engine CITROEN C4 CACTUS 2023 User Guide
Page 14 of 196
12
Instruments
Warning 
lamps litAction Remaining 
driving 
range
 
 
A top-up is 
essential, 
due to the 
risk that the 
engine will 
be prevented 
from starting.Between 
62 miles 
and 0 miles 
(100 km and 
0 km)
 
 
To be able 
to restart 
the engine, 
add at least 
5 litres of 
AdBlue
® to 
its tank. 0 miles (km)
Malfunction of the SCR emissions 
control system
Malfunction detection
 
 
If a malfunction is detected, 
these warning lamps come on, 
accompanied by an audible 
signal and an "Emissions fault” 
message.
The alert is triggered while driving, when the 
fault is detected for the first time, and thereafter 
the lighting of the service warning lamp and an 
audible signalK
If the low oil level is confirmed by a check using 
the dipstick, the level must be topped up to avoid 
damage to the engine.
For more information on  Checking 
levels, refer to the corresponding 
section.
Oil level indicator fault 
 
This is indicated by the display of a message in 
the instrument panel.
Contact a CITROËN dealer or a qualified 
workshop.
In the event of a fault with the electric indicator, 
the oil level is no longer monitored.
If the system is faulty, you must check the engine 
oil level using the manual dipstick located under 
the bonnet.
For more information on  Checking 
levels, refer to the corresponding 
section.
AdBlue® range indicators 
(BlueHDi)
The Diesel BlueHDi engines are equipped with 
a system that associates the SCR (Selective 
Catalytic Reduction) emissions control system 
and the Diesel particle filter (DPF) for the 
treatment of exhaust gases. They cannot 
function  without AdBlue
®fluid.
When the level of AdBlue® falls below the 
reserve level (between 1,500 miles and 0 miles 
(2,400 and 0
 
km)), a warning lamp lights up 
when the ignition is switched on and an estimate 
of the distance that can be travelled before 
engine starting is prevented is displayed in the 
instrument panel.
The engine starting prevention system  required by regulations is activated 
automatically once the AdBlue
® tank is empty. 
It is then no longer possible to start the 
engine until the minimum level of AdBlue
® has 
been topped up.
Manual display of the range
While the driving range is greater than 
1,500 miles (2,400   km), it is not displayed 
automatically.
You can view the range information by  pressing the " Diagnostic" button
  in the 
touch screen’s Driving
  / Vehicle menu.
Actions required related to a lack of AdBlue®
The following warning lamps light up when the 
quantity of AdBlue® is lower than the reserve 
level corresponding to a range of 1,500 miles 
(2,400
  km).
Together with the warning lamps, messages 
regularly remind you of the need to top up to 
avoid engine starting being prevented. Refer to 
the Warning and indicator lamps  section for 
details of the messages displayed.
For more information on  AdBlue® 
(BlueHDi engines), and in particular on 
topping up, refer to the corresponding section.
Warning 
lamps lit Action Remaining 
driving 
range
 
 
Top up. Between 1,500 miles 
and 500 
miles (2,400 
km and 
800
  km)
 
 
Top up as 
soon as 
possible.Between 
500 miles 
and 62 miles 
(800 km and 
100
  km)   
Page 15 of 196
13
Instruments
1Warning 
lamps litAction Remaining 
driving 
range
 
 
A top-up is 
essential, 
due to the 
risk that the 
engine will 
be prevented 
from starting.Between 
62 miles 
and 0 miles 
(100 km and 
0
  km)
 
 
To be able 
to restart 
the engine, 
add at least 
5 litres of 
AdBlue
® to 
its tank. 0 miles (km)
Malfunction of the SCR emissions 
control system
Malfunction detection
 
 
If a malfunction is detected, 
these warning lamps come on, 
accompanied by an audible 
signal and an "Emissions fault” 
message.
The alert is triggered while driving, when the 
fault is detected for the first time, and thereafter 
when switching on the ignition for subsequent 
journeys, while the cause of the fault persists.
If the fault is temporary, the alert 
disappears during the next journey, after 
self-diagnostic checks of the SCR emissions 
control system.
Malfunction confirmed during the 
permitted driving phase (between 685 
miles and 0
  miles (1,100 km and 0 km))
If the fault indication is still displayed 
permanently after 31 miles (50   km) of driving, the 
fault in the SCR system is confirmed.
The AdBlue warning lamp flashes, and an 
"Emissions fault: Starting prevented in X 
miles" or "NO START IN X miles" message is 
displayed, indicating the driving range in miles or 
kilometres.
While driving, the message is displayed every 30 
seconds. The alert is repeated when switching 
on the ignition.
You can continue driving for up to 685 miles 
(1,100
  km) before the  engine immobiliser  
system is triggered.
Have the system checked by a 
CITROËN dealer or a qualified workshop 
as soon as possible.
Starting prevented
Whenever the ignition is switched on, the 
"Emissions fault: Starting prevented" or "NO 
START IN" message is displayed.
To be able to restart the engine, contact  a CITROËN dealer or a qualified 
workshop.
Touch screen
The touch screen gives access to:
–  the heating / air conditioning controls,
–
 
menus for adjusting settings for vehicle 
functions and systems,
–
 
audio system and telephone controls and the 
display of associated information,
and, depending on equipment, allows:
–
 
the display of alert messages and the visual 
parking sensors information,
–
 
the permanent display of the time and the 
exterior temperature (a blue warning lamp 
appears when there is a risk of ice),
–
 
access to the internet services and navigation 
system controls and the display of associated 
information.
As a safety measure, the driver must 
only carry out operations that require 
sustained attention with the vehicle 
stationary.
Some functions are not accessible when 
driving.   
Page 19 of 196
17
Access
2Electronic key with 
remote control function 
and built-in key,
Remote control function 
 
The remote control can be used for the following 
remote functions, depending on version:
– 
Unlocking / Locking / Deadlocking the vehicle.
–
 
Unlocking the boot.
–
 
Opening the fuel tank cap (without Keyless 
Entry and Starting).
–
 
Unlocking / Locking the fuel filler flap (with 
Keyless Entry and Starting).
–
 
Locating the vehicle.
–
 
Activating the vehicle’
 s electronic immobiliser.
The remote control includes a conventional key 
that allows the central unlocking / locking of the 
vehicle using the door lock, as well as starting 
and switching off the engine. Back-up procedures allow the vehicle to be 
locked / unlocked in the event of a failure of the 
remote control, the central locking, the battery, 
etc. For more information on the Back-up 
procedures, please refer to the corresponding 
section.
Integral key
The key built into the remote control can be 
used for the following operations, depending on 
version:
–
 
Unlocking/Locking/Deadlocking the vehicle.
–
 
Activation/Deactivation of the manual child 
lock.
–
 
Activation/Deactivation of the front passenger 
airbag.
–
 
Back-up Unlocking/Locking of the doors.
–
 
Switching on the ignition and starting/switching 
off the engine.
Ejecting the key 
 
Version without Keyless Entry and Starting
►  T o eject the key from the housing, press the 
button.
►
 
Press the button before folding the key back 
to avoid damaging the mechanism.
 
 
Version with Keyless Entry and Starting
►  T o eject the key from the housing, pull and 
hold the button.
►
 
Pull and hold the button before returning the 
key
.
Unlocking the vehicle
With the remote control
► Press this button to unlock the vehicle.  
Rapid flashing of the direction indicators for a 
few seconds signals:
–
 
the unlocking of the vehicle for versions 
without alarm,  
Page 22 of 196
20
Access
When locking/deadlocking from the 
outside
When the vehicle is locked or deadlocked 
from the outside, the indicator lamp flashes 
and the button is inoperative.
►  After normal locking, pull one of the 
interior door controls to unlock the vehicle.
►  After deadlocking, it is necessary to use 
the remote control, Keyless Entry and Starting 
or the integral key to unlock the vehicle.
Automatic (anti-intrusion  security)
The doors and boot lock automatically when 
driving (speed above 6 mph (10 km/h)).
To deactivate/reactivate this function (activated 
by default):
►  Press the button until an audible signal is 
heard and a message appears in the screen.
Transporting long or bulky objects
Press the central locking control to drive 
with the boot open and the doors locked. 
Otherwise, every time the speed of the 
vehicle exceeds 6 mph (10 km/h), the locks 
will rebound and an alert will appear.
Pressing the central locking button unlocks 
the vehicle.
Above 6 mph (10 km/h), this unlocking is 
temporary.
It is not possible to lock the vehicle if one of the 
keys is left inside the vehicle.
Deadlocking  
Deadlocking deactivates the exterior and 
interior door controls, as well as the 
central locking button on the dashboard.
The horn remains operational.
Never leave anyone inside the vehicle when it 
is deadlocked.
►
 
With the electronic key in the recognition 
zone, press one of the front door handles once 
with your finger or thumb (at the markings) to 
lock the vehicle.
►
 
Within 5 seconds, press the door handle 
again to deadlock the vehicle.
If one of the doors or the boot is still open 
or if the electronic key for the Keyless 
Entry and Starting
 
 system has been left inside 
the vehicle, central locking will be disabled.
However
, if the vehicle is fitted with an alarm, 
it will be activated after 45
  seconds.
If the vehicle is unlocked but the doors or 
boot are not subsequently opened,   the 
vehicle will automatically lock itself again after 
about 30
  seconds. If the vehicle is fitted with 
an alarm, it will also be reactivated 
automatically.
The automatic door mirror folding/ unfolding function is configured via the 
touch screen’s vehicle configuration menu.
As a safety measure, never leave the  vehicle, even for a short time, without 
taking the Keyless Entry and Starting 
system’s electronic key with you.
Be aware of the risk of theft of the vehicle if 
the key is present in one of the defined areas 
while the vehicle is unlocked. 
Accumulations (water, dust, grime, salt,  etc.) on the inner surface of the door 
handle may affect detection.
If cleaning the inner surface of the door 
handle using a cloth does not restore 
detection, contact a CITROËN dealer or a 
qualified workshop.
A sudden splash of water (stream of water, 
high pressure jet washer, etc.) may be 
identified by the system as the desire to open 
the vehicle.
To preserve the battery charge in the  electronic key and the vehicle's battery, 
the "hands-free" functions are set to 
hibernation mode after 21 days without use. 
To restore these functions, press one of the 
remote control buttons or start the engine with 
the electronic key in the reader.
For more information on starting with the 
Keyless Entry and Starting system, refer to 
the corresponding section.
Electrical interference
The electronic key may not operate if 
close to certain electronic devices: telephone 
(switched on or on standby), laptop computer, 
strong magnetic fields, etc.
Central locking 
 
 
 
Manual
► Press this button to lock/unlock the vehicle 
(doors and boot) from inside the vehicle.
The indicator lamp comes on to confirm central 
locking of the vehicle.
The central locking does not take place if  one of the doors is open.  
Page 25 of 196
23
Access
2► Immediately press the closed padlock button 
for a few seconds.
►
 
Switch off the ignition and remove the key 
from the switch.
The remote control is now fully operational 
again.
With Keyless Entry and Starting 
 
► Insert the mechanical key (incorporated into 
the remote control) into the lock to open the 
vehicle.
►
 
Place the electronic key against the back-up 
reader under the parking brake lever and hold it 
there until the ignition is switched on.
►
 
Switch on the ignition by pressing the 
"
START/STOP" button.
►
 
W
 ith a manual gearbox, place the gear lever 
in neutral then fully depress the clutch pedal.
►
 
W
 ith an automatic gearbox,  while in mode 
P, depress the brake pedal.
If the fault persists after reinitialisation, contact a 
CITROËN dealer or a qualified workshop without 
delay.
Doors
Opening
From outside
► After unlocking the vehicle or with the 
Keyless Entry and Starting electronic key in the 
recognition zone, pull the door handle.
From inside
► Pull the interior opening control of a door; this 
unlocks the vehicle completely .
The interior opening control on a rear door does not work if the child lock is on.
For more information on the  Child Lock, refer 
to the corresponding section.
Closing
When a door is not closed correctly:
–  with the engine running or the vehicle 
moving (speed below 6 mph (10 km/h)) , a 
message appears in the screen.
–
 
with the vehicle moving (speed above 6 
mph (10 km/h))
, a message appears in the 
screen, accompanied by an audible signal.
Boot
Opening 
 
► With the vehicle unlocked or with the 
Keyless Entry and Starting electronic key in the 
recognition zone, press the  centre
 of the tailgate 
opening control.
►
 
Lift the tailgate.
For more information on the  Remote control
 or 
on the Keyless Entry and Starting, please refer 
to the corresponding section.
If there is a fault or if it is difficult to move 
the tailgate when opening or closing it, 
have it checked as soon as possible by a 
CITROËN dealer or a qualified workshop to 
prevent the problem becoming worse, and 
potentially causing the tailgate to drop and 
thereby inflicting serious injuries.   
Page 26 of 196
24
Access
If an opening (door or boot) is not 
properly closed, the vehicle is not locked, 
but the exterior perimeter monitoring will be 
activated after 45 seconds.
Deactivation
►  Press the remote control unlocking 
button.
or
►  Unlock the vehicle with the Keyless Entry and 
Starting system.
The monitoring system is deactivated: the 
indicator lamp in the button goes off and the 
direction indicators flash for about 2 seconds.
If the vehicle automatically locks itself 
again (as happens if a door or the boot is 
not opened within 30 seconds of unlocking), 
the monitoring system is automatically 
reactivated.
Triggering of the alarm
This is indicated by sounding of the siren 
and flashing of the direction indicators for 30 
seconds.
Depending on the country of sale, certain 
monitoring functions remain active until the alarm 
has been triggered eleven times consecutively.
When the vehicle is unlocked using the remote 
control or the Keyless Entry and Starting system, 
rapid flashing of the red indicator lamp in the 
button informs you that the alarm was triggered 
Closing 
 
► Lower the tailgate using the interior grab 
handle.
If the tailgate is not fully closed:
–
 
with the engine running or the vehicle 
moving (speed below 6 mph (10 km/h)) , a 
message appears in the screen.
–
 
with the vehicle moving (speed above 6 
mph (10 km/h))
, a message appears in the 
screen, accompanied by an audible signal.
Back-up release
To manually unlock the boot in the event of a 
battery or central locking failure.
Unlocking
► Fold the rear seats to gain access to the lock 
from inside the boot.
 
 
► Insert a small screwdriver into hole  A  of the 
lock to unlock the boot.
►
 
Move the latch to the left.
Locking after closing
If the fault persists after closing again, the boot 
will remain locked.
In the event of a fault with the central 
locking system, it is essential to 
disconnect the battery to lock the boot and so 
ensure complete locking of the vehicle.
Alarm
(Depending on version) 
 
 
 
System which protects and provides a deterrent 
against theft and break-ins.
Exterior perimeter monitoring
The system checks for opening of the vehicle.
The alarm is triggered if anyone tries to open a 
door, the boot or the bonnet, for example.
Self-protection function
The system checks for the putting out of service 
of its components.
The alarm is triggered if the battery, the central 
control or the siren wiring is put out of service or 
damaged.
For all work on the alarm system, contact 
a CITROËN dealer or a qualified 
workshop.
Locking the vehicle with full 
alarm system
Activation
► Switch off the ignition and exit the vehicle.
►  Lock or deadlock the vehicle using the 
remote control or with the “Keyless Entry and 
Starting” system.
When the monitoring system is active, the red 
indicator lamp in the button flashes once per 
second and the direction indicators come on for 
about 2 seconds.
The exterior perimeter monitoring is activated 
after 5 seconds.   
Page 30 of 196
28
Ease of use and comfort
Steering wheel 
adjustment
 
 
► When stationary, lower the control A to 
release the steering wheel.
►  Adjust the steering wheel height and reach to 
suit your driving position.
►  Raise the control  A to lock the steering 
wheel.
As a safety precaution, these operations  should only be carried out while the 
vehicle is stationary.
► Turn the knob manually to obtain the desired 
level of lumbar support.
Head restraint height 
adjustment
 
 
► To raise it, pull it upwards as far as possible 
(notch).
►
 
T
 o remove it, press the lug A and pull it 
upwards.
►
 
T
 o put it back in place, engage the head 
restraint rods in the openings keeping them in 
line with the seat backrest.
►
 
T
 o lower it, press the lug A and push down on 
the head restraint at the same time.
The head restraint has a frame with  notches which prevents it from lowering; 
this is a safety device in case of impact.
The adjustment is correct when the upper 
edge of the head restraint is level with the 
top of the head.
Never drive with the head restraints removed; 
they must be fitted and correctly adjusted.
Heated seats  
 
 
► With the engine running, use the adjustment 
knob to switch on and select the level of heating 
required:
0
 
: Off.
1
 
: Low.
2
 
: Medium.
3
 
: High.
The front seats can be heated individually.
Before leaving the vehicle, ensure that 
the adjustment knob of the passenger 
seat is at position
  0, so that the heating does 
not unnecessarily operate if no passenger is 
present during the next journey.
Do not use the function when the seat 
is not occupied.
Reduce the heating intensity as soon as 
possible.
When the seat and passenger compartment 
have reached a satisfactory temperature, 
switch the function off; reducing electricity 
consumption in turn decreases fuel 
consumption.
Prolonged use of the heated seats is not 
recommended for those with sensitive 
skin.
There is a risk of burns for people whose 
perception of heat is impaired (illness, taking 
medication, etc.).
To keep the heated pad intact and to prevent 
a short circuit:
–
 
do not place sharp or heavy objects on the 
seat,
–
 
do not kneel or stand on the seat,
–
 
do not spill liquids onto the seat,
–
 
never use the heating function if the seat 
is wet.   
Page 31 of 196
29
Ease of use and comfort
3Steering wheel 
adjustment
 
 
► When stationary, lower the control A to 
release the steering wheel.
►
 
Adjust the steering wheel height and reach to 
suit your driving position.
►
 
Raise the control  A
 to lock the steering 
wheel.
As a safety precaution, these operations  should only be carried out while the 
vehicle is stationary.
Mirrors
Door mirrors
The objects observed are, in reality,  closer than they appear.
Take this into account in order to correctly 
judge the distance of vehicles approaching 
from behind.
Electric adjustment 
 
 
 
► Turn control A to the right or to the left to 
select the corresponding mirror.
►  
Move the control in any of the four directions 
to adjust.
►
 
Return the control to the central position.
As a safety measure, the mirrors should be adjusted to reduce the blind spots.
Manual folding
You can manually fold the mirrors (parking 
obstruction, narrow garage, etc.)
►
 
T
 urn the mirror towards the vehicle. 
Electric folding
If your vehicle is fitted with this function, the 
mirrors can be folded electrically from the inside, 
with the vehicle parked and the ignition on:
 
 
► Turn control A to opposite the mark.
From outside: lock the vehicle using the remote 
control or the "Keyless Entry and Starting" 
system.
The folding and unfolding of the door mirrors when locking or unlocking the 
vehicle can be deactivated via the vehicle 
configuration menu.
Demisting - Defrosting
Demisting-defrosting of the door mirrors 
operates with the engine running, by 
switching on the heated rear screen.
For more information on  Demisting - defrosting 
the rear screen , refer to the corresponding 
section.   
Page 34 of 196
32
Ease of use and comfort
The manual air conditioning operates when the 
engine is running.
1.Recirculation of interior air.
2. Temperature adjustment.
3. Air distribution adjustment.
4. Air flow adjustment.
5. Air conditioning on / off.
►  Select the Air conditioning  touch 
screen menu to display the controls page 
for the system.
Temperature adjustment
►  Press one of the arrows 2, or move the 
slider from blue (cold) to red (hot) to adjust the 
temperature to your liking.
Air flow  adjustment
► Press one of the buttons 4 to increase or 
decrease the speed of the air booster fan.
The air flow symbol (a fan) is filled in 
progressively as the speed of the fan is 
increased.
By reducing the air flow to a minimum, you are 
stopping ventilation.
Avoid driving for too long without  ventilation - risk of misting and 
deterioration of air quality!
Air distribution adjustment
You can vary the air distribution in the passenger 
compartment using the buttons  3.
Advice
Using the ventilation and air 
conditioning system
►
 
T
o ensure that air is distributed evenly, 
keep the external air intake grilles at the base 
of the windscreen, the nozzles, the vents, the 
air outlets and the air extractor in the boot 
free from obstructions.
►
 
Do not cover the sunshine sensor located 
on the dashboard; this sensor is used to 
regulate the automatic air conditioning 
system.
►
 
Operate the air conditioning system for at 
least 5 to 10 minutes once or twice a month to 
keep it in perfect working order
.
►
 
If the system does not produce cold air
 , 
switch it off and contact a CITROËN dealer or 
a qualified workshop.
When towing the maximum load on a steep 
gradient in high temperatures, switching off 
the air conditioning increases the available 
engine power, enhancing the towing capacity.
Avoid driving for too long with the  ventilation off or with prolonged operation 
of interior air recirculation. Risk of misting and 
deterioration of the air quality!
If the interior temperature is very high 
after the vehicle has stood for a long 
time in the sunshine, air the passenger 
compartment for a few moments.
Put the air flow control at a setting high 
enough to quickly change the air in the 
passenger compartment.
Condensation created by the air 
conditioning results in a discharge of 
water underneath the vehicle. This is perfectly 
normal.
Servicing the ventilation and air 
conditioning system
►
 
Ensure that the passenger compartment 
filter is in good condition and have the filter 
elements replaced regularly
.
We recommend using a composite passenger 
compartment filter. Thanks to its special active 
additive, this type of filter helps to purify the 
air breathed by the occupants and keep the 
passenger compartment clean (by reducing 
allergic symptoms, unpleasant odours and 
greasy deposits).
►
 
T
o ensure correct operation of the 
air conditioning system, have it checked 
according to the recommendations in the 
Maintenance and Warranty Guide.
Stop & Start
The heating and air conditioning systems 
only operate when the engine is running.
Temporarily deactivate the Stop & Start 
system to maintain a comfortable temperature 
in the passenger compartment.
For more information on the  Stop & Start, 
refer to the corresponding section.
Heating / Manual air 
conditioning
 
 
The heating only operates when the engine is 
running.
 
   
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33
Ease of use and comfort
3The manual air conditioning operates when the 
engine is running.
1.Recirculation of interior air.
2. Temperature adjustment.
3. Air distribution adjustment.
4. Air flow adjustment.
5. Air conditioning on / off.
► Select the  Air conditioning  touch 
screen menu to display the controls page 
for the system.
Temperature adjustment
► Press one of the arrows  2, or move the 
slider from blue (cold) to red (hot) to adjust the 
temperature to your liking.
Air flow  adjustment
► Press one of the buttons  4 to increase or 
decrease the speed of the air booster fan.
The air flow symbol (a fan) is filled in 
progressively as the speed of the fan is 
increased.
By reducing the air flow to a minimum, you are 
stopping ventilation.
Avoid driving for too long without  ventilation - risk of misting and 
deterioration of air quality!
Air distribution adjustment
You can vary the air distribution in the passenger 
compartment using the buttons  3.
Windscreen. 
Central and side vents. 
Footwells. 
Each press on a button activates or deactivates 
the function.
The three buttons can be activated  simultaneously. In this case, the flows of 
air from the central and side vents and the 
footwell vents are favoured.
Air conditioning On / Off
The air conditioning is designed to operate 
efficiently in all seasons, with the windows 
closed.
It allows you:
–
 
lower the temperature, in summer
 ,
–
 
increase the effectiveness of the demisting in 
winter
, above 3°C.
►
 
Press button 
 5 to activate/deactivate the air 
conditioning system.
When the indicator lamp is on, the air 
conditioning function is activated.
The air conditioning does not operate  when the air flow adjustment is inhibited.
Automatic air conditioning
The air conditioning operates with the engine 
running, but the ventilation and its controls can 
be accessed with the ignition on.
Operation of the air conditioning and regulation 
of temperature, air flow and air distribution 
in the passenger compartment are regulated 
automatically.
► Select the  Air conditioning  touch 
screen menu to display the controls page 
for the system.
1. Recirculation of interior air.
2. Temperature adjustment.
3. Air distribution adjustment.
4. Air flow adjustment.
5. Air conditioning on / off.
6. Access to the secondary page.
7. Automatic mode.
Depending on equipment.
The locations of the buttons of the lower 
band may vary, depending on equipment.