Extreme Cold Weather (Below -22°F Or −30°C); After Starting; Starting The Engine - Diesel Engine (If Equipped); Automatic Transmission - Jeep WRANGLER 2023 Owner's Manual

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EXTREME COLD WEATHER (BELOW
–22°F OR −30°C)
To ensure reliable starting at these temperatures, use
of an externally powered electric engine block heater
(available from an authorized dealer) is recommended.

AFTER STARTING

The idle speed is controlled automatically and will
decrease as the engine warms up.
STARTING THE ENGINE — DIESEL ENGINE
(IF EQUIPPED)
Before starting your vehicle, adjust your seat, both
inside and outside mirrors, and fasten your seat belts.
The starter is allowed to crank for up to 25-second
intervals. Waiting two minutes between such intervals
will protect the starter from overheating.
WARNING!
Before exiting a vehicle, always come to a com-
plete stop, then shift the automatic transmission
into PARK and apply the parking brake.
Always make sure the ignition is in the OFF posi-
tion, key fob is removed from the vehicle and
vehicle is locked.
Never leave children alone in a vehicle, or with
access to an unlocked vehicle. Leaving children in
a vehicle unattended is dangerous for a number of
reasons. A child or others could be seriously or
fatally injured. Children should be warned not to
touch the parking brake, brake pedal or the gear
selector.
Do not leave the key fob in or near the vehicle, or
in a location accessible to children, and do not
leave the ignition of a vehicle equipped with Key-
less Enter 'n Go™ in the ACC or ON/RUN position.
A child could operate power windows, other con-
trols, or move the vehicle.
Do not leave children or animals inside parked
vehicles in hot weather. Interior heat buildup may
cause serious injury or death.
NOTE:
Engine start up in very low ambient temperature could
result in evident white smoke. This condition will disap-
pear as the engine warms up.
The engine is allowed to crank as long as 25 sec-
onds. If the engine fails to start during this period,
please wait at least two minutes for the starter to
cool before repeating start procedure.
If the Water in Fuel Indicator Light remains on, DO
NOT START engine before you drain the water from
the fuel filters to avoid engine damage
page 308.
(Continued)
WARNING!
CAUTION!
STARTING AND OPERATING

AUTOMATIC TRANSMISSION

Start the engine with the transmission gear selector in
the PARK (P) position. Apply the brake before shifting to
any driving range.

EXTREME COLD WEATHER

The cartridge block heater clips into the engine block
near the water jacket and transfers heat to the coolant.
It requires a 110–115 Volt AC electrical outlet with a
grounded, three-wire extension cord. Its use is recom-
mended for environments that routinely fall below
-10°F (-23°C). It should be used when the vehicle has
not been running overnight or longer periods and
should be plugged in for two hours prior to start. Its use
is required for cold starts with temperatures under
-20°F (-28°C).
NOTE:
The engine block heater and heater cord are factory-
installed options. If your vehicle is not equipped, heater
and heater cords are available from an authorized
Mopar® dealer.
A 12 Volt heater built into the fuel filter housing aids
in preventing fuel gelling. It is controlled by a built-in
thermostat.
A Diesel Pre-Heat system both improves engine
starting and reduces the amount of white smoke
generated by a warming engine.
125
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