Volvo XC90 Owner's Manual page 140

06 Starting and driving
Refuelling
The risk of condensation in the fuel tank is
reduced if the tank is kept well filled. When
refuelling, check that the area around the fuel
filler pipe is clean. Avoid spilling fuel onto the
paintwork. Wash off any spillage with deter-
gent and water.
IMPORTANT
The sulphur content must be a maximum of
50 ppm.
Empty tank
The design of the fuel system in a diesel engine
means that if the vehicle runs out of fuel, the
tank may need to be vented in the workshop in
order to restart the engine after fuelling.
Once the engine has stopped due to fuel star-
vation, the fuel system needs a few moments
to carry out a check. Do this before starting the
06
engine, once the fuel tank has been filled with
diesel:
1. Insert the remote control key in the ignition
switch and turn to key position II (see
page 142).
2. Wait approx. 1 minute.
3. To start the engine: Depress the brake and/
or clutch pedal, and turn the remote control
key to start position III.
140
Draining condensation from the fuel filter
The fuel filter separates condensation from the
fuel. Condensation can disrupt engine opera-
tion.
The fuel filter must be drained at the intervals
specified in the Service and Warranty Booklet
or if you suspect that the car has been filled
with contaminated fuel.
IMPORTANT
Certain special additives remove the water
separation in the fuel filter.
Diesel particle filter (DPF)
Diesel cars may be equipped with a particle fil-
ter, which results in more efficient emission
control. The particles in the exhaust gases are
collected in the filter during normal driving. So-
called "regeneration" is started in order to burn
away the particles and empty the filter. This
requires the engine to have reached normal
operating temperature.
Regeneration of the filter takes place automat-
ically at an interval of approximately
300 – 900 km depending on driving conditions.
Regeneration normally takes 10 - 20 minutes.
It may take a little longer at a low average
speed. Fuel consumption may increase slightly
during regeneration.
The rear window heating may be activated
automatically to increase the load on the
engine during regeneration without warning.
Regeneration in cold weather
If the car is frequently driven short distances in
cold weather then the engine does not reach
normal operating temperature. This means that
regeneration of the diesel particle filter does
not take place and the filter is not emptied.
When the filter has become
approximately 80% full of particles, the yellow
information symbol on the instrument panel
illuminates, and the message SOOT FILTER
FULL - SEE MANUAL
is shown on the instru-
ment panel display.
Start regeneration of the filter by driving the car
until the engine reaches normal operating tem-
perature, preferably on a main road or motor-
way. The car should then be driven for approx-
imately 20 minutes more.
NOTE
A smaller reduction of engine power may be
noticed temporarily during regeneration.
When regeneration is complete the message is
cleared automatically.