2023 RAM 1500 fuel pressure

340SERVICING AND MAINTENANCE
CHECKING OIL LEVEL
To ensure proper engine lubrication, the engine oil must
be maintained at the correct level. Check the oil level at
regular intervals, such as every fuel stop. The best time to
check the engine oil level is about five minutes after a fully
warmed up engine is shut off.
Checking the oil while the vehicle is on level ground will
improve the accuracy of the oil level readings.
There are four possible dipstick types:
Crosshatched zone.
 Crosshatched zone marked SAFE.
 Crosshatched zone marked with MIN at the low end of
the range and MAX at the high end of the range.
 Crosshatched zone marked with dimples at the MIN
and the MAX ends of the range.
NOTE:Always maintain the oil level within the crosshatch
markings on the dipstick.
Adding 1 qt (1.0 L) of oil when the reading is at the low end
of the dipstick range will raise the oil level to the high end
of the range marking.
ADDING WASHER FLUID
The fluid reservoir is located under the hood and the fluid
level should be checked at regular intervals. Fill the
reservoir with windshield washer solvent only (not radiator
antifreeze). When refilling the washer fluid reservoir, take
some washer fluid and apply it to a cloth or towel and wipe
the wiper blades clean. This will help blade performance.
To prevent freeze-up of your windshield washer system in
cold weather, select a solution or mixture that meets or
exceeds the temperature range of your climate. This rating
information can be found on most washer fluid containers.
After the engine has warmed up, operate the defroster for
a few minutes to reduce the possibility of smearing or
freezing the fluid on the cold windshield. Windshield
washer solution used with water as directed on the
container, aids cleaning action, reduces the freezing point
to avoid line clogging, and is not harmful to paint or trim.
MAINTENANCE-FREE BATTERY
Your vehicle is equipped with a maintenance-free battery.
You will never have to add water, and periodic
maintenance is not required.
CAUTION!
Overfilling or underfilling the crankcase will cause oil
aeration or loss of oil pressure. This could damage
your engine.
WARNING!
Commercially available windshield washer solvents are
flammable. They could ignite and burn you. Care must
be exercised when filling or working around the washer
solution.
WARNING!
Battery fluid is a corrosive acid solution and can burn
or even blind you. Do not allow battery fluid to
contact your eyes, skin, or clothing. Do not lean over
a battery when attaching clamps. If acid splashes in
eyes or on skin, flush the area immediately with large
amounts of water
Úpage 325.
 Battery gas is flammable and explosive. Keep flame
or sparks away from the battery. Do not use a
booster battery or any other booster source with an
output greater than 12 Volts. Do not allow cable
clamps to touch each other.
 Battery posts, terminals, and related accessories
contain lead and lead compounds. Wash hands after
handling.

23_DT_OM_EN_USC_t.book Page 340

SERVICING AND MAINTENANCE349
Under normal operating conditions, the catalytic converter
will not require maintenance. However, it is important to
keep the engine properly tuned to assure proper catalyst
operation and prevent possible catalyst damage.
NOTE:Intentional tampering with emissions control systems can
result in civil penalties being assessed against you.
In unusual situations involving grossly malfunctioning
engine operation, a scorching odor may suggest severe
and abnormal catalyst overheating. If this occurs, stop the
vehicle, turn off the engine and allow it to cool. Service,
including a tune-up to manufacturer's specifications,
should be obtained immediately. To minimize the possibility of catalytic converter damage:

Do not interrupt the ignition when the transmission is
in gear and the vehicle is in motion.
 Do not try to start the vehicle by pushing or towing the
vehicle.
 Do not idle the engine with any ignition components
disconnected or removed, such as when diagnostic
testing, or for prolonged periods during very rough idle
or malfunctioning operating conditions.
COOLING SYSTEM
Engine Coolant Checks
Check the engine coolant (antifreeze) protection every
12 months (before the onset of freezing weather, where
applicable). If the engine coolant is dirty or rusty in
appearance, the system should be drained, flushed and
refilled with fresh coolant. Check the front of the A/C
condenser (if equipped) or radiator for any accumulation
of bugs, leaves, etc. If dirty, clean by gently spraying water
from a garden hose vertically down the face of the A/C
condenser (if equipped) or the back of the radiator core.
Check the engine cooling system hoses for brittle rubber,
cracking, tears, cuts and tightness of the connection at
the coolant recovery bottle and radiator. Inspect the entire
system for leaks.
DO NOT REMOVE THE COOLANT PRESSURE CAP WHEN
THE COOLING SYSTEM IS HOT.
Cooling System — Drain, Flush And Refill
NOTE:Some vehicles require special tools to add coolant
properly. Failure to fill these systems properly could
lead to severe internal engine damage. If any coolant
is needed to be added to the system please contact
an authorized dealer.
If the engine coolant (antifreeze) is dirty or contains visible
sediment, have an authorized dealer clean and flush with
OAT coolant (conforming to MS.90032).
For the proper maintenance intervals
Úpage 334.
CAUTION!
The catalytic converter requires the use of unleaded
fuel only. Leaded gasoline will destroy the effective -
ness of the catalyst as an emissions control device
and may seriously reduce engine performance and
cause serious damage to the engine.
 Damage to the catalytic converter can result if your
vehicle is not kept in proper operating condition. In
the event of engine malfunction, particularly
involving engine misfire or other apparent loss of
performance, have your vehicle serviced promptly.
Continued operation of your vehicle with a severe
malfunction could cause the converter to overheat,
resulting in possible damage to the converter and
vehicle.
WARNING!
You or others can be badly burned by hot engine
coolant (antifreeze) or steam from your radiator.
If you see or hear steam coming from under the
hood, do not open the hood until the radiator has had
time to cool. Never open a cooling system pressure
cap when the radiator or coolant bottle is hot.
 Keep hands, tools, clothing, and jewelry away from
the radiator cooling fan when the hood is raised. The
fan starts automatically and may start at any time,
whether the engine is running or not.
 When working near the radiator cooling fan, discon -
nect the fan motor lead or turn the ignition to the OFF
mode. The fan is temperature controlled and can
start at any time the ignition is in the ON mode.
8

23_DT_OM_EN_USC_t.book Page 349

SERVICING AND MAINTENANCE377
(Continued)
TIRES — GENERAL INFORMATION
Tire Pressure
Proper tire inflation pressure is essential to the safe and
satisfactory operation of your vehicle. Four primary areas
are affected by improper tire pressure:
Safety
 Fuel Economy
 Tread Wear
 Ride Comfort and Vehicle Stability
Safety Both underinflation and overinflation affect the stability of
the vehicle and can produce a feeling of sluggish response
or over responsiveness in the steering.
NOTE:

Unequal tire pressures from side to side may cause
erratic and unpredictable steering response.
 Unequal tire pressure from side to side may cause the
vehicle to drift left or right.
Fuel Economy
Underinflated tires will increase tire rolling resistance
resulting in higher fuel consumption.
Tread Wear
Improper cold tire inflation pressures can cause abnormal
wear patterns and reduced tread life, resulting in the need
for earlier tire replacement. Ride Comfort And Vehicle Stability
Proper tire inflation contributes to a comfortable ride.
Overinflation produces a jarring and uncomfortable ride.
Tire Inflation Pressures
The proper cold tire inflation pressure is listed on the
driver's side B-pillar or rear edge of the driver's side door.
At least once a month:

Check and adjust tire pressure with a good quality
pocket-type pressure gauge. Do not make a visual
judgment when determining proper inflation.
Tires may look properly inflated even when they are
underinflated.
 Inspect tires for signs of tire wear or visible damage.
Inflation pressures specified on the placard are always
“cold tire inflation pressure”. Cold tire inflation pressure is
defined as the tire pressure after the vehicle has not been
driven for at least three hours, or driven less than 1 mile
(1.6 km) after sitting for a minimum of three hours. The
cold tire inflation pressure must not exceed the maximum
inflation pressure molded into the tire sidewall.
WARNING!
Overloading of your tires is dangerous. Overloading can
cause tire failure, affect vehicle handling, and increase
your stopping distance. Use tires of the recommended
load capacity for your vehicle. Never overload them.
WARNING!
 Improperly inflated tires are dangerous and can
cause collisions.
 Underinflation increases tire flexing and can result in
overheating and tire failure.
 Overinflation reduces a tire's ability to cushion shock.
Objects on the road and chuckholes can cause
damage that result in tire failure.
Overinflated or underinflated tires can affect vehicle
handling and can fail suddenly, resulting in loss of
vehicle control.
 Unequal tire pressures can cause steering problems.
You could lose control of your vehicle.
 Unequal tire pressures from one side of the vehicle
to the other can cause the vehicle to drift to the right
or left.
 Always drive with each tire inflated to the recom -
mended cold tire inflation pressure.
WARNING!
CAUTION!
After inspecting or adjusting the tire pressure, always
reinstall the valve stem cap. This will prevent moisture
and dirt from entering the valve stem, which could
damage the valve stem.
8

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403
INDEX
AAccessory Drive Belt Inspection .................................. 346
Adaptive Cruise Control (ACC)
(Cruise Control) ................................................... 143
, 145
Adding Engine Coolant (Antifreeze) ............................ 350
Adding Fuel................................................................... 171
Additives, Fuel .............................................................. 393
Adjust Down...........................................................................32
Forward ...................................................................... 32
Rearward ....................................................................32
Up................................................................................ 32
Adjustable Pedals ...........................................................38
Advance Phone Connectivity ....................................... 235
Air Bag Air Bag Operation.................................................... 290
Air Bag Warning Light .................................... 288
, 291
Enhanced Accident Response ...................... 297, 332
Event Data Recorder (EDR).................................... 332 Front Air Bag ........................................................... 291
If Deployment Occurs ............................................. 297
Knee Impact Bolsters ............................................. 294
Maintaining Your Air Bag System .......................... 298
Maintenance ........................................................... 298
Redundant Air Bag Warning Light ......................... 289
Transporting Pets.................................................... 311
Air Bag Light ...............................................108
, 288, 311
Air Cleaner, Engine (Engine Air Cleaner Filter) ........... 342
Air Conditioner Maintenance ...................................... 344
Air Conditioner Refrigerant .......................................... 344
Air Conditioner System ................................................ 344 Air Conditioning........................................................ 54
, 56
Air Conditioning Filter ............................................59, 344
Air Conditioning System ................................................. 59
Air Conditioning, Operating Tips .................................... 59
Air Filter ............................................................... 342
, 344
Air Pressure Tires.......................................................................... 377
Air Suspension .................................................... 134
, 137
Alarm Panic........................................................................... 17
Security Alarm...................................................23
, 110
Alterations/Modifications Vehicle........................................................................ 11
Antifreeze (Engine Coolant) ............................... 350
, 395
Disposal ...................................................................351
Anti-Lock Brake System (ABS) ..................................... 262
Anti-Lock Warning Light................................................ 110
Assist, Hill Start ............................................................. 266
Audio Settings ............................................................... 224
Audio Systems (Radio) ................................................. 191
Auto Down Power Windows............................................ 70
Automatic Door Locks .................................................... 27 Automatic Headlights ..................................................... 48Automatic High Beams ................................................... 47
Automatic Tailgate Release ........................................... 75
Automatic Temperature Control (ATC) .......................... 59
Automatic Transmission ..................................... 125
, 353
Adding Fluid ............................................................. 353
Fluid And Filter Change ...........................................353
Fluid Change ............................................................353 Fluid Level Check ....................................................353 Fluid Type .......................................................353
, 397
Special Additives ..................................................... 353
Automatic Transmission Limp Home Mode ............... 128
AutoPark ....................................................................... 119
AUX Camera .................................................................. 168
Auxiliary Driving Systems ............................................. 269
Axle Fluid.............................................................. 353
, 397
Axle Locker System ...................................................... 140
Axle Lubrication ............................................................ 353
BBack-Up Camera........................................................... 163
Battery..................................................................108, 340
Charging System Light ............................................ 108
Keyless Key Fob Replacement................................. 17
Battery Saver Feature .................................................... 50
Bed Divider ..................................................................... 84 Bed Extender .................................................................. 84
Bed Step ......................................................................... 78
Bedliner......................................................................... 389
Belts, Seat..................................................................... 311
Blind Spot Monitoring .................................................. 269
Bluetooth Connecting To A Particular Mobile Phone Or Audio Device After Pairing ................................. 231
Body Builders Guide..........................................................9
Body Mechanism Lubrication ...................................... 347
Bodywork ...................................................................... 388
B-Pillar Location ........................................................... 374
Brake Assist System..................................................... 263
Brake Control System .................................................. 263
11

23_DT_OM_EN_USC_t.book Page 403

404
Brake Fluid .......................................................... 352, 397
Brake System ...................................................... 352, 392
Fluid Check.............................................................. 352
Master Cylinder ....................................................... 352
Parking .................................................................... 122
Warning Light .......................................................... 108
Brake/Transmission Interlock..................................... 125
Bulb Replacement ....................................................... 365
Bulbs, Light.......................................................... 313
, 365
CCamera ......................................................................... 163
Camera, AUX................................................................. 168
Camera, Rear ............................................................... 163
Camera, Surround View ............................................... 165
Camera, Trailer 360..................................................... 168
Capacities, Fuel............................................................ 395
Caps, Filler Oil (Engine) .............................................................. 337
Radiator (Coolant Pressure)................................... 350
Car Washes .................................................................. 388
Carbon Monoxide Warning .......................................... 313
Care And Maintenance ................................................ 388
Cargo Light ...................................................................... 49
CD.................................................................................. 226
Cellular Phone .............................................................. 252
Center High Mounted Stop Light................................. 369
Center Seat Storage Compartment ...............................60
Chart, Tire Sizing .......................................................... 371
Check Engine Light (Malfunction Indicator Light) ...... 117
Checking Your Vehicle For Safety ............................... 311
Checks, Safety.............................................................. 311
Child Restraint.............................................................. 298 Child Restraints
Booster Seats .......................................................... 301
Child Seat Installation ................................... 306
, 308
How To Stow An unused ALR Seat Belt .................305 Infant And Child Restraints ..................................... 300
Locating The LATCH Anchorages............................ 304
Lower Anchors And Tethers For Children............... 302
Older Children And Child Restraints....................... 300
Seating Positions ..................................................... 301
Clean Air Gasoline ........................................................ 393
Cleaning Wheels .....................................................................383
Climate Control ............................................................... 54 Automatic ................................................................... 54
Manual ....................................................................... 56
Compact Spare Tire ...................................................... 381
Connected Services ................ 236
, 237, 238, 239, 248
Contract, Service .......................................................... 400
Controls ......................................................................... 218
Cooling Pressure Cap (Radiator Cap) ..........................350
Cooling System ............................................................. 349 Adding Coolant (Antifreeze) ....................................350
Coolant Level ................................................. 349
, 351
Cooling Capacity ...................................................... 395
Disposal Of Used Coolant ....................................... 351 Drain, Flush, And Refill............................................349
Inspection ................................................................ 351
Points To Remember............................................... 352
Pressure Cap ...........................................................350
Radiator Cap ............................................................350Selection Of Coolant (Antifreeze) ........ 350
, 395, 396
Corrosion Protection ..................................................... 388
Cruise Control Accel/Decel.............................................................. 144 Cancel ...................................................................... 145
Resume.................................................................... 144
Cruise Control (Speed Control) ........................... 143
, 145
Cruise Light ..........................................................115, 116
Customer Assistance ................................................... 398
Cybersecurity ................................................................ 191
DDaytime Running Lights ................................................. 47 Dealer Service .............................................................. 341
Defroster, Windshield .................................... 54
, 56, 311
Deleting A Phone .......................................................... 231
Diagnostic System, Onboard ....................................... 116
Differential, Limited Slip .............................................. 140
Dimmer Control Switch .................................................. 51
Disable Vehicle Towing ................................................ 330
Disc Drive ...................................................................... 226
Disconnecting ............................................................... 231
Disposal Antifreeze (Engine Coolant) .................................... 351
Disturb........................................................................... 234
Door Ajar .............................................................. 108
, 110
Door Ajar Light ..................................................... 108, 110
Door Locks Automatic .................................................................. 27
Doors ............................................................................... 24
Driver Memory Presets ................................................ 224
Driver’s Seat Back Tilt .................................................... 30
Driving Through Flowing, Rising, Or Shallow Standing Water .................................................. 189
Driving Tips ................................................................... 189
Dual Rear Wheels......................................................... 392

23_DT_OM_EN_USC_t.book Page 404

408 N
Navigation .................................................................... 103
New Vehicle Break-In Period ....................................... 122
OOccupant Restraints .................................................... 282
Octane Rating, Gasoline (Fuel) ................................... 393
Off Road Pages ............................................................ 256 Accessory Gauges................................................... 259
Pitch And Roll .......................................................... 260
Status Bar ............................................................... 257Vehicle Dynamics.................................................... 258
Off-Pavement Driving (Off-Road) ................................. 190
Off-Road Driving (Off-Pavement) ................................. 190
Oil Filter, Change .......................................................... 342
Oil Filter, Selection ....................................................... 342
Oil Life Reset ¹ .............................................................. 101
Oil Pressure Light ......................................................... 109
Oil, Engine............................................................ 341
, 396
Capacity ................................................................... 395
Dipstick.................................................................... 340
Disposal................................................................... 342
Filter......................................................................... 342
Filter Disposal ......................................................... 342 Identification Logo .................................................. 341Materials Added To................................................. 342Pressure Warning Light .......................................... 109Recommendation .......................................... 341
, 395
Synthetic.................................................................. 342
Viscosity................................................................... 395
Onboard Diagnostic System ........................................ 116
Operating Precautions ................................................. 116 Operator Manual
Owner's Manual ....................................................... 401
Outside Rearview Mirrors............................................... 40
Overheating, Engine ..................................................... 327
PPaddle Shifters ............................................................. 129
Paint Care...................................................................... 388
Pair (Link) Uconnect Phone To A Mobile Phone

b
...230
Panic Alarm ..................................................................... 17
Parallel Parking ............................................................. 159
Parking Brake ............................................................... 122
Parking Lights ................................................................. 48
ParkSense Front And Rear......................................................... 152
ParkSense Active Park Assist ...................................... 157
ParkSense System, Rear.............................................. 152
Passive Entry................................................................... 25 Pedals, Adjustable .......................................................... 38
Pedestrian Warning System ......................................... 276
Pets ................................................................................ 311
Phone Mode .................................................................. 228
Pickup Box................................................................ 79
, 81
Pinch Protection.............................................................. 73
Placard, Tire And Loading Information ........................ 374
Power Distribution Center (Fuses)........................... 355
, 360
Door Locks ................................................................. 25
Mirrors ........................................................................ 41
Outlet (Auxiliary Electrical Outlet) ...................... 66
, 67
Seats .......................................................................... 32
Side Steps .................................................................. 25
Sliding Rear Window ................................................. 71
Steering ....................................................................141 Sunroof ...................................................................... 72
Windows .................................................................... 70
Power Seats Down .......................................................................... 32
Forward ...................................................................... 32
Rearward ................................................................... 32
Recline ....................................................................... 32
Tilt .............................................................................. 32
Up ............................................................................... 32
Power Steering ............................................................. 141
Pregnant Women And Seat Belts ................................ 287
Presets .......................................................................... 224
Pressure Washing ........................................................ 341
Pretensioners Seat Belts ................................................................ 287
Profile Settings ............................................................. 193
RRadial Ply Tires ............................................................. 378
Radiator Cap (Coolant Pressure Cap) ................349, 350
Radio Off Road Pages ....................................................... 256Presets ..................................................................... 224Settings.................................................................... 191
Sound Setting .......................................................... 211
Radio Controls .............................................................. 218
Radio Mode .................................................................. 218
Radio Operation ..................................................218
, 252
Radio Remote Controls ................................................ 218
Rain Sensitive Wiper System......................................... 53 RamBox........................................................................... 81
RamBox Safety ............................................................... 83Rear Axle (Differential) ................................................. 353
Rear Cargo Area Utility Rails .......................................... 80

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