Cadillac XT4 Owner's Manual page 177

176 DRIVING AND OPERATING
DEF Low
As the DEF level drops, warnings will
automatically be displayed in the
Driver Information Centre (DIC).
Select Vehicle Information in the DIC
to view DEF level status. See Driver
Information Centre (DIC) 0 120.
Refill the DEF tank at the first
opportunity after a low warning
indication to avoid vehicle speed
limitations.
It may take some time for the vehicle
to detect that DEF has been added.
If there was a vehicle speed limitation,
it will be removed gradually and it
may take several kilometres/miles for
the DIC message to update.
If DEF is added under freezing
conditions, additional time may be
required to remove speed limitations.
The DEF range DIC message first
displays at approximately 1 600 km
(1,000 mi). This message appears
again at approximately 500 km (300
mi) of remaining range before the DEF
tank becomes empty.
The DEF range DIC message first
displays at approximately 1 600 km
(1,000 mi). This message appears
again at approximately 500 km
(300 mi) of remaining range before
the exhaust fluid tank becomes empty.
As the fluid level nears empty, these
messages appear every time the
vehicle is started.
If the DEF low warnings are ignored
and the DEF tank becomes empty, the
DIC will display messages that
describe the action needed and
distance until vehicle speed is limited.
For the DEF warning light symbol, see
Diesel Exhaust Fluid (DEF) Warning
Light 0 119.
DEF Quality Poor
Use only DEF that is GM approved,
or fluid containing the API certified or
ISO 22241 label.
DEF has an expiration date. If the
system detects poor quality,
or contaminated or diluted DEF, the
DIC message will display along with
distance until vehicle speed is limited.
The speed limitation will occur in a
series of steps with the final speed
limitation being 8 km/h (5 mph) along
with a flashing warning light and
chimes.
Adding fresh DEF to the system may
resolve the problem after several
kilometres/miles of driving, depending
on several factors. If the DIC message
persists, see your retailer or additional
DIC messages may display.
Service DEF System
If a problem occurs with the DEF
system, a DIC message displays along
with distance until vehicle speed is
limited.
The speed limitation will occur in a
series of steps with the final speed
limitation being 8 km/h (5 mph) along
with a flashing warning light and
chimes.
In some cases, this message will clear
itself, indicating that the DEF system
was able to correct the condition.
If the DIC message persists, see your
retailer or additional DIC messages
may display.