Adblue; Scr System; Freezing Of The Adblue - CITROEN C4 Spacetourer Handbook

Practical information
Only use products recommended by
CITROËN or products of equivalent quality
and specification.
In order to optimise the operation of
components as important as those in the
braking system, CITROËN selects and
offers very specific products.
After washing the vehicle, dampness, or
in wintry conditions, ice can form on the
brake discs and pads: braking efficiency
may be reduced. Make light brake
applications to dry and defrost the brakes.
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AdBlue

(BlueHDi engines)
To respect the environment and ensure
compliance with the Euro 6 standard, without
adversely affecting the performance or fuel
consumption of Diesel engines, CITROËN
has taken the decision to equip its vehicles
with a system that associates SCR (Selective
Catalytic Reduction) with a Diesel particle filter
(DPF) for the treatment of exhaust gases.
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SCR system

Using a fluid called AdBlue ® that contains
urea, a catalytic converter turns up to 85%
of nitrogen oxides (NOx) into nitrogen and
water, which are harmless to health and the
environment.
The AdBlue ® is contained in
a special tank holding about
17 litres.
Its capacity allows a driving range of around
12,500 miles (20,000 km). An alert system is
triggered automatically once the reserve level
is reached: you can then drive for a further
1,500 miles (2,400 km) before the tank is
empty.
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Once the AdBlue tank is empty, a system
required by regulations prevents starting
of the engine.
If the SCR system is defective, the level of
emissions from your vehicle will no longer
meet the Euro 6 standard: your vehicle
becomes polluting.
In the event of a confirmed fault with the
SCR system, you must go to a CITROËN
dealer or a qualified workshop as soon
as possible: after a running distance of
685 miles (1,100 km), a system will be
triggered automatically to prevent engine
starting.
In either case, a range indicator gives you
the distance you can travel before the
vehicle is immobilised.
For more information on the Warning and
indicator lamps and associated alerts,
refer to the corresponding section.
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Freezing of the AdBlue

AdBlue ® freezes at temperatures below
around -11°C.
The SCR system includes a heater for the
AdBlue ® tank, allowing you to continue
driving in very cold conditions.