2022 RAM 1500 coolant temperature

148STARTING AND OPERATING
STOPPING THE ENGINE
After full load operation, idle the engine for a few minutes before shutting it down. This idle period will allow the lubricating oil and coolant to carry excess heat
away from the turbocharger. Refer to the following chart for proper engine shutdown.
NOTE:Under certain conditions the engine Stop/Start functionality may be temporarily disabled and the engine fan will run after the engine is turned off to protect the
engine. These conditions are under high load and high temperature conditions.
Driving Condition Load Turbocharger Temperature Idle Time (min.)
Before Engine Shutdown
Stop and Go EmptyCoolNone
Stop and Go Medium 0.5
Highway Speeds MediumWarm 1.0
City Traffic Maximum GCWR 1.5
Highway Speeds Maximum GCWR 2.0
Uphill Grade Maximum GCWR Hot2.5

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STARTING AND OPERATING149
Do Not Operate The Engine With Low Oil
Pressure
If the Low Oil Pressure Warning Light turns on while
driving, stop the vehicle and shut down the engine
as soon as possible. After the vehicle is safely
stopped, restart the engine and monitor the lamp.
If the lamp is still illuminated, shut the engine off,
contact an authorized dealer, and do not operate
the vehicle until the cause is corrected. If the lamp
is no longer illuminated, the engine can be
operated, but should be taken to an authorized
dealer as soon as possible for further inspection.
NOTE:Do not operate the vehicle until the cause is
corrected. This light does not show how much oil is
in the engine. The engine oil level must be checked
under the hood.
Do Not Operate The Engine With Failed
Parts
All engine failures give some warning before the
parts fail. Some important observations are:
Engine misfiring or vibrating severely
Sudden loss of power
Unusual engine noises
Fuel, oil or coolant leaks
Sudden change, outside the normal operating
range, in the engine operating temperature
Excessive smoke
Oil pressure drop
ENGINE BLOCK HEATER — IF EQUIPPED

Engine Block Heater Cord Location
The engine block heater warms engine coolant and
permits quicker starts in cold weather. Connect the
heater cord to a ground-fault interrupter protected
110–115 Volt AC electrical outlet with a grounded,
three-wire extension cord.
For diesel engines, its use is recommended for
environments that routinely fall below -10°F
(-23°C). It should be used when the vehicle has not
been running for long periods of time and should
be plugged in two hours prior to start. Its use is
required for cold starts with temperatures under
-20°F (-28°C).
To ensure reliable starting at these temperatures,
use of an externally powered electric engine block
heater (available from an authorized dealer) is
recommended.
The engine block heater cord is routed under the
hood on the passenger side of the vehicle next to
the engine coolant reservoir.
CAUTION!
If oil pressure falls to less than normal readings,
shut the engine off immediately. Failure to do so
could result in immediate and severe engine
damage.WARNING!
Remember to disconnect the engine block
heater cord before driving. Damage to the
110-115 Volt electrical cord could cause
electrocution.
4

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150STARTING AND OPERATING
ENGINE BREAK-IN RECOMMENDATIONS —
GASOLINE ENGINE
A long break-in period is not required for the engine
and drivetrain (transmission and axle) in your
vehicle.
Drive moderately during the first 300 miles
(500 km). After the initial 60 miles (100 km),
speeds up to 50 or 55 mph (80 or 90 km/h) are
desirable.
While cruising, brief full-throttle acceleration within
the limits of local traffic laws contributes to a good
break-in. Wide-open throttle acceleration in low
gear can be detrimental and should be avoided.
The engine oil installed in the engine at the factory
is a high-quality energy conserving type lubricant.
Oil changes should be consistent with anticipated
climate conditions under which vehicle operations
will occur. For the recommended viscosity and
quality grades Ú page 473.
NOTE:A new engine may consume some oil during its first
few thousand miles (kilometers) of operation. This
should be considered a normal part of the break-in
and not interpreted as a problem. Please check
your oil level with the engine oil indicator often
during the break-in period. Add oil as required.
ENGINE BREAK-IN RECOMMENDATIONS —
DIESEL ENGINE
The diesel engine does not require a break-in
period due to its construction. Normal operation is
allowed, providing the following recommendations
are followed:
Warm up the engine before placing it under
load.
Do not operate the engine at idle for prolonged
periods.
Observe vehicle oil pressure and temperature
indicators.
Check the coolant and oil levels frequently.
Vary throttle position at highway speeds when
carrying or towing significant weight.
NOTE:Light duty operation such as light trailer towing or
no load operation will extend the time before the
engine is at full efficiency. Reduced fuel economy
and power may be seen at this time. The engine oil installed in the engine at the factory
is a high-quality energy conserving type lubricant.
Oil changes should be consistent with anticipated
climate conditions under which vehicle operations
will occur. For the recommended viscosity and
quality grades Ú
page 473.
NOTE:NON-DETERGENT OR STRAIGHT MINERAL OILS
MUST NEVER BE USED.
PARKING BRAKE
ELECTRIC PARK BRAKE (EPB)
Your vehicle is equipped with an EPB that offers
simple operation, and some additional features
that make the parking brake more convenient and
useful.
The parking brake is primarily intended to prevent
the vehicle from rolling while parked. Before
leaving the vehicle, make sure that the parking
brake is applied. Also, be certain to leave the
transmission in PARK.
You can engage the parking brake in two ways:
Manually, by applying the parking brake switch.
Automatically, by enabling the Auto Park Brake
feature in the Customer Programmable
Features section of the Uconnect settings.
CAUTION!
Never use Non-Detergent Oil or Straight Mineral
Oil in the engine or damage may result.

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304MULTIMEDIA
The following describes each feature and its
operation:
TIMERS
When the Timers page is selected, you will be able
to view the Drag and Accel & Braking timers.
Recent
A real-time summary of performance timers for
the most recent valid run, or the status of a test
in progress.
Last
The last recorded run of performance timers.
Best
The best recorded run of performance timers,
except for braking data.
Save
Pressing the SAVE button will let you save the timer
data for Recent, Last, and Best recorded times to
an inserted USB flash drive.
The Timers pages contain the timers listed below:
Reaction Time: Measures the driver's reaction
time for launching the vehicle against a simu -
lated drag strip timing light (behavior modeled
after 500 Sportsman Tree) displayed in the
instrument cluster display.
NOTE:Drag timers (RT, 60 ft [20 m], 330 ft [100 m],
1/8 mile [200 m], 1000 ft [300 m], and 1/4 mile
[400 m]) and Acceleration Timers (0-60 mph
[0-96 km/h] and 0-100 mph [0-160 km/h]) will be
ready to acquire new recent data measurements
when the vehicle is at 0 mph (0 km/h) and vehicle
is in drive.
The timer listed below shows the measured time
required to travel at the cited distance is met.
Some timers will also display speeds present at the
time the distance was met.
0-60 mph (0-100 km/h)
0-100 mph (0-160 km/h)
60 ft (20 m) ET
330 ft (100 m) ET
⅛ Mile (200 m) + ET
⅛ Mile (200) + mph
1000 ft (300 m) ET
¼ Mile (400 m) + ET
¼ Mile (400 m) + mph
Brake Distance ft (meters)
NOTE:The distance measurement will be aborted if the
brake pedal is released or the parking brake is
engaged, before the vehicle comes to a complete
stop.
Brake from mph (km/h)
NOTE:Brake Distance and Speed timers only display
“ready” when vehicle is traveling at a speed
greater than 30 mph (48 km/h).
GAUGES
When selected, this screen displays the following
values:
Coolant Temperature
Shows the actual coolant temperature.
Oil Temperature
Shows the actual oil temperature.
Oil Pressure
Shows the actual oil pressure.
Trans Temp
Shows actual transmission oil temperature.

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MULTIMEDIA309
ACCESSORY GAUGE
The Accessory Gauge page displays the current
status of the vehicle’s Coolant Temperature, Oil
Temperature, Oil Pressure, Transmission
Temperature, and Battery Voltage.

Accessory Gauge Menu 2WD/4WD

1 — Oil Temperature
2 — Coolant Temperature
3 — Oil Pressure
4 — Battery Voltage
5 — Transmission Temperature
5

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388IN CASE OF EMERGENCY
NOTE:There are steps that you can take to slow down an
impending overheat condition:
If your Air Conditioner (A/C) is on, turn it off. The
A/C system adds heat to the engine cooling
system and turning the A/C off can help remove
this heat.
You can also turn the temperature control to
maximum heat, the mode control to floor and
the blower control to high. This allows the heater
core to act as a supplement to the radiator and
aids in removing heat from the engine cooling
system.
MANUAL PARK RELEASE
In order to move the vehicle in cases where the
transmission will not shift out of PARK (P) (such as
a depleted battery), a Manual Park Release is
available.
Follow these steps to activate the Manual Park
Release:

1. Apply firm pressure to the brake pedal while
seated in the driver’s seat.

2. Apply the parking brake if possible.
3. Using a small screwdriver or similar tool, open the Manual Park Release cover, which is
located to the lower left of the steering column.

Manual Park Release Access Cover

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 try to open a cooling
system pressure cap when the radiator or
coolant bottle is hot.
CAUTION!
Driving with a hot cooling system could damage
your vehicle. If the temperature gauge reads
HOT (H), pull over and stop the vehicle. Idle the
vehicle with the air conditioner turned off until
the pointer drops back into the normal range. If
the pointer remains on HOT (H), and you hear
continuous chimes, turn the engine off
immediately and call for service.
WARNING!
Always secure your vehicle by fully applying the
parking brake before activating the Manual Park
Release. In addition, you should be seated in the
driver’s seat with your foot firmly on the brake
pedal when activating the Manual Park Release.
Activating the Manual Park Release will allow
your vehicle to roll away if it is not secured by the
parking brake, or by proper connection to a tow
vehicle. Activating the Manual Park Release on
an unsecured vehicle could lead to serious
injury or death for those in or around the vehicle.

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393
SERVICING AND MAINTENANCE
SCHEDULED SERVICING — GASOLINE
ENGINE
Your vehicle is equipped with an automatic oil
change indicator system. The oil change indicator
system will remind you that it is time to take your
vehicle in for scheduled maintenance.
Based on engine operation conditions, the oil
change indicator message will illuminate. This
means that service is required for your vehicle.
Operating conditions such as frequent short-trips,
trailer tow, and extremely hot or cold ambient
temperatures will influence when the “Oil Change
Required” message is displayed. Have your vehicle
serviced as soon as possible, within the next
500 miles (805 km).An authorized dealer will reset the oil change
indicator message after completing the scheduled
oil change. If a scheduled oil change is performed
by someone other than an authorized dealer, the
message can be reset by referring to the steps
described under Instrument Cluster Display
Ú
page 114.
NOTE:Under no circumstances should oil change
intervals exceed 10,000 miles (16,000 km),
12 months or 350 hours of engine run time,
whichever comes first. The 350 hours of engine
run or idle time is generally only a concern for fleet
customers. Once A Month Or Before A Long Trip:
Check engine oil level.
Check windshield washer fluid level.
Check tire pressure and look for unusual wear
or damage. Rotate tires at the first sign of irreg
-
ular wear, even if it occurs before the oil indi -
cator system turns on.
Check the fluid levels of the coolant reservoir,
brake master cylinder, and fill as needed.
Check function of all interior and exterior lights.
8

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398SERVICING AND MAINTENANCE
SCHEDULED SERVICING — DIESEL ENGINE
Your vehicle is equipped with an automatic oil
change indicator system. The oil change indicator
system will remind you that it is time to take your
vehicle in for scheduled maintenance.
Based on engine operation conditions, the oil
change indicator message will illuminate. This
means that service is required for your vehicle.
Operating conditions such as frequent short-trips,
trailer tow, extremely hot or cold ambient
temperatures will influence when the “Oil Change
Required” message is displayed. Have your vehicle
serviced as soon as possible, within the next
500 miles (805 km). An authorized dealer will reset the oil change
indicator message after completing the scheduled
oil change. If a scheduled oil change is performed
by someone other than an authorized dealer, the
message can be reset by referring to the steps
described under Instrument Cluster Display
Ú
page 114.
NOTE:Under no circumstances should oil change
intervals exceed 10,000 miles (16,000 km) or
12 months, whichever comes first. Once A Month Or Before A Long Trip:
Check engine oil level.
Check windshield washer fluid level.
Check the tire inflation pressures and look for
unusual wear or damage.
Check the fluid levels of the coolant reservoir,
brake master cylinder, and power steering, and
fill as needed.
Check function of all interior and exterior lights.

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