CITROEN C5 AIRCROSS Handbook page 22

Instruments
Warning/indicator lamp
Low fuel level
or
Diesel filter
Particle filter
(Diesel)
20
State Cause
Fixed (warning When it first comes on, there
lamp or LED) and remains approximately 5 litres of
needle in the red fuel in the tank (reserve).
zone (depending on
version), accompanied
by an audible signal
and a message.
The audible signal
and the message
are repeated with
increasing frequency
as the level drops
towards zero.
Fixed. The Diesel filter contains water.
Fixed, accompanied This indicates that the particle filter
by an audible signal is beginning to saturate.
and a message about
the risk of particle
filter blockage.
Fixed, accompanied by This indicates that the level in the
an audible signal and additive tank is low.
a message signalling
that the additive level
in the particle filter is
too low.
Actions/Observations
Refuel without delay to avoid running out of fuel.
Never drive until completely empty, as this could
damage the emissions control and injection systems.
Risk of damage to the injection system: carry out (2)
without delay.
As soon as the traffic conditions permit, regenerate
the filter by driving at a speed of at least 37 mph
(60 km/h) until the warning lamp goes off.
Carry out (3).