Warning Lights And Messages; Yellow Indicator Lights - Jeep Grand Cherokee 2018 Manual

NOTE:
• The gauge may take up to five seconds to
update after adding a gallon or more of Diesel
Exhaust Fluid (DEF) to the DEF tank. If you
have a fault related to the DEF system, the
gauge may not update to the new level. See
an authorized dealer for service.
• The DEF gauge may also not immediately
update after a refill if the temperature of the
DEF fluid is below 12F (-11C). The DEF line
heater will possibly warm up the DEF fluid
and allow the gauge to update after a period
of run time. Under very cold conditions, it is
possible that the gauge may not reflect the
new fill level for several drives.
WARNING LIGHTS AND
MESSAGES
The warning/indicator lights will illuminate in the
instrument panel together with a dedicated mes-
sage and/or acoustic signal when applicable.
These indications are indicative and precaution-
ary and as such must not be considered as
exhaustive and/or alternative to the information
contained in the Owner's Manual, which you are
advised to read carefully in all cases. Always
refer to the information in this chapter in the
event of a failure indication. All active telltales
will display first if applicable. The system check
menu may appear different based upon equip-
ment options and current vehicle status. Some
telltales are optional and may not appear.

Yellow Indicator Lights

— Low Diesel Exhaust Fluid (DEF)
Indicator Light — If Equipped
The Low Diesel Exhaust Fluid (DEF) Indicator
will illuminate if the vehicle is low on Diesel
Exhaust Fluid (DEF). Refer to "Starting And
Operating" for further information.
— Wait To Start Light — If Equipped
This indicator light will illuminate for approxi-
mately two seconds when the ignition is turned
to the RUN position. Its duration may be longer
based on colder operating conditions. Vehicle
will not initiate start until telltale is no longer
displayed
Refer to "Starting The Engine" in "Starting And
Operating" for further information.
NOTE:
The "Wait To Start" telltale may not illuminate if
the intake manifold temperature is warm
enough.
— Water In Fuel Indicator Light — If
Equipped
The "Water In Fuel Indicator Light" will illuminate
when there is water detected in the fuel filter. If
this light remains on, DO NOT start the vehicle
before you drain the water from the fuel filter to
prevent engine damage. Refer to the "Draining
Fuel/Water Separator Filter" section in "Dealer
Service" in "Servicing And Maintenance" for
further information.
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