engine JEEP WRANGLER 4XE JL 2021 User Guide

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Never have any smoking materials lit in or
near the vehicle when the fuel door is open or
the tank is being filled.
Never add fuel when the engine is running.
This is in violation of most state and federal
fire regulations and may cause the Malfunc-
tion Indicator Light to turn on.
A fire may result if fuel is pumped into a
portable container that is inside of a vehicle.
You could be burned. Always place fuel
containers on the ground while filling.
CAUTION!
Damage to the fuel system or emission control
system could result from using an improper
fuel filler cap. A poorly fitting cap could let
impurities into the fuel system. Also, a poorly
fitting aftermarket cap can cause the Malfunc -
tion Indicator Light (MILyfWRLOOXPLQDWHGXHWR
fuel vapors escaping from the system.
To avoid fuel spillage and overfilling, do not
“top off” the fuel tank after filling.

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When in “Partial Off” mode, the TCS function-
ality of ESC, except for the limited slip feature
described in the TCS section, has been
disabled and the ESC OFF Indicator Light will
be illuminated. When in “Partial Off” mode,
the engine power reduction feature of TCS is
disabled, and the enhanced vehicle stability
offered by the ESC system is reduced.
Trailer Sway Control (TSCyfLVGLVDEOHGZKHQ
the ESC system is in the “Partial Off” mode.

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In the ESC “Full Off” mode, the engine torque
reduction and stability features are disabled.
Therefore, enhanced vehicle stability offered
by the ESC system is unavailable. In an emer-
gency evasive maneuver, the ESC system will
not engage to assist in maintaining stability.
ESC “Full Off” mode is intended for
off-highway or off-road use only.
The Electronic Stability Control (ESCyfFDQQRW
prevent the natural laws of physics from
acting on the vehicle, nor can it increase the
traction afforded by prevailing road condi -
tions. ESC cannot prevent all accidents,
including those resulting from excessive
speed in turns, driving on very slippery
surfaces, or hydroplaning. ESC also cannot
prevent collisions.
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Do not run the engine in a closed garage or in
confined areas any longer than needed to
move your vehicle in or out of the area.
If you are required to drive with the trunk/lift-
gate/rear doors open, make sure that all
windows are closed and the climate control
BLOWER switch is set at high speed. DO NOT
use the recirculation mode.
If it is necessary to sit in a parked vehicle with
the engine running, adjust your heating or
cooling controls to force outside air into the
vehicle. Set the blower at high speed.

WARNING!
Carbon monoxide (COyfLQH[KDXVWJDVHVLV
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
maintenance. 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.
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Always park on a firm, level surface as far from
the edge of the roadway as possible before
raising the vehicle.
Turn on the Hazard Warning Flashers.
Apply the parking brake firmly and shift an
automatic transmission in PARK; a manual
transmission to REVERSE.
Block the wheel diagonally opposite the wheel
to be raised.
Never start or run the engine with the vehicle
on a jack.
Do not let anyone sit in the vehicle when it is
on a jack.
Do not get under the vehicle when it is on a
jack. If you need to get under a raised vehicle,
take it to a service center where it can be
raised on a lift.
Only use the jack in the positions indicated
and for lifting this vehicle during a tire change.
WARNING!
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Racing the engine or spinning the wheels may
lead to transmission overheating and failure.
Allow the engine to idle with the transmission
in NEUTRAL for at least one minute after every
five rocking-motion cycles. This will minimize
overheating and reduce the risk of clutch or
transmission failure during prolonged efforts
to free a stuck vehicle.
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Do not drain the fuel/water separator filter
when the engine is running.
Diesel fuel will damage blacktop paving
surfaces. Drain the filter into an appropriate
container.
1 — Retainers
2 — Fuel Filter Protective Cover
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Exhaust gases can injure or kill. They contain
Carbon Monoxide (COyfZKLFKLVFRORUOHVVDQG
odorless. Breathing it can make you unconscious
and can eventually poison you
Ú
page 346.

A hot exhaust system can start a fire if you park
over materials that can burn. Such materials
might be grass or leaves coming into contact
with your exhaust system. Do not park or operate
your vehicle in areas where your exhaust system
can contact anything that can burn.

CAUTION!
The catalytic converter requires the use of
unleaded fuel only. Leaded gasoline will
destroy the effectiveness 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 opera -
tion of your vehicle with a severe malfunction
could cause the converter to overheat,
resulting in possible damage to the converter
and vehicle.

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You or others can be badly burned by hot
engine coolant (antifreezeyfRUVWHDPIURP\RXU
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 radi-
ator 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,
disconnect the fan motor lead or turn the igni -
tion to the OFF mode. The fan is temperature
controlled and can start at any time the igni -
tion is in the ON mode.
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