2019 Ram 1500 service indicator

After a trip:
•Check if any aftermarket equipment was installed (ad-
ditional lights, upfitter electrical accessories, audio sys-
tems, alarms) and review specifications if any (load and
Ignition Off Draw currents).
• Evaluate the latest driving cycles (distance, driving time
and parking time).
• The vehicle should have service performed if the mes-
sage is still present during consecutive trips and the
evaluation of the vehicle and driving pattern did not
help to identify the cause.
WARNING LIGHTS AND MESSAGES
The warning/indicator lights will illuminate in the instru-
ment panel together with a dedicated message and/or
acoustic signal when applicable. These indications are
indicative and precautionary and as such must not be
considered as exhaustive and/or alternative to the infor-
mation contained in the Owner ’s Manual, which you are
advised to read carefully in all cases. Always refer to the
information in this chapter in the event of a failure indica-
tion. All active telltales will display first if applicable. The system check menu may appear different based upon
equipment options and current vehicle status. Some tell-
tales are optional and may not appear.
Red Warning Lights
— Seat Belt Reminder Warning Light
This warning light indicates when the driver or passenger
seat belt is unbuckled. When the ignition is first placed in
the ON/RUN or ACC/ON/RUN position and if the
driver ’s seat belt is unbuckled, a chime will sound and the
light will turn on. When driving, if the driver or front
passenger seat belt remains unbuckled, the Seat Belt Re-
minder Light will flash or remain on continuously and a
chime will sound.
Refer to “Occupant Restraint Systems” in “Safety” for
further information.
— Air Bag Warning Light
This warning light will illuminate to indicate a fault with
the air bag, and will turn on for four to eight seconds as a
bulb check when the ignition is placed in the ON/RUN or
ACC/ON/RUN position. This light will illuminate with a
single chime when a fault with the air bag has been
detected, it will stay on until the fault is cleared. If the light
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ON/RUN position. The light should illuminate for ap-
proximately two seconds. The light should then turn off
unless the parking brake is applied or a brake fault is
detected. If the light does not illuminate, have the light
inspected by an authorized dealer.
The light also will turn on when the parking brake is
applied with the ignition switch in the ON/RUN position.
NOTE:This light shows only that the parking brake is
applied. It does not show the degree of brake application.
— Hood Open Warning Light
This warning light will illuminate when the hood is
ajar/open and not fully closed.
NOTE: If the vehicle is moving, there will also be a single
chime.
— Vehicle Security Warning Light — If Equipped
This light will flash at a fast rate for approximately 15
seconds when the vehicle security alarm is arming, and
then will flash slowly until the vehicle is disarmed.
— Engine Coolant Temperature Warning Light
This warning light warns of an overheated engine condi-
tion. If the engine coolant temperature is too high, this indicator will illuminate and a single chime will sound. If
the temperature reaches the upper limit, a continuous
chime will sound for four minutes or until the engine is
able to cool: whichever comes first.
If the light turns on while driving, safely pull over and stop
the vehicle. If the A/C system is on, turn it off. Also, shift
the transmission into NEUTRAL and idle the vehicle. If the
temperature reading does not return to normal, turn the
engine off immediately and call for service.
Refer to “If Your Engine Overheats” in “In Case Of
Emergency” for further information.
— Battery Charge Warning Light
This warning light will illuminate when the battery is not
charging properly. If it stays on while the engine is run-
ning, there may be a malfunction with the charging system.
Contact an authorized dealer as soon as possible.
This indicates a possible problem with the electrical system
or a related component.
— Oil Pressure Warning Light
This warning light will illuminate to indicate low engine
oil pressure. If the light turns on while driving, stop the
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Yellow Warning Lights
— Adaptive Cruise Control (ACC) Fault Warning
Light — If Equipped
This warning light will illuminate to indicate a fault in the
ACC system. Contact a local authorized dealer for service.
For further information, refer to “Adaptive Cruise Control
(ACC)” in “Starting And Operating.”
— Air Suspension Fault Warning Light — If
Equipped
This light will illuminate when a fault is detected with the
air suspension system.
— Engine Check/Malfunction Indicator Warning
Light (MIL)
The Engine Check/Malfunction Indicator Light (MIL) is a
part of an Onboard Diagnostic System called OBD II that
monitors engine and automatic transmission control sys-
tems. This warning light will illuminate when the ignition
is in the ON/RUN position before engine start. If the bulb
does not come on when turning the ignition switch from
OFF to ON/RUN, have the condition checked promptly.
Certain conditions, such as a loose or missing gas cap, poor
quality fuel, etc., may illuminate the light after engine start. The vehicle should be serviced if the light stays on through
several typical driving styles. In most situations, the ve-
hicle will drive normally and will not require towing.
When the engine is running, the MIL may flash to alert
serious conditions that could lead to immediate loss of
power or severe catalytic converter damage. The vehicle
should be serviced as soon as possible if this occurs.
WARNING!
A malfunctioning catalytic converter, as referenced
above, can reach higher temperatures than in normal
operating conditions. This can cause a fire if you drive
slowly or park over flammable substances such as dry
plants, wood, cardboard, etc. This could result in death
or serious injury to the driver, occupants or others.
CAUTION!
Prolonged driving with the Malfunction Indicator
Light (MIL) on could cause damage to the vehicle
control system. It also could affect fuel economy and
driveability. If the MIL is flashing, severe catalytic
converter damage and power loss will soon occur.
Immediate service is required.
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— Electronic Park Brake Warning Light
This warning light will illuminate to indicate the Electronic
Park Brake is not functioning properly and service is
required. Contact an authorized dealer.
— Electronic Stability Control (ESC) Active
Warning Light — If Equipped
This warning light will indicate when the Electronic Sta-
bility Control system is Active. The “ESC Indicator Light”
in the instrument cluster will come on when the ignition is
placed in the ON/RUN or ACC/ON/RUN position, and
when ESC is activated. It should go out with the engine
running. If the “ESC Indicator Light” comes on continu-
ously with the engine running, a malfunction has been
detected in the ESC system. If this warning light remains
on after several ignition cycles, and the vehicle has been
driven several miles (kilometers) at speeds greater than
30 mph (48 km/h), see an authorized dealer as soon as
possible to have the problem diagnosed and corrected.
• The “ESC Off Indicator Light” and the “ESC Indicator
Light” come on momentarily each time the ignition is
placed in the ON/RUN or ACC/ON/RUN position. •
The ESC system will make buzzing or clicking sounds
when it is active. This is normal; the sounds will stop
when ESC becomes inactive.
• This light will come on when the vehicle is in an ESC
event.
— Electronic Stability Control (ESC) Off Warning
Light — If Equipped
This warning light indicates the Electronic Stability Control
(ESC) is off.
Each time the ignition is turned to ON/RUN or ACC/ON/
RUN, the ESC system will be on, even if it was turned off
previously.
— LaneSense Warning Light — If Equipped
The LaneSense system provides the driver with visual and
steering torque warnings when the vehicle starts to drift
out of its lane unintentionally without the use of a turn
signal.
• When the LaneSense system senses a lane drift situation,
the LaneSense indicator changes from solid green to
solid yellow.
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•When the LaneSense system senses the lane has been
approached and is in a lane departure situation, the
LaneSense indicator changes from solid white/green to
flashing yellow.
• Refer to “LaneSense – If Equipped in “Starting And
Operating” for further information.
— Service LaneSense Warning Light — If
Equipped
This warning light will illuminate when the LaneSense
system is not operating and requires service. Please see an
authorized dealer.
— Low Washer Fluid Warning Light — If
Equipped
This warning light will illuminate when the windshield
washer fluid is low.
— Low Fuel Warning Light
When the fuel level reaches approximately 1.5 gal (5.5 L)
this light will turn on, and remain on until fuel is added.
A single warning chime will sound with Low Fuel Warn-
ing.
— Tire Pressure Monitoring System (TPMS)
Warning Light
The warning light switches on and a message is displayed
to indicate that the tire pressure is lower than the recom-
mended value and/or that slow pressure loss is occurring.
In these cases, optimal tire duration and fuel consumption
may not be guaranteed.
Should one or more tires be in the condition mentioned
above, the display will show the indications corresponding
to each tire.
CAUTION!
Do not continue driving with one or more flat tires as
handling may be compromised. Stop the vehicle,
avoiding sharp braking and steering. If a tire puncture
occurs, repair immediately using the dedicated tire
repair kit and contact an authorized dealer as soon as
possible.
Each tire, including the spare (if provided), should be
checked monthly when cold and inflated to the inflation
pressure recommended by the vehicle manufacturer on the
vehicle placard or tire inflation pressure label. (If your
vehicle has tires of a different size than the size indicated
186 GETTING TO KNOW YOUR INSTRUMENT PANEL

CAUTION!(Continued)
Monitoring System (TPMS) sensor to become inoper-
able. After using an aftermarket tire sealant it is
recommended that you take your vehicle to your au-
thorized dealer to have your sensor function checked.
— Anti-Lock Brake (ABS) Warning Light
This warning light monitors the Anti-Lock Brake System
(ABS). The light will turn on when the ignition is placed in
the ON/RUN or ACC/ON/RUN position and may stay on
for as long as four seconds.
If the ABS light remains on or turns on while driving, then
the Anti-Lock portion of the brake system is not function-
ing and service is required as soon as possible. However,
the conventional brake system will continue to operate
normally, assuming the Brake Warning Light is not also on.
If the ABS light does not turn on when the ignition is
placed in the ON/RUN or ACC/ON/RUN position, have
the brake system inspected by an authorized dealer.
— Rear Axle Locker Fault Indicator Light — If
Equipped
This warning light will illuminate to indicate when a rear
axle locker fault has been detected.
— Service Forward Collision Warning (FCW)
Light — If Equipped
This warning light will illuminate to indicate a fault in the
Forward Collision Warning System. Contact your local
authorized dealer for service.
Refer to Forward Collision Warning (FCW) inSafety for
further information.
— Service Stop/Start System Warning Light — If
Equipped
This warning light will illuminate when the Stop/Start
system is not functioning properly and service is required.
Contact an authorized dealer for service.
— Service 4WD Warning Light — If Equipped
This warning light will illuminate to signal a fault with the
4WD system. If the light stays on or comes on during
driving, it means that the 4WD system is not functioning
properly and that service is required. We recommend you
drive to the nearest service center and have the vehicle
serviced immediately.
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— Speed Control Fault Warning Light
This warning light will illuminate to indicate the Speed
Control System is not functioning properly and service is
required. Contact an authorized dealer.
Yellow Indicator Lights
— Forward Collision Warning Off Indicator Light
— If Equipped
This indicator light illuminates to indicate that Forward
Collision Warning is off.
— Air Suspension Payload Protection Indicator
Light — If Equipped
This indicator light will illuminate to indicate that the
maximum payload may have been exceeded or load level-
ing cannot be achieved at its current ride height. Protection
Mode will automatically be selected in order to “protect”
the air suspension system, air suspension adjustment is
limited due to payload.
— Trailer Merge Assist Indicator Light — If
Equipped
This indicator light will illuminate to indicate when Trailer
Merge Assist has been activated. Refer to “Blind Spot Monitoring” in “Safety” for further
information.
— TOW/HAUL Indicator Light
This indicator light will illuminate when TOW/HAUL
mode is selected.
— Cargo Light — If Equipped
This indicator light will illuminate when the cargo light is
activated by pushing the cargo light button on the head-
light switch.
/— Air Suspension Off-Road 1 Indicator Light
— If Equipped
This light will illuminate when the air suspension system is
set to the Off-Road 1 setting.
For further information, refer to “Active-Level Four Corner
Air Suspension System — If Equipped” in “Starting And
Operating.”
/— Air Suspension Off-Road 2 Indicator Light
— If Equipped
This light will illuminate when the air suspension system is
set to the Off-Road 2 setting.
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GETTING TO KNOW YOUR INSTRUMENT PANEL 189

ONBOARD DIAGNOSTIC SYSTEM — OBD II
Your vehicle is equipped with a sophisticated Onboard
Diagnostic system called OBD II. This system monitors the
performance of the emissions, engine, and transmission
control systems. When these systems are operating prop-
erly, your vehicle will provide excellent performance and
fuel economy, as well as engine emissions well within
current government regulations.
If any of these systems require service, the OBD II system
will turn on the Malfunction Indicator Light (MIL). It will
also store diagnostic codes and other information to assist
your service technician in making repairs. Although your
vehicle will usually be drivable and not need towing, see
an authorized dealer for service as soon as possible.
CAUTION!
•Prolonged driving with the MIL on could cause
further damage to the emission control system. It
could also affect fuel economy and driveability. The
vehicle must be serviced before any emissions tests
can be performed.
(Continued)
CAUTION! (Continued)
•If the MIL is flashing while the vehicle is running,
severe catalytic converter damage and power loss
will soon occur. Immediate service is required.
Onboard Diagnostic System (OBD II) Cybersecurity
Your vehicle is required to have an Onboard Diagnostic
system (OBD II) and a connection port to allow access to
information related to the performance of your emissions
controls. Authorized service technicians may need to ac-
cess this information to assist with the diagnosis and
service of your vehicle and emissions system.
WARNING!
• ONLY an authorized service technician should con-
nect equipment to the OBD II connection port in
order to read the VIN, diagnose, or service your
vehicle.
(Continued)
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