2006 CADILLAC CTS fuel

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. SeeFilling the Tank on page 5-8. 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.
Have you recently changed brands of fuel?
If so, be sure to fuel your vehicle with quality fuel. See
Gasoline Octane on page 5-5. 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, misring, 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,
your dealer can check the vehicle. Your dealer has
the proper test equipment and diagnostic tools to x
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 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.
3-43

Cruise Control Light
This light comes on
whenever you set your
cruise control.
The light will go out when the cruise control is turned
off. SeeCruise Control on page 3-13for more
information.
Highbeam On Light
This light comes on
whenever the high-beam
headlamps are on.
SeeHeadlamp High/Low-Beam Changer on page 3-10
for more information.
Fuel Gage
The fuel gage shows
approximately how much
fuel is in the fuel tank.
It works only when
the ignition is in the
ON position.
If the fuel supply gets low, the Fuel Level Low message
will appear on the Driver Information Center (DIC)
and a single chime will sound. SeeDIC Warnings and
Messages on page 3-61for more information.
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.
The gage may change when you turn, stop quickly
or accelerate quickly.
It takes a little more or less fuel to ll the tank than
the gage indicated. For example, the gage may
have indicated that the tank was half full, but
it actually took a little more or less than half the
tank’s capacity to ll the tank.
3-46

Tire Pressure Warning Message
When you see this ashing
symbol, one or more of the
vehicle’s tires is either
under or over-inated.
To acknowledge this warning, press either button on the
outboard switch on the left spoke of the steering
wheel. There are three levels of warning for this display:
1. High Tire Pressure (above 42 psi (290 kPa))
2. Low Tire Pressure (below 25 psi (170 kPa))
3. Flat Tire (below 5 psi (35 kPa))
For conditions 1 and 2, this warning will ash ve times
and the display will then show the tire pressure gage. For
condition 3, this warning will ash continuously until the
driver acknowledges it. In any of the three cases, the
warning will redisplay every 10 minutes until the situation
is corrected. Conditions 2 and 3 will also display a
warning light elsewhere on the cluster that will stay on
after this warning is acknowledged. SeeTire Pressure
Light (CTS-V Only) on page 3-41for more information.
Also seeTire Pressure Monitor System on page 5-68for
more information on tire pressure specications.
One-to-Four Shift Message
If equipped, this message
indicates that you can only
shift from FIRST (1) to
FOURTH (4) instead
of FIRST (1) to
SECOND (2).
You must complete the shift into FOURTH (4) to turn off
this feature. This helps you get the best possible fuel
economy.
After shifting to FOURTH (4), you may downshift to a
lower gear if you prefer.
Notice:Forcing the shift lever into any gear except
FOURTH (4) when the 1 TO 4 SHIFT light comes
on may damage the transmission. Shift only from
FIRST (1) to FOURTH (4) when the light comes on.
This message will come on when:
The engine coolant temperature is higher than
169°F (76°C),
you are going 15 to 19 mph (24 to 31 km/h) and
you are 21 percent throttle or less.
3-52

TUNE/SEL (Select) Knob:Turn this knob, located in
the lower right corner of the audio system, to scroll
through the menu items displayed. Press this knob to
select the menu item.
Status of Vehicle Systems
You can view the status of several vehicle systems
using the DIC.
Vehicle Information Menu
To access this menu, press the up or down arrow on
the INFO switch located to the right of the display.
The following items are available when the ignition is in
ON. These items will not be available when the
ignition is in ACCESSORY. The tire pressure menu
items are only available if your vehicle has the
Tire Pressure Monitor (TPM) system:
OUTSIDE TEMP
MI TRIP A (KM TRIP A)*
MI TRIP B (KM TRIP B)*
MILES RANGE (KM RANGE)
MPG AVG (L/100 KM AVG)*
MPG INST (L/100 KM INST)
GAL FUEL USED (L FUEL USED)*
AVG MPH (AVG KM/H)*
TIMER*
BATTERY VOLTS
ENGINE OIL LIFE*
TRANS FLUID LIFE* (Automatic Transmission Only)
PSI LF TIRE (KPA LF TIRE)
PSI RF TIRE (KPA RF TIRE)
PSI RR TIRE (KPA RR TIRE)
PSI LR TIRE (KPA LR TIRE)
BLANK LINE
*These items can be reset. Each one must be reset
individually. For a detailed description of the menu items
and how to reset them, see “Vehicle Information
Menu Item Descriptions” later in this section.
You can view any of these items at any time, but only
one item can be displayed at a time.
Vehicle Information Menu Item
Descriptions
The following paragraphs contain a more detailed
description of each menu item:
OUTSIDE TEMP:If you select this item, the current
outside temperature is displayed at the top of the
screen. It will be in either degrees Fahrenheit (°F) or
degrees Celsius (°C) depending upon whether the
system is set for English or metric units. If you wish to
change the units, seeDIC Main Menu on page 3-57.
3-54

MI TRIP A and B (KM TRIP A and B):For information
on the trip odometers, seeTrip Odometers on page 3-33.
MILES RANGE (KM RANGE):If you select this item,
the approximate number of remaining miles or
kilometers you can drive without refueling is displayed.
This estimate is based on the current driving conditions
and will change if the driving conditions change. For
example, if you are driving in traffic making frequent
stops, the display may read one number, but if you enter
the freeway, the number may change even though
you still have the same amount of gas in the gas tank.
This is because different driving conditions produce
different fuel economies. Generally, freeway driving
produces better fuel economy than city driving.
If your vehicle is low on fuel, the Fuel Level Low
message will be displayed. See “Fuel Level Low” under
DIC Warnings and Messages on page 3-61for more
information.
MPG AVG (L/100 KM AVG):If you select this item, the
approximate average miles per gallon (mpg) or liters
per 100 kilometers (L/100 km) is displayed. This number
is calculated based on the number of mpg (L/100 km)
recorded since the last time this menu item was reset.
To reset the MPG AVG (L/100 KM AVG), press the CLR
button located to the right of the screen. The display
will return to zero.MPG INST (L/100 KM INST):If you select this item,
the current fuel economy is displayed. This number
reects only the fuel economy that the vehicle has right
now and will change frequently as driving conditions
change. Unlike average fuel economy, this menu item
cannot be reset.
GAL FUEL USED (L FUEL USED):If you select this
item, the number of gallons or liters of fuel used
since the last reset of this menu item is displayed.
To reset GAL FUEL USED (L FUEL USED), press the
CLR button located to the right of the screen. The
display will return to zero.
AVG MPH (AVG KM/H):If you select this item, the
average speed of the vehicle is displayed in miles per
hour (mph) or kilometers per hour (km/h). This average
is calculated based on the various vehicle speeds
recorded since the last reset of this menu item.
To reset AVG MPH (AVG KM/H), press the CLR button
located to the right of the screen. The display will
return to zero.
TIMER:If you select this item, a timing feature is
displayed. The timer functions like a stopwatch in that
you can record the time it takes to travel from one point
to another.
To turn on the timer, press the CLR button located to
the right of the screen once. The display will read
00:00:00 TIMER ON and begin counting.
3-55

Engine Coolant Hot – Idle Engine
Notice:If you drive your vehicle while the engine is
overheating, severe engine damage may occur. If
an overheat warning appears on the instrument
panel cluster and/or DIC, stop the vehicle as soon
as possible. Do not increase the engine speed above
normal idling speed. SeeEngine Overheating on
page 5-28for more information.
This message will appear when the engine coolant
temperature is too hot. Stop and allow the vehicle to idle
until it cools down.
Engine Overheated – Stop Engine
Notice:If you drive your vehicle while the engine
is overheating, severe engine damage may occur.
If an overheat warning appears on the instrument
panel cluster and/or DIC, stop the vehicle as soon as
possible. Do not increase the engine speed above
normal idling speed. SeeEngine Overheating
on page 5-28for more information.
This message will appear when the engine has
overheated. Stop the vehicle and turn the engine off
immediately to avoid severe engine damage. See
Engine Overheating on page 5-28. A chime will also
sound when this message is displayed.
Engine Power Reduced
This message informs you that the vehicle is reducing
engine power to try to protect the engine or transmission
from damage due to extreme operating conditions.
Reduced engine power can affect the vehicle’s ability to
accelerate. If this message is on, 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 this message is on, but
acceleration and speed may be reduced. Anytime this
message stays on, the vehicle should be taken to
your GM dealer for service as soon as possible.
Fuel Level Low
When this message appears on the display, it means
that your vehicle is low on fuel. You should rell the fuel
tank as soon as possible. A single chime will sound
when this message is displayed.
Headlamps Suggested
This message will appear when the amount of available
light outside the vehicle is low and the exterior lamp
control is off. This message informs the driver that
turning on the exterior lamps is recommended even
though the daytime running lamps (DRL) are still
illuminated and it has become dark enough outside to
require the headlamps and/or other exterior lamps.
3-65

Service Charging System
This message will display when a problem with the
charging system has been detected. Have your vehicle
serviced by your GM dealer.
Service Electrical System
This message will display if an electrical problem has
occurred within the Powertrain Control Module (PCM) or
the ignition switch. Have your vehicle serviced by
your GM dealer.
Service Fuel System
The Powertrain Control Module (PCM) has detected a
problem within the fuel system when this message
appears. Have your vehicle serviced by your GM dealer.
Service Idle Control
A problem with the idle control has occurred when this
message displays. Have your vehicle serviced by
your GM dealer.
Service Stability System
If your vehicle has StabiliTrak®, this message will be
displayed if there has been a problem detected
with StabiliTrak
®.If this message comes on while you are driving, pull
off the road as soon as possible and stop carefully.
Try resetting the system by turning the ignition off and
then back on. If this message still stays on, or comes
back on again while you are driving, your vehicle needs
service. Have the StabiliTrak
®system inspected by
your GM dealer as soon as possible. SeeStabiliTrak®
System on page 4-12for more information.
Service Steering System
Your vehicle may have a speed variable assist steering
system. SeeSteering on page 4-13.
This message will be displayed if a problem is detected
with the speed variable assist steering system. When
this message is displayed, you may notice that the effort
required to steer the vehicle increases or feels heavier,
but you will still be able to steer the vehicle.
Service Theft System
This message means there is a problem with the
immobilizer. SeeImmobilizer on page 2-20for more
information. A fault has been detected in the system,
which means that the system is disabled and is not
protecting the vehicle. The vehicle usually restarts,
however, you may want to take your vehicle to your
GM dealer before turning off the engine.
3-67

Starting Disabled – Remove Key
This message will appear when the vehicle
theft-deterrent system detects that an improper ignition
key is being used to try to start the vehicle. Check
the ignition key for damage. If it is damaged, it may need
to be replaced. If it is not damaged, remove the key
and try to start the vehicle again. If it still does not start,
try another ignition key or have your vehicle serviced
by your GM dealer.
Starting Disabled – Throttle Problem
This message appears when your vehicle’s throttle
system is not functioning properly. Have your vehicle
serviced by your GM dealer.
Theft Attempted
This message is displayed if the content theft-deterrent
system has detected a break-in attempt while you
were away from your vehicle.
Top Speed – Fuel Cut Off
This message will appear when the Engine Control
Module (ECM) detects that the maximum speed for your
vehicle has been reached. Your vehicle’s top speed is
based on the top speed rating of the tires. This ensures
that your vehicle stays in a safe operating range for
the tires.
Traction Engaged
This message will appear when the traction control
system is actively limiting wheel spin. Slippery road
conditions may exist if this message is displayed, so
adjust your driving accordingly. The message will stay on
for a few seconds after the traction control system stops
limiting wheel spin. SeeTraction Control System (TCS)
(CTS) on page 4-9orTraction Control System (TCS)
(CTS-V) on page 4-10for more information.
Trans (Transmission) Hot – Idle Engine
This message indicates that the transmission uid in
your vehicle is too hot. Stop the vehicle and allow it to
idle until the transmission cools down or until this
message is removed. See alsoTransmission Fluid Hot
Message on page 3-50for more information.
Trunk Open
When this message appears on the display, it means
that the trunk lid of your vehicle was not closed
completely. You should make sure that the trunk lid is
closed completely.
Turn Signal On
If you drive your vehicle for more than about 1 mile
(1.6 km) with a turn signal on, this message will appear
as a reminder to turn off the turn signal. A multiple
chime will sound when this message is displayed.
3-69