Diesel Exhaust Fluid (Def) Fault Warning Messages - Jeep Grand Cherokee 2018 Manual

• Engine Will Not Restart in XXXX mi Refill
DEF — This message will display when DEF
driving range is less than 311 miles. It is also
displayed at 249 miles, 186 miles, and
124 miles. Continuous Display starts at
124 miles. DEF fluid top off is required with in
the displayed mileage. The message will be
displayed during vehicle start up with an
updated distance mileage, and it will be ac-
companied by a single chime. Starting at
100 miles, remaining range will be continu-
ously displayed while operating the vehicle.
Chimes will also accompany the 75, 50 and
25 mile remaining distances. The DEF Low
telltale will be on continuously until DEF fluid
is topped off.
• Engine Will Not Restart Refill DEF — This
message will display when the DEF driving
range is less than 1 mile, DEF fluid top off is
required or the engine will not restart. The
message will be displayed during vehicle
start up, and it will be accompanied by a
single chime. The DEF Low telltale will be
illuminated continuously until DEF fluid tank
is filled with a minimum of two gallons of DEF.
Diesel Exhaust Fluid (DEF) Fault
Warning Messages
There are different messages which are dis-
played if the vehicle detects that the DEF sys-
tem has been filled with a fluid other than DEF,
has experienced component failures, or when
tampering has been detected.
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When the DEF system needs to be serviced the
following warnings will display:
• Service DEF System See Dealer — This
message will display when the fault is initially
detected and each time the vehicle is started.
The message will be accompanied by a
single chime and the Malfunction Indicator
Light. See an authorized dealer to have the
vehicle serviced immediately. If not corrected
in 30 miles, vehicle will enter the "Engine Will
not restart in XXXmi Service DEF See dealer"
warning stage and message.
• Incorrect DEF Detected See Dealer — This
message will display if the DEF system has
detected the incorrect fluid has been intro-
duced to the DEF tank. The message will be
accompanied by a single chime. See an
authorized dealer to have the vehicle ser-
viced immediately. If not corrected in
30 miles, vehicle will enter the "Engine Will
Not Restart in XXX mi Service DEF See
Dealer" warning stage and message.
• Engine Will Not Restart in XXX mi Service
DEF See Dealer — This message is first
displayed if the fault detected is not serviced
after 30 miles of operation. It is also displayed
at 250 miles 186 miles and 124 miles. System
service is required within the displayed mile-
age. The message will appear in the display
during vehicle start up with an updated dis-
tance mileage, and it will be accompanied by
a single chime. Starting at 124 miles, remain-
ing range will be continuously displayed while
operating the vehicle. Chimes will also ac-
company the 75, 50 and 25 mile remaining
distances. See an authorized dealer to have
the vehicle serviced immediately.
• Engine Will Not Restart Service DEF Sys-
tem See Dealer — This message will display
if DEF system issue detected is not serviced
during the allowed period. Your engine will
not restart unless your vehicle is serviced by
your authorized dealer. This message will be
displayed when under 1 mile until engine will
not start and each time the vehicle is started,
and will be continuously displayed. The mes-
sage will be accompanied by a single chime.
Your Malfunction Indicator Light will be con-
tinuously illumined. See an authorized dealer
if the message appears while engine is
running.
• Engine Will Not Start Service DEF System
See Dealer — This message will display when
the fault detected is not serviced after the "En-
gine Will Not Restart Service DEF System See
Dealer" message is displayed on the next sub-
sequent restart. Your engine will not start unless
your vehicle is serviced by your authorized
dealer. The message will be accompanied by a
single chime. Your Malfunction Indicator Light
will be continuously illuminated. If the message
appears and you can not start the engine, see an
authorized dealer to have the vehicle serviced
immediately.