2019 Ram 2500 warning light

546 SERVICING AND MAINTENANCE
(Continued)
NOTE:
Wheel Valve Stem must be replaced as well when installing
new tires due to wear and tear in existing tires.
Keep dismounted tires in a cool, dry place with as little expo-
sure to light as possible. Protect tires from contact with oil,
grease, and gasoline.
Replacement Tires
The tires on your new vehicle provide a balance of many
characteristics. They should be inspected regularly for wear
and correct cold tire inflation pressures. The manufacturer
strongly recommends that you use tires equivalent to the
originals in size, quality and performance when replacement
is needed. Refer to the paragraph on “Tread Wear Indica -
tors” in this section. Refer to the Tire and Loading Informa -
tion placard or the Vehicle Certification Label for the size
designation of your tire. The Load Index and Speed Symbol
for your tire will be found on the original equipment tire
sidewall.
See the Tire Sizing Chart example found in the “Tire Safety
Information” section of this manual for more information
relating to the Load Index and Speed Symbol of a tire. It is recommended to replace the two front tires or two rear
tires as a pair. Replacing just one tire can seriously affect
your vehicle’s handling. If you ever replace a wheel, make
sure that the wheel’s specifications match those of the orig
-
inal wheels.
It is recommended you contact an authorized tire dealer or
original equipment dealer with any questions you may have
on tire specifications or capability. Failure to use equivalent
replacement tires may adversely affect the safety, handling,
and ride of your vehicle.
WARNING!
• Do not use a tire, wheel size, load rating, or speed rating other than that specified for your vehicle. Some combi -
nations of unapproved tires and wheels may change
suspension dimensions and performance characteris -
tics, resulting in changes to steering, handling, and
braking of your vehicle. This can cause unpredictable
handling and stress to steering and suspension compo -
nents. You could lose control and have a collision
resulting in serious injury or death. Use only the tire
and wheel sizes with load ratings approved for your
vehicle.

TECHNICAL SPECIFICATIONS 565
BRAKE SYSTEM
If power assist is lost for any reason (for example, repeated
brake applications with the engine off), the brakes will still
function. However, you will experience a substantial
increase in braking effort to stop the vehicle.
If either the front or rear hydraulic system loses normal
braking capability, the remaining system will still function
with some loss of overall braking effectiveness. This will be
evident by increased pedal travel during application, greater
pedal force required to slow or stop, and activation of the
“Brake Warning Light” and the “ABS Warning Light” (if
equipped) during brake use.
Hydraulic Brake Assist — 2500/3500 Models Only
(Except Power Wagon)
The brake system power assist is provided by a hydro-boost
unit which shares fluid with the power steering system. You
may experience some clicking or hissing noises from the
hydro-boost system during hard braking conditions.
NOTE:
Under cold temperatures, pedal effort will be higher than
normal until the power steering fluid reaches operating
temperature.
WHEEL AND TIRE TORQUE SPECIFICATIONS
Proper lug nut/bolt torque is very important to ensure that
the wheel is properly mounted to the vehicle. Any time a
wheel has been removed and reinstalled on the vehicle, the
lug nuts/bolts should be torqued using a properly calibrated
torque wrench using a high quality six sided (hex) deep wall
socket.
Torque Specifications
**Use only your authorized dealer recommended lug nuts/
bolts and clean or remove any dirt or oil before tightening.Lug Nut/Bolt
Torque
Lug Nut/Bolt
Type**Lug Nut/
Bolt SizeLug Nut/Bolt
Socket Size
130 Ft-Lbs
(176 N·m) Cone
M14 x 1.50 22 mm
140 Ft-Lbs
(190 N·m) Flanged8

TECHNICAL SPECIFICATIONS 567
After 25 miles (40 km), check the lug nut/bolt torque to be
sure that all the lug nuts/bolts are properly seated against
the wheel.Four And Five Lug Nuts/Bolts Torque PatternFUEL REQUIREMENTS
6.4L Engine
Do not use E-85 flex fuel or ethanol blends greater than 15%
in this engine. This engines is designed to meet all emissions regu -
lations and provide satisfactory fuel economy and
performance when using high quality unleaded
gasoline having a posted octane number range of 87 to 89 as
specified by the (R+M)/2 method. The use of 89 octane
“Plus” gasoline is recommended for optimum performance
and fuel economy.
While operating on gasoline with an octane number of 87,
hearing a light knocking sound from the engine is not a cause
for concern. However, if the engine is heard making a heavy
knocking sound, see your dealer immediately. Use of gaso -
line with an octane number lower than 87 can cause engine
failure and may void or not be covered by the New Vehicle
Limited Warranty.
Poor quality gasoline can cause problems such as hard
starting, stalling, and hesitations. If you experience these
symptoms, try another brand of gasoline before considering
service for the vehicle.
WARNING!
To avoid the risk of forcing the vehicle off the jack, do
not tighten the lug nuts/bolts fully until the vehicle has
been lowered. Failure to follow this warning may result
in personal injury.8

570 TECHNICAL SPECIFICATIONS
Fuel System Cautions
NOTE:
Intentional tampering with the emissions control system can
result in civil penalties being assessed against you.
Carbon Monoxide Warnings
CAUTION!
Follow these guidelines to maintain your vehicle’s
performance:
• The use of leaded gasoline is prohibited by Federal law. Using leaded gasoline can impair engine perfor -
mance and damage the emissions control system.
• An out-of-tune engine or certain fuel or ignition malfunctions can cause the catalytic converter to over -
heat. If you notice a pungent burning odor or some
light smoke, your engine may be out of tune or
malfunctioning and may require immediate service.
Contact an authorized dealer for service assistance.

• The use of fuel additives, which are now being sold as octane enhancers, is not recommended. Most of these
products contain high concentrations of methanol. Fuel
system damage or vehicle performance problems
resulting from the use of such fuels or additives is not the
responsibility of the manufacturer and may void or not
be covered under the New Vehicle Limited Warranty.
WARNING!
Carbon monoxide (CO) in exhaust gases is deadly.
Follow the precautions below to prevent carbon
monoxide poisoning:
• Do not inhale exhaust gases. They contain carbon monoxide, a colorless and odorless gas, which can kill.
Never run the engine in a closed area, such as a garage,
and never sit in a parked vehicle with the engine
running for an extended period. If the vehicle is
stopped in an open area with the engine running for
more than a short period, adjust the ventilation system
to force fresh, outside air into the vehicle.
• Guard against carbon monoxide with proper mainte -
nance. Have the exhaust system inspected every time
the vehicle is raised. Have any abnormal conditions
repaired promptly. Until repaired, drive with all side
windows fully open.

MULTIMEDIA 607
NOTE:
Apples brakes to slow the vehicle in case of potential forward collision, or applies brakes and a warning.
Forward Collision Warning
Sensitivity — If EquippedNear
Med Far
NOTE:
Sets the distance in which a Forward Collision Warning occurs.
Front ParkSense Volume LowMedHigh
Rear ParkSense Volume LowMedHigh
Power Side Steps — If
Equipped Auto
Store
Blind Spot Alert OffLightsLights & Chime
NOTE:
Brakes the vehicle while in reverse if potential rear collision is detected.
Hill Start Assist — If
Equipped On
Off
Tire Fill Assist — If
Equipped On
Off
Setting Name
Selectable Options
9

628 MULTIMEDIA
Safety & Driving Assistance
After pressing the “Safety & Driving Assistance” button on the touchscreen, the following settings will be available:Setting Name Selectable Options
Forward Collision Warning
— If Equipped Off
Warning OnlyWarning & Active Braking
NOTE:
Applies brakes to slow the vehicle in case of potential forward collision, or applies brakes and a warning.
Forward Collision Warning
Sensitivity — If Equipped Near
MedFar
NOTE:
Sets the distance in which a Forward Collision Warning occurs.
Front ParkSense Volume LowMedHigh
Rear ParkSense Volume LowMedHigh
Blind Spot Alert OffLightsLights & Chime
Power Side Step — If
Equipped Auto
Store
Hill Start Assist — If
Equipped On
Off
Tire Fill Assist — If
Equipped On
Off

INDEX
A
Adaptive Cruise Control (ACC) (Cruise Control) ............. 357
Adding Engine Coolant (Antifreeze) ................................... 524
Adding Fuel ............................................................................. 408
Additives, Fuel ........................................................................ 568
Adjust Down....................................................................................... 44
Forward .................................................................................. 44
Rearward ................................................................................ 44
Up ............................................................................................ 44
Adjustable Pedals...................................................................... 56
Air Bag Air Bag Operation ............................................................... 249Air Bag Warning Light ....................................................... 245
Enhanced Accident Response ................................... 255, 498
Event Data Recorder (EDR) ............................................... 498
If Deployment Occurs ........................................................ 254
Knee Impact Bolsters .......................................................... 249Maintaining Your Air Bag System.................................... 256
Maintenance......................................................................... 256
Transporting Pets ................................................................ 286
Air Bag Light ........................................................... 180, 245, 287
Air Cleaner, Engine (Engine Air Cleaner Filter) ................ 509
Air Conditioner Maintenance ............................................... 511 Air Conditioner Refrigerant ..........................................511, 512
Air Conditioner System..........................................................511
Air Conditioning ................................................................. 79, 90
Air Conditioning Filter .....................................................93, 512
Air Conditioning System .........................................................91
Air Conditioning, Operating Tips ..........................................91
Air Filter ...................................................................................509
Air Pressure Tires .......................................................................................542
Alarm Panic ........................................................................................19
Security Alarm ...............................................................32, 181
Alterations/Modifications Vehicle.....................................................................................15
Android Auto ..........................................................................668
Antifreeze (Engine Coolant) ..........................................523, 571 Disposal ................................................................................525
Anti-Lock Brake System (ABS) .............................................195
Anti-Lock Warning Light.......................................................187
Apple CarPlay .........................................................................670
Assist, Hill Start .......................................................................198
Audio Systems (Radio)........................................................... 575
Auto Down Power Windows ..................................................95
Auto Unlock, Doors ................................................................306

679
Automatic Door Locks ............................................................. 39
Automatic Headlights .............................................................. 69
Automatic Tailgate Release ................................................... 102
Automatic Temperature Control (ATC) ................................ 91
Automatic Transmission ................................................ 301, 529 Adding Fluid ....................................................................... 529Fluid And Filter Change .................................................... 529
Fluid Change........................................................................ 529
Fluid Level Check ....................................................... 528, 529
Fluid Type .................................................................... 528, 574
Special Additives................................................................. 528
Automatic Transmission Limp Home Mode ...................... 306
Auxiliary Driving Systems .................................................... 208
Axle Fluid......................................................................... 529, 574
Axle Lubrication...................................................................... 529 B
Back-Up .................................................................................... 397
Back-Up Camera ..................................................................... 397
Bar, Stabilizer/Sway System ................................................. 322
Battery............................................................................... 182, 506 Charging System Light....................................................... 182
Keyless Key Fob Replacement ............................................ 21
Battery Saver Feature ............................................................... 73 Belts, Seat ................................................................................. 287
Blind Spot Monitoring............................................................ 208
Body Builders Guide ................................................................ 15 Body Mechanism Lubrication ...............................................517
B-Pillar Location ......................................................................537
Brake Assist System ................................................................197
Brake Control System .............................................................196
Brake Fluid .......................................................................527, 574
Brake System....................................................................527, 565 Fluid Check ..........................................................................527
Master Cylinder ...................................................................527Parking ..................................................................................298
Warning Light......................................................................180
Brake/Transmission Interlock ..............................................301
Bulb Replacement ...................................................................446
Bulbs, Light ......................................................................289, 446 C
Cab Top Clearance Lights ......................................................455
Camera...................................................................................... 397
Camera, Rear....................................................................397, 401
Camper .....................................................................................144
Capacities, Fluid ......................................................................571
Caps, Filler Oil (Engine) ..................................................................504, 508
Radiator (Coolant Pressure)...............................................525
Car Washes ..............................................................................558
Carbon Monoxide Warning ...........................................286, 570
Cargo Light ................................................................................72 Cellular Phone .........................................................................647
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