pressing the INFO button. See ªDriver Information
Center (DIC)º in the Index.

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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 MILES RANGE (Analog Cluster),
MPG AVG, MPG INST, GAL FUEL USED, AVG
MPH, TIMER, BATTERY VOLTS, LF
-RF-LR-RR
TIRE (If Equipped), RPM TACHOMETER (Digital
Cluster), ENGINE OIL LIFE, TRANS FLUID LIFE,
PHONE (If Equipped), 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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MILES RANGE: (Analog Cluster Only.) 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:

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.

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CHANGE ENGINE OIL - 82: This means that the life
of the engine oil has expired and it should be changed
within 200 miles. See ªEngine Oilº and ªFilter
Recommendationsº in the Index. After an oil change,
the Oil Life Indicator must be reset. See ªOil Life
Indicator, How to Resetº in the Index.
CHANGE TRANS FLUID
- 47: This message will
appear when it is time to replace the transaxle fluid. See
ªMaintenance Scheduleº in the Index for the proper
fluid and change intervals.
CHECK BRAKE FLUID
- 37: This message will
display if the ignition is in ON to inform the driver that
the brake fluid level is low. Have the brake system
serviced by a technician as soon as possible. See ªBrake
System Warning Lightº in the Index.
CHECK COOLANT LEVEL
- 2: This message
will appear when there is a low level of engine coolant.
Have the cooling system serviced by a technician as
soon as possible.CHECK FUEL GAGE
- 50: (Analog Cluster Only)
This message will appear when the fuel supply is less
than 5 gallons (18.9 L) and the display is turned off.
A single chime will also sound when this message
is displayed.
CHECK GAS CAP
- 61: This message will appear if
the gas cap has not been fully tightened. You should
recheck your gas cap to ensure that it's on properly.
CHECK OIL LEVEL
- 36: For correct operation of
the low oil sensing system, your vehicle should be on a
level surface. A false CHECK OIL LEVEL message
may appear if the vehicle is parked on a grade. The oil
level sensing system does not check for actual oil level
if the engine has been off for a short period of time, and
the oil level is never checked while the engine is
running. If the CHECK OIL LEVEL message appears,
and your vehicle has been parked on level ground with
the engine off for at least 30 minutes, the oil level
should be checked by observing the oil dipstick. Prior to
checking the oil level, be sure the engine has been off
for a few minutes and your vehicle is on a level surface.
Then check the dipstick and add oil if necessary.
See ªEngine Oilº in the Index.