2021 CITROEN C4 CACTUS warning

146
Brake fluid level
The fluid level should be close to the
"MA X" mark. If it is not, check the
brake pad wear.
Brake fluid change
Refer to the manufacturer's service schedule
for details of the inter val for this operation.
Fluid specification
The fluid must conform to the manufacturer's
recommendations.
Coolant level
Check the coolant level regularly.
It is normal to top up the fluid
between two services.
To ensure that the reading is correct, your
vehicle must be parked on a level sur face with
the engine cool. When the engine is warm, the temperature of
the coolant is regulated by the fan.
In addition, as the cooling system is
pressurised, wait at least one hour after
switching off the engine before carrying out any
work.
To avoid the risk of scalding when you need to
top up in an emergency, place a cloth around
the cap and unscrew the cap by two turns to
allow the pressure to drop.
Once the pressure has dropped, remove the
cap and top up the coolant.
The cooling fan may star t after
switching off the engine: take care
with articles and clothing that might be
caught by the fan blades.Fluid specification
The fluid must conform to the manufacturer's
recommendations.
The coolant level should be close to the "MA X"
mark but should never exceed it.
If the level is close to or below the "MIN" mark,
it is essential to top up.
A low coolant level presents a risk of serious
damage to your engine.
Screenwash fluid level
Top up the level when necessary.
Fluid specification
The screenwash fluid must be topped up with a
ready for use mix.
In winter (temperatures below zero), a fluid with
antifreeze must be used that is appropriate for
the prevailing conditions, in order to preser ve
the elements of the system (pump, tank, ducts,
e t c .) .
Filling with pure water is prohibited under all
circumstances (risk of freezing, limestone
deposits, etc.).
Diesel additive level (Diesel
engine with particle filter)
The additive reser voir low level is
indicated by fixed illumination of this
warning lamp, accompanied by an
audible signal and a message that
the particle filter additive level is
too low.
To p p i n g u p
The reser voir must be topped up without delay
by a CITROËN dealer or a qualified workshop.
Practical information

147
AdBlue level
An alert is triggered once the reser ve level is
reached.
To avoid the vehicle being immobilised as per
regulations, you must top up with AdBlue.
For more information on AdBlue and the SCR
system, and, in particular, topping it up, refer to
the corresponding section.
Checks
Unless otherwise indicated, check these
components in accordance with the
manufacturer's service schedule and according
to your engine.
Other wise, have them checked by a CITROËN
dealer or a qualified workshop.
12 V battery
The battery does not require any
maintenance.
However, check regularly that the
terminals are correctly tightened
(versions without quick release
terminals) and that the connections
are clean.
For more information on the precautions
to take before starting work on the
12 V batter y , refer to the corresponding
section. Versions equipped with Stop & Start are
fitted with a 12 V lead-acid battery of
specific technology and specification.
Its replacement should be carried out
only by a CITROËN dealer or a qualified
workshop.
Air filter
Depending on the environment
(e.g. dusty atmosphere) and the
use of the vehicle (e.g. city driving),
replace it twice as often, if
necessary
.
Passenger compartment
filter
Depending on the environment
(e.g. dusty atmosphere) and the
use of the vehicle (e.g. city driving),
replace it twice as often, if
necessary.
A clogged passenger compartment
filter may have an adverse effect on
the per formance of the air conditioning
system and generate undesirable odours.
Oil filter
Change the oil filter each time the
engine oil is changed.
Particle filter (Diesel)
The start of saturation of the particle
filter is indicated by the constant
illumination of this warning lamp
accompanied by an alert message.
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Practical information

148
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.
If the warning lamp stays on, this indicates
a low Diesel additive level.
For more information on Checking the
levels and particularly on the level of
Diesel additive, refer to the corresponding
section.
On a new vehicle, the first particle
filter regeneration operations may be
accompanied by a "burning" smell, which
is per fectly normal.
Following prolonged operation of the
vehicle at very low speed or at idle,
you may, in exceptional circumstances,
notice the emission of water vapour at the
exhaust on acceleration. This does not
affect the behaviour of the vehicle or the
environment.
Manual gearbox
The gearbox does not require any
maintenance (no oil change).
Automatic gearbox
The gearbox does not require any
maintenance (no oil change).
Electronic gearbox
The gearbox does not require any
maintenance (no oil change).
Brake pads
Brake wear depends on the style
of driving, particularly in the case
of vehicles used in town, over short
distances. It may be necessary to
have the condition of the brakes
checked, even between vehicle
services.
Unless there is a leak in the circuit, a drop in
the brake fluid level indicates that the brake
pads are worn.
Brake disc/drum wear
For information on checking brake
disc/drum wear, contact a CITROËN
dealer or a qualified workshop.
Parking brake
If excessive travel or a loss of
effectiveness of this system is
noticed, the parking brake must
be checked, even between two
services.
This system must be checked by a CITROËN
dealer or a qualified workshop.
Only use products recommended by
CITROËN or products of equivalent quality
and specification.
In order to optimise the operation of units
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.
Practical information

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.
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Practical information

151
Important: in the event of a top-up after
a breakdown because of a lack of
AdBlue, you must wait around 5 minutes
before switching on the ignition, without
opening the driver's door, locking
the vehicle, introducing the key into
the ignition switch, or introducing
the key of the

K
eyless Entr y and
Star ting system into the passenger
compartment .
Switch on the ignition, then wait for 10
seconds before starting the engine.
Access to the AdBlue® tank
via the boot
Filling the AdBlue® tank is an operation
included in every routine ser vice on your
vehicle by a CITROËN dealer or a qualified
workshop.
Nevertheless, given the capacity of the tank, it
may be necessary to top up the fluid between
ser vices, as soon as an alert (warning lamps
and a message) indicates it.
You are recommended to go to a CITROËN
dealer or a qualified workshop.
If you intend to do the topping-up yourself,
read the following procedure carefully.
The supply in a non-drip bottle simplifies the
topping-up. F

S
witch off the ignition and remove the key.
Or
F
W
ith
K
eyless Entry and Starting, press the
" START/STOP " button to switch off the
engine.
F
F
rom the boot, lift the carpet and then,
depending on the equipment, lift out the
spare wheel and/or the storage box.
F

W
ithout pressing, turn the black cap a
quarter turn anti-clockwise and lift it off.
F

T
urn the blue cap anti-clockwise.
Access to the AdBlue® tank
via the fuel filler flap
A blue cap under the fuel filler flap indicates
access to the AdBlue® tank.
Read the following procedure carefully to
be able to top up properly.
F

S

witch off the ignition and remove the key.
Or
F

W

ith

K

eyless Entry and Starting, press the
" START/STOP " button to switch off the
engine.
F

T

ake non-drip bottles of AdBlue
®. After first
checking the use-by date, read carefully
the instructions on use on the label before
pouring the contents of the bottle into your
vehicle's AdBlue
® tank.
F
A
fter filling, per form the same operations in
reverse order.
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Practical information

153
Running out of fuel
(Diesel)
On vehicles fitted with HDi engines, the fuel
system must be primed if you run out of fuel.If the engine does not start first time, do
not keep trying, but start the procedure
again from the beginning.
BlueHDi engines
F Fill the fuel tank with at least five litres of Diesel fuel.
F

S
witch on the ignition (without starting the
engine).
F

W
ait around 6 seconds and switch off the
ignition.
F

R
epeat the operation 10 times.
F

O
perate the starter to run the engine.
Warning triangle (storage)
This safety device is used in addition to the
hazard warning lamps.
Its presence in the vehicle may be mandatory,
depending on country.
The triangle may be stowed under the boot
carpet (in the storage box) or, depending on
version, under the front passenger seat. Before leaving your vehicle to set up and
install the triangle, switch on the hazard
warning lamps and put on your high
visibility vest.
Refer to the manufacturer's instructions on
using the triangle.
Placing the triangle
on the road
F Place the triangle behind the vehicle, as
required by the legislation in force in your
c o u nt r y.
The triangle is available as an accessory;
contact a CITROËN dealer or a qualified
workshop.
Temporary puncture
repair kit
Scan the QR code on page 3 to view
explanatory videos.
Comprising a compressor and a sealant
cartridge, it allows the temporary repair of
a tyre so that you can drive to the nearest
garage.
It is designed to repair most punctures which
could affect the tyre, located on the tyre tread
or shoulder.
Only the 12 V socket at the front of
the vehicle allows the compressor to be
connected for long enough to repair or
inflate the vehicle tyre.
The other 12 V sockets of the vehicle
are not designed to be used with the
compressor.
8
In the event of a breakdown

154
Under-inflation detection
After repair of the tyre, the warning
lamp will remain on until the system is
reinitialised.
For more information on Tyre under-
inflation detection, refer to the
corresponding section.
Access to the kit
This kit is installed in the storage box, under
the boot floor.
List of tools
1. Temporary puncture repair kit.
Contains a sealant cartridge for the
temporary repair of a tyre and can also be
used for adjusting tyre pressures.
2. Socket for the security bolts (located in the
glove box or in the tool box) (depending on
ve r s i o n).
Ser ves for adapting the wheelbrace to the
special "security" bolts.
3. Removable towing eye.
For more information on Towing the vehicle
and using the removable towing eye, refer to
the corresponding section.
Composition of the kit
1. 12 V compressor, with built-in pressure
gauge.
2. Bottle of sealant, with built-in hose.
3. Speed limit sticker.
Repair procedure
F Park the vehicle without obstructing any
traffic and apply the parking brake.
F

F
ollow the safety instructions (hazard
warning lamps, warning triangle, wearing
high visibility vest, etc.) according to the
legislation in force in the country where you
are driving. The tyre inflation pressures are given on
this label.
In the event of a breakdown

159
Removing a wheel
Parking the vehicle
Park the vehicle where it does not block
traffic: the ground must be level, stable
and non-slippery.
With a manual gearbox, engage first
gear then switch off the ignition to block
the wheels.
With an automatic gearbox , place the
gear selector at position P then switch off
the ignition to block the wheels.
With an electronic gearbox , place the
gear selector at position D then switch off
the ignition to block the wheels.
Apply the parking brake and check that
the warning lamp is on in the instrument
panel.
The passengers must get out of the
vehicle and wait in safety.
Make sure that the jack is correctly
positioned at one of the vehicle's jacking
points.
Incorrect use of the jack could cause the
vehicle to drop.
Never go underneath a vehicle raised
using a jack; use an axle stand. Wheel with hub cap
When refitting the wheel
, after tightening
the wheel bolts, refit the hub cap, starting
by placing its aperture in line with the
valve and then pushing it into place all
round its edge with the palm of your hand.
List of operations
F If your vehicle has steel wheels, remove the hub cap.
F

I
f your vehicle has alloy wheels, remove the
bolt cover(s) using tool 3 .
F

I
f your vehicle has security wheel bolts, fit
security bolt socket 5 to wheelbrace 1 to
slacken the security bolt.
F

L
oosen the other bolts using wheelbrace 1
o n l y. Ensure that the jack is stable. If the
ground is slippery or loose, the jack may
slip or collapse – Risk of injury!
Ensure that the jack is positioned strictly
at one of jacking points, A or B
, under the
vehicle, making sure that the vehicle's
contact sur face is centred on the head of
the jack. Otherwise, the vehicle could be
damaged and/or the jack could collapse –
Risk of injury!
F P lace the base plate of the jack 2 on the
ground and ensure that it is directly below
the front A or rear B jacking point provided
on the chassis, whichever is closest to the
wheel to be changed.
8
In the event of a breakdown