2008 DODGE RAM 2500 GAS check engine light

SENTRY KEYT
The Sentry KeytImmobilizer System prevents unautho-
rized vehicle operation by disabling the engine. The
system does not need to be armed or activated. Operation
is automatic, regardless of whether the vehicle is locked
or unlocked.
The system uses ignition keys that have an embedded
electronic chip (transponder) to prevent unauthorized
vehicle operation. Therefore, only keys that are pro-
grammed to the vehicle can be used to start and operate
the vehicle. The system will shut the engine off in two
seconds if someone uses an invalid key to try to start the
engine.
NOTE:A key that has not been programmed is also
considered an invalid key, even if it is cut to fit the
ignition switch lock cylinder for that vehicle.
During normal operation, after turning on the ignition
switch, the Vehicle Security Light will turn on for threeseconds for a bulb check. If the light remains on after the
bulb check, it indicates that there is a problem with the
electronics. In addition, if the light begins to flash after
the bulb check, it indicates that someone used an invalid
key to try to start the engine. Either of these conditions
will result in the engine being shut off after two seconds.
If the Vehicle Security Light turns on during normal
vehicle operation (vehicle running for longer than 10
seconds), it indicates that there is a fault in the electron-
ics. Should this occur, have the vehicle serviced as soon
as possible.
NOTE:
²The Sentry KeytImmobilizer System is not compat-
ible with some aftermarket remote starting systems.
Use of these systems may result in vehicle starting
problems and loss of security protection.
THINGS TO KNOW BEFORE STARTING YOUR VEHICLE 15
2

NOTE:If the SECURITY light stays on continuously
during vehicle operation, have the system checked by an
authorized dealer.
To Disarm the System:
Use the RKE transmitter to UNLOCK the door. If some-
thing has triggered the system in your absence, the horn
will sound three times when you unlock the doors and
the SECURITY light will flash for 30 seconds. Check the
vehicle for tampering.
The Security Alarm System will also disarm if the vehicle
is started with a programmed Sentry Keyt. If an unpro-
grammed Sentry Keytis used to start a vehicle, the
engine will run for two seconds and then the Security
Alarm will be initiated. To exit the alarming mode, press
the RKE UNLOCK button, or start the vehicle with a
programmed Sentry Keyt.
The Security Alarm System is designed to protect your
vehicle; however, you can create conditions where thesystem will arm unexpectedly. If you remain in the vehicle
and lock the doors with the RKE transmitter, the alarm will
sound when you pull the door handle to exit. The door will
be locked, but the Security Alarm System will not arm.
ILLUMINATED ENTRY SYSTEM Ð IF EQUIPPED
The courtesy lights will turn on when you use the Remote
Keyless Entry (RKE) Transmitter or open the doors. This
feature is only available if you have Remote Keyless Entry.
The lights will fade to off after about 30 seconds, or they
will immediately fade to off once the ignition switch is
turned ON.
NOTE:
²The front courtesy overhead console and door cour-
tesy lights do not turn off if the dimmer control is in
the interior lights ON position (extreme top position).
²The illuminated entry system will not operate if the
dimmer control is in the extreme downward position.
20 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

²The light remains on or flickers after the six to eight-
second interval.
²The light flickers or comes on and remains on while
driving.
NOTE:If the speedometer, tachometer or any engine-
related gauges are not working, the airbag control mod-
ule may also be disabled. The airbags may not be ready
to inflate for your protection. Promptly check fuse block
for blown fuses. Refer to the label located on the inside of
the fuse block cover for the proper airbag fuses. See your
authorized dealer if the fuse is good.
Event Data Recorder (EDR)
In the event of an accident, your vehicle is designed to
record up to five seconds of specific vehicle data param-
eters (see the following list) in an event data recorder prior
to the moment of airbag deployment and up to a quarter-
second of high-speed deceleration data during and/orafter airbag deployment. EDR data are ONLY recorded if
an airbag deploys and are otherwise unavailable.
NOTE:Under certain circumstances, EDR data may not
be recorded (e.g., loss of battery power).
In conjunction with other data gathered during a com-
plete accident investigation, the electronic data may be
used by DaimlerChrysler Corporation and others to learn
more about the possible causes of crashes and associated
injuries in order to assess and improve vehicle perfor-
mance. In addition to crash investigations initiated by
DaimlerChrysler Corporation, such investigations may
be requested by customers, insurance carriers, govern-
ment officials, and professional crash researchers, such as
those associated with universities, and with hospital and
insurance organizations.
In the event that an investigation is undertaken by
DaimlerChrysler Corporation (regardless of initiative),
the company or its designated representative will first
60 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE

INSTRUMENT CLUSTER DESCRIPTION
1. Check Gauges ± Premium Cluster Only
This light illuminates when the Voltmeter, Engine
Oil Pressure or Engine Coolant Temperature
gauges indicate a reading either too high or too low.
Examine the gauges carefully, and follow the instructions
contained below for each indicated problem.
NOTE:When the ignition switch is turned to OFF, the
Fuel Gauge, Voltmeter, Oil Pressure and Engine Coolant
Temperature gauges may not show accurate readings.
When the engine is not running, turn the ignition switch
to ON to obtain accurate readings.
2. Voltmeter
When the engine is running, the gauge indicates
the electrical system voltage. The pointer should
stay within the normal range if the battery is charged. Ifthe pointer moves to either extreme left or right and
remains there during normal driving, the electrical sys-
tem should be serviced.
NOTE:If the gauge pointer moves to either extreme of
the gauge, the ªCheck Gaugesº indicator will illuminate
and a single chime will sound. The ªCheck Gaugesº
indicator may also illuminate prior to the voltage gauge
moving out of normal range. In either case, see you local
authorized Dealer for system service.
3. Turn Signal Indicators
Lights in instrument cluster flash when outside turn
signals are operating.
4. Tachometer
The Tachometer indicates engine speed in revolutions per
minute.
196 UNDERSTANDING YOUR INSTRUMENT PANEL

CAUTION!
Do not operate the engine with the tachometer
pointer at high rpm for extended periods. Engine
damage may occur.
5. Airbag Indicator Light
The indicator lights and remains lit for six to eight
seconds when the ignition is first turned ON. If the light
stays on, flickers or comes on while driving, have the
airbag system checked by an authorized dealer.
6. High Beam Indicator
This indicator shows that headlights are on high
beam.
7. Seat Belt Reminder Light
When the ignition switch is first turned ON, this
light will turn on for five to eight seconds as a bulbcheck. During the bulb check, if the driver's seat belt is
unbuckled, a chime will sound. After the bulb check or
when driving, if the driver's seat belt remains unbuckled,
the Seat Belt Warning Light will flash or remain on
continuously. Refer to9Enhanced Driver Seat Belt Re-
minder System (BeltAlertt)9in the Occupant Restraints
section for more information.(See page 46 for more
information.)
8. Speedometer
The Speedometer shows the vehicle speed in miles per
hour and/or kilometers per hour (mph/kph).
9. Oil Pressure Gauge Ð Premium Cluster Only
The pointer should always indicate some oil pres-
sure when the engine is running. A continuous
high or low reading, under normal driving conditions,
may indicate a lubrication system malfunction. Immedi-
ate service should be obtained from an authorized dealer.
UNDERSTANDING YOUR INSTRUMENT PANEL 197
4

NOTE:If the gauge pointer moves to either extreme of
the gauge, the ªCheck Gaugesº indicator will illuminate
and a single chime will sound.
10. Transfer Case Position
This display indicator shows the transfer case position
selection.
For additional information refer to ª4-Wheel Drive Op-
erationº in section 5 of this manual.
11. TOW HAUL
The TOW HAUL button is located at the end of the gear
shift lever. This light will illuminate when the TOW
HAUL OD/OFF button is pushed once.
12. OD/OFF
The OD/OFF button is located at the end of the gear shift
lever. This light will illuminate when the TOW HAUL
OD/OFF button is pushed twice.13. Temperature Gauge
The Temperature Gauge indicates engine coolant
temperature. Any reading within the normal
range indicates that the cooling system is operat-
ing satisfactorily. The gauge needle will likely indicate a
higher temperature when driving in hot weather, up
mountain grades, in heavy traffic, or when towing a
trailer. If the needle rises to the ª245É F (118É C)º mark,
stop the vehicle, shift into NEUTRAL, and increase the
engine idle speed for two to three minutes. If the tem-
perature reading does not return to normal, shut your
engine OFF and allow it to cool. Seek authorized service
immediately. Refer to ªCooling Systemº under ªMain-
taining Your Vehicleº in section 7.
198 UNDERSTANDING YOUR INSTRUMENT PANEL

CAUTION!
Do not leave your vehicle unattended with the en-
gine running as you would not be able to react to the
temperature indicator if the engine overheats.
NOTE:Engine idle speed will automatically increase to
1000 rpm at elevated coolant temperatures to improve
engine cooling.
NOTE:If the gauge pointer moves to either extreme of
the gauge, the ªCheck Gaugesº indicator will illuminate
and a single chime will sound.
14. Security Light
This light will flash rapidly for approximately 15 seconds
when the Vehicle Security Alarm is arming. The light will
flash at a slower speed continuously after the alarm is set.
The Security light will also come on for about three
seconds when the ignition is first turned on.15. Transmission Range Indicator (Automatic
Transmissions Only)
When the gear selector lever is moved, this indicator
shows the automatic transmission gear range selected.
16. Odometer/Trip Odometer
The odometer shows the total distance the vehicle has
been driven. U.S. federal regulations require that upon
transfer of vehicle ownership, the seller certify to the
purchaser the correct mileage that the vehicle has been
driven. Therefore, if the odometer reading is changed
during repair or replacement, be sure to keep a record of
the reading before and after the service so that the correct
mileage can be determined.
The two trip odometers show individual trip mileage. To
switch from odometer to trip odometers, press and
release the Trip Odometer button.
UNDERSTANDING YOUR INSTRUMENT PANEL 199
4

release the Trip Odometer button on the instrument
cluster. To reset the oil change indicator system (after
performing the scheduled maintenance) refer to the fol-
lowing procedure.
1. Turn the ignition switch to the ON position(Do not
start the engine).
2. Fully depress the accelerator pedal slowly three
times within 10 seconds.
3. Turn the ignition switch to the OFF/LOCK position.
NOTE:If the indicator message illuminates when you
start the vehicle, the oil change indicator system did not
reset. If necessary repeat this procedure.
17. Front Fog Light Indicator Ð If Equipped
This light shows when the front fog lights are ON.18. Malfunction Indicator Light
This light is part of an onboard diagnostic system
which monitors the emissions and engine control
system. If the vehicle is ready for emissions
testing, the light will come on when the ignition is first
turned on and remain on, as a bulb check, until the
engine is started. If the vehicle is not ready for emissions
testing the light will come on when the ignition is first
turned on and remain on for 15 seconds, then blink for 5
seconds, and remain on until the vehicle is started. If the
bulb does not come on during starting, have the condi-
tion investigated promptly.
If this light comes on and remains on while driving, it
suggests a potential engine control problem and the need
for system service.
Although your vehicle will usually be drivable and not
need towing, see your authorized dealer for service as
soon as possible.
UNDERSTANDING YOUR INSTRUMENT PANEL 201
4