Cadillac XT4 Owner Manual (GMNA-Localizing-Europe-16412942) - 2023 -
CRC - 5/25/22
Driving and Operating
187
exhaust cooler mixes air with the exhaust to
lower the temperature before it leaves the
tailpipe.
The DPF, the tailpipe, and other exhaust
system components must not be altered.
Regularly inspect and clean any mud or dirt
from the exhaust cooler, especially where
the exhaust cooler connects to the tailpipe
and the openings where fresh air enters the
cooler.
The DPF will clean itself as part of normal
operation. Several factors, including fuel
consumed, hours of engine operation, and
miles driven, are monitored by the Engine
Control Module (ECM). The self-cleaning
occurs approximately once per tank of fuel.
Vehicles with the DPF have specific fuel and
engine oil requirements. See
and
.
Caution
Damage can occur to the DPF
components if the required Ultra Low
Sulphur Diesel (15 ppm sulphur
maximum) fuel and engine oil specified in
the Recommended Fluids and Lubricants
(Continued)
Caution (Continued)
section of this manual are not used. This
damage would not be covered by the
vehicle warranty.
Under certain conditions, such as idling or
very short trips, the self-cleaning process has
less efficiency and cannot be completed.
To resolve this, continue driving safely at a
steady speed as close to the posted speed
limit as possible, preferably without
stopping, until the message clears. This can
take up to 30 minutes.
{
Warning
During DPF self cleaning or during
extended idling in P (Park), the exhaust
system and exhaust gases are very hot.
Things that burn could touch hot exhaust
parts under the vehicle and ignite. You or
others could be burned. Do not park,
or idle for an extended period of time,
near or over papers, leaves, dry grass,
or other things that can burn. Keep the
exhaust area clear of material that could
ignite or burn. See
“
Parking over Things
That Burn
”
in the owner's manual.
Caution
Avoid extended idling because the DPF
system is not capable of self-cleaning at
idle speed. During extended idling,
monitor the instrument cluster lights and
DIC for messages and take appropriate
action. Continued idling with the warning
light/message shown could cause damage
to the DPF, requiring repair and possible
replacement that might not be covered
by the vehicle warranty.
During self-cleaning, there will be a change
in the exhaust sound and engine idle speed.
Along with this, a burning smell and
reduction in fuel economy may be noticed.
This is normal.
If the vehicle is run at idle speed or driven
on very short trips with the DPF warning
message shown and the exhaust filter is not
cleaned as required, the malfunction
indicator lamp and a DIC message will be
shown. See your dealer. Also see
Malfunction Indicator Lamp (Check Engine
Light)
See
if
you are adding accessories or modifying the
vehicle.
