catalytic converter CITROEN C4 CACTUS 2022 Owners Manual

14
Warning/indicator lampState Cause Action/Observations
+
+ SCR emissions
control system
(BlueHDi Diesel)
Fixed, on switching on the
ignition, associated with the
Ser vice and engine diagnostic
warning lamps, accompanied
by an audible signal and a
message. A fault with the SCR emissions
control system has been detected.
This alert disappears once the exhaust
emissions return to normal levels.
Flashing, on switching on the
ignition, associated with the
Ser vice and engine diagnostic
warning lamps, accompanied
by an audible signal and
a message indicating the
remaining driving range. Depending on the message
displayed, you can continue driving
for up to 685 miles (1,100 km) before
the engine starting prevention
system is triggered.
Carry out (3) as soon as possible to avoid a
breakdown
.
Flashing, on switching on the
ignition, associated with the
Ser vice and engine diagnostic
warning lamps, accompanied
by an audible signal and a
message. An engine immobiliser prevents
the engine from restarting (over
the authorised driving limit after
confirmation of a fault with the
emissions control system).
To start the engine, carry out (2).
Engine
diagnostic
system Flashing.
The engine management system has
a fault. There is a risk that the catalytic converter will be
destroyed.
Carry out (2) without fail
.
Fixed. The emissions control system has
a fault. The warning lamp should go off when the
engine is started.
Carry out (3) quickly.
Instruments

149
AdBlue® (BlueHDi
engines)
SCR system
Using a liquid called AdBlue® that contains
urea, a catalytic converter turns up to 85% of
the 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.
An alert system is triggered automatically once
the reser ve level is reached: you can then drive
for a further 1,500 miles (2,400 km) before the
tank is empty.
If the estimated distance travelled by your
vehicle between two ser vices is greater than
12,500 miles (20,000 km), it will be necessary
to top up the AdBlue. Once the AdBlue
® tank is empty, a system
r
equired by regulations prevents starting
of the engine.
If the SCR

system is faulty, 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 travelling the distance of
685 miles (1,100 km), a system preventing
the engine starting will be triggered
automatically.
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 the associated
alerts, refer to the corresponding section.
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.
Supply of AdBlue®
It is recommended that the AdBlue® be
topped up as soon as the first alert is
issued indicating that the reser ve level has
been reached.
In order to ensure that the SCR system
operates correctly:
-

U

se only AdBlue
® liquid that meets the
ISO 22241 standard.
-

N

ever transfer AdBlue
® to another
container: it would lose its purity.
-

N

ever dilute AdBlue
® with water.
To respect the environment and ensure
compliance with the Euro 6 standard, without
adversely affecting the per formance or fuel
consumption of its Diesel engines, CITROËN
has taken the decision to equip its vehicles
with a system that combines SCR (Selective
Catalytic Reduction) with a Diesel particle filter
(DPF) for the treatment of exhaust gases.
7
Practical information