CITROEN C3 AIRCROSS 2021 Handbook (in English)
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1If a warning lamp remains lit
The references (1), (2) and (3) in the warning 
and indicator lamp description indicate whether 
you should contact a qualified professional in 
addition to the immediate recommended actions.
(1): You must stop the vehicle.
Stop as soon as it is safe to do so and switch off 
the ignition.
(2): Contact a CITROËN dealer or a qualified 
workshop.
(3): Visit a CITROËN dealer or a qualified 
workshop.
List of warning and 
indicator lamps
Red warning/indicator lamps
STOP
Fixed, associated with another warning lamp, accompanied by the display of a 
message and an audible signal.
A serious fault with the engine, braking system, 
power steering or a major electrical fault has 
been detected.
Carry out (1) and then (2).
Parking brakeFixed.The parking brake is applied or not 
properly released.
BrakingFixed.The brake fluid level in the braking circuit 
has dropped significantly.
Carry out (1), then top up with fluid that complies 
with the manufacturer's recommendations. If the 
problem persists, carry out (2).
Fixed.The electronic brake force distribution (EBFD) system is faulty.Carry out (1) and then (2).
Door(s) openFixed, associated with a message identifying the access.
A door or the tailgate is not properly closed 
(speed less than 6 mph (10 km/h)).
Fixed, associated with a message identifying the access, accompanied by 
an audible signal.
A door or the tailgate is not properly closed 
(speed above 6 mph (10 km/h)).
Seat belts not fastened / unfastened
Fixed or flashing, accompanied by an increasing audible signal.
A seat belt has not been fastened or has been 
unfastened.
12 V battery chargeFixed.
The battery charging circuit has a fault 
(dirty terminals, slack or cut alternator belt, etc.). Clean and retighten the terminals. If the warning 
lamp does not go off when the engine is started, 
carry out (2).
Engine oil pressureFixed.There is a fault with the engine lubrication 
system.
Carry out (1) and then (2).
Maximum engine coolant temperatureFixed.The temperature of the cooling system is 
too high.
Carry out (1), then wait until the engine has 
cooled down before topping up the level, if 
necessary. If the problem persists, carry out (2).
Engine self-diagnostics systemFixed.A major engine fault has been 
detected.
Carry out (1) and then (2).
Orange warning/indicator lamps
Engine self-diagnostics system
Fixed.A minor engine fault has been 
detected.
Carry out (3).
Flashing.The engine management system has a 
fault.
There is a risk that the catalytic converter will be 
destroyed.   
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You must carry out (2).Fixed.The emissions control system has a fault.
The warning lamp should go off when the engine 
is started.
Carry out (3) quickly.
Collision Risk Alert/Active Safety BrakeFlashing.The system activates and brakes the 
vehicle momentarily so as to reduce the speed of 
collision with the vehicle ahead.
Fixed, accompanied by a message and an audible signal.
The system has a fault.
Carry out (3).
Fixed, accompanied by the display of a message.
The system has been deactivated via the vehicle 
configuration menu.
Anti-lock braking system (ABS)Fixed.The anti-lock braking system has a fault.
The vehicle retains conventional braking.
Drive carefully at moderate speed, then carry 
out (3).
Under-inflationFixed, accompanied by an audible signal and a message.
The pressure in one or more tyres is too low.
Check the pressure of the tyres as soon as 
possible. Reinitialise the detection system after adjusting 
the pressure.
Under-inflation warning lamp flashing then fixed and Service 
warning lamp fixed.
The tyre pressure monitoring system is faulty.
Under-inflation detection is no longer monitored.
Check the tyre pressures as soon as possible 
and carry out (3).
Dynamic stability control (DSC) / Anti-slip 
regulation (ASR)
Fixed.The system is deactivated.
The DSC / ASR system is automatically 
reactivated when the vehicle is restarted, and 
from around 31 mph (50 km/h).Below 31 mph (50 km/h), it can be reactivated manually.Flashing.DSC/ASR regulation is activated in the 
event of a loss of grip or trajectory.
Fixed.The DSC/ASR system has a fault.
Carry out (3).
AirbagsFixed.One of the airbags or seat belt 
pyrotechnic pretensioners is faulty.
Carry out (3).
Front passenger airbag (OFF)Fixed.The front passenger airbag is deactivated. The control is in the "OFF
" position.
A "rearward facing" child seat can be installed, 
unless there is a fault with the airbags (Airbags 
warning lamp on).
Particle filter(Diesel)Fixed, accompanied by an audible signal and a message about the risk of particle 
filter blockage.
The particle filter is starting to saturate.
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.Fixed, accompanied by an audible signal and a message signalling that the additive 
level in the particle filter is too low.
The minimum level of the additive tank is 
reached.
Quickly have the tank topped up: carry out (3)
Low fuel levelFixed, accompanied by an audible signal and a message.
When it first comes on, there remains 
approximately 5 litres of fuel in the tank 
(reserve).
Refuel without delay to avoid running out of fuel.
Never drive until completely empty, as 
this could damage the emissions control and 
injection systems.   
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1Water in Diesel fuel filter (depending on 
version)
Fixed.The Diesel filter contains water.
Carry out (2) without delay - risk of damage to 
the injection system!
Lane Departure Warning SystemFlashing, accompanied by an audible signal.
A lane marking has been crossed on the left or 
right.
Turn the steering wheel in the opposite direction 
to return to the correct trajectory.
Fixed, accompanied by the display of a message.
The system has a fault.
Stay alert and drive carefully, then carry out (3).
Fixed.The system has been deactivated.
If there is an unexpected change of direction, 
you will no longer be warned by the system.
AdBlue® (BlueHDi)
On for around 30 seconds when starting the vehicle, accompanied by a message 
indicating the driving range.
The driving range is between 1,500 and 500 
miles (2,400 and 800 km).Top up the AdBlue®.Fixed, on switching on the ignition, accompanied by an audible signal and a  message indicating the driving range.
The driving range is between 500 and 62 miles 
(800 and 100 km).Promptly top up the AdBlue®, or carry out (3).Flashing, accompanied by an audible signal and a message indicating the 
driving range.
The driving range is less than 62 miles (100 km).You must top up the AdBlue® to avoid engine 
starting being prevented, or carry out (3).Flashing, accompanied by an audible signal and a message indicating that 
starting is prevented.
The AdBlue
® tank is empty: the regulatory engine 
immobiliser prevents the engine from being 
restarted.
To restart the engine, top up the AdBlue
®, or carry out (2).You must add at least 5 litres of AdBlue® to its 
tank.
SCR emissions control system(BlueHDi)Fixed when the ignition is switched on, 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.
AdBlue® warning lamp 
flashing upon switching on 
the ignition, with the Service and Engine 
self-diagnostics warning lamps on fixed, 
accompanied by an audible signal and a  message indicating the driving range.
Depending on the message displayed, it may be 
possible to drive for up to 685 miles (1,100 km) before the engine immobiliser is triggered.
Carry out (3) without delay, to 
avoid starting 
being prevented.
AdBlue® warning lamp 
flashing upon switching on 
the ignition, with the Service and Engine 
self-diagnostics warning lamps on fixed, 
accompanied by an audible signal and a 
message indicating that starting is prevented.
The 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).
ServiceTemporarily on, accompanied by the display of a message.
One or more minor faults, for which there is/are 
no specific warning lamp(s), have been detected.
Identify the cause of the fault using the message 
displayed in the instrument panel.
It is possible to deal with some faults yourself, 
such as changing the battery of the remote 
control.
For other faults, such as with the tyre under-
inflation detection system, carry out (3).
Fixed, accompanied by the display of a message.
One or more major faults, for which there is/are 
no specific warning lamp(s), have been detected.   
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Indicators
Engine coolant temperature 
gauge
 
  
 
With the engine running:–  in zone A, the temperature is correct,– in zone B, the temperature is too high; this 
warning lamp and the central  STOP warning 
lamp come on in the instrument panel, 
accompanied by the display of a message and 
an audible signal.
You MUST stop as soon as it is safe to do so.
Wait a few minutes before switching off the 
engine.
After first switching off the ignition, open  the bonnet cautiously and check the 
coolant level.
Identify the cause of the fault using the message displayed in the instrument panel, then carry out 
(3).
Service warning lamp fixed and service spanner flashing then 
fixed.
The servicing interval has been exceeded.
The vehicle must be serviced as soon as 
possible.
Only with BlueHDi Diesel engines.
Diesel engine preheatingTemporarily on(up to approximately 30 seconds in 
severe weather conditions).
When switching on the ignition, if the weather 
conditions and the engine temperature make it 
necessary.
Wait until the warning lamp goes off before 
starting.
When the warning lamp goes off, starting will 
occur immediately if you press and hold:
– the clutch pedal with a manual gearbox.– the brake pedal with an automatic gearbox.
If the engine does not start, make the engine 
starting request again, while keeping your foot 
on the pedal.
Rear foglampFixed.The lamp is on.
Green warning/indicator lamps
Blind spot monitoring
Fixed.The function has been activated.
Hill Assist DescentFixed.The system has been activated, but the 
conditions for regulation are not met (gradient, 
speed too high, gear engaged).
Flashing indicator.The function is starting regulation.
The vehicle is being braked; the brake lamps 
come on during the descent.
Stop & StartFixed.When the vehicle stops, the Stop & Start 
puts the engine into STOP mode.
Flashing temporarily.STOP mode is momentarily unavailable 
or START mode is automatically triggered.
Direction indicatorsFlashing with audible signal.
The direction indicators are on.
SidelampsFixed.The lamps are on.
Front foglampsFixed.The front foglamps are lit.
Automatic wipingFixed.Automatic windscreen wiping is activated.
Automatic headlamp dippingFixed.The function has been activated 
via the touch screen (Driving / Vehicle menu).
The lighting control stalk is in the "AUTO" 
position.
Dipped beam headlampsFixed.The lamps are on.
Blue warning/indicator lamps
Main beam headlamps
Fixed.The lamps are on.
Black/white warning lamps
Foot on the brake
Fixed.Omission or insufficient pressure on the 
brake pedal.
With an automatic gearbox, with the engine 
running, before releasing the parking brake, to 
move out of position P.
Automatic wipingFixed.Automatic front wiping is activated.   
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1Indicators
Engine coolant temperature 
gauge
 
  
 
With the engine running:– in zone A, the temperature is correct,– in zone B, the temperature is too high; this 
warning lamp and the central  STOP warning 
lamp come on in the instrument panel, 
accompanied by the display of a message and 
an audible signal.
You MUST stop as soon as it is safe to do so.
Wait a few minutes before switching off the 
engine.
After first switching off the ignition, open  the bonnet cautiously and check the 
coolant level.
For more information on  Checking 
levels, refer to the corresponding 
section.
Service indicator
The servicing information is expressed in terms 
of distance (kilometres or miles) and time 
(months or days).
The alert is given at whichever of these two 
terms is reached first.
The servicing information is displayed in the 
instrument panel. Depending on the version of 
the vehicle:
– The distance recorder display line indicates the distance remaining before the next service 
is due, or the distance travelled since it was due 
preceded by the "-" sign.
– An alert message indicates the distance remaining, as well as the period before the next 
service is due or how long it is overdue.
The value indicated is calculated  according to the distance covered and 
the time elapsed since the last service.
The alert may also be triggered close to a 
due date.
Service spannerOn temporarily when the ignition is switched on.
Between 620 and 1,860 miles (1,000 and 3,000 
km) remain before the next service is due.
Fixed, when the ignition is switched on.The next service is due in less than 620 
miles (1,000 km).
Have your vehicle serviced very soon.
Service spanner flashingFlashing then fixed, when the ignition is switched on.
(With BlueHDi Diesel engines, combined with the 
Service warning lamp.)
The servicing interval has been exceeded.
Have your vehicle serviced as soon as possible.
Resetting the service indicator
The service indicator must be reset after each 
service.
► Switch off the ignition. 
  
CHECK
 
► Press and hold this button.► Switch on the ignition; the distance recorder display begins a countdown.► Release the button when =0 is displayed; the 
spanner disappears.
If you have to disconnect the battery 
following this operation, lock the vehicle    
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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/indicator  lamps lit Action
Remaining 
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)
and wait at least 5 minutes for the reset to be 
registered.
Retrieving the service information
You can access the service information at any 
time.
► Press this button.The service information is displayed for a few 
seconds, then disappears.
Engine oil level 
indicator
(depending on version)
On versions fitted with an electric oil level 
indicator, the state of the engine oil level is 
displayed in the instrument panel for a few 
seconds, after the servicing information.
The level read will only be correct if the 
vehicle is on level ground and the engine 
has been off for more than 30 minutes.
Oil level correct
This is indicated by the display of the " Oil level 
correct " message.
Oil level insufficient
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 signalled by the display of the " Oil 
level measurement invalid" message on the 
instrument cluster.
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 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.
Manually displaying the driving range
While the driving range is greater than 1,500 miles (2,400 km), it is not displayed automatically. 
  
CHECK
 
► Press this button to temporarily display the driving range.You can view the range information by pressing the " Diagnostic" button after selecting the " Driving functions " tab in the 
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    
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1level 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/ indicator  lamps lit Action
Remaining 
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)
Warning/
indicator  lamps lit Action
Remaining 
range
 
 
A top-up is 
vital, there is 
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 the 
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.   
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Monochrome screen C
Displays in the screen 
 
This displays the following information:– the time,– the date,– the exterior temperature (this flashes if there is a risk of ice),– visual parking sensor information,– the audio source being listened to,– telephone or hands-free kit information,– alert messages,– settings menus for the screen and the vehicle equipment.
Controls 
 
To be able to restart the engine, contact 
a CITROËN dealer or a qualified 
workshop.
Distance recorders
The total and trip distances are displayed for 
thirty seconds when the ignition is switched off, 
when the driver's door is opened and when the 
vehicle is locked or unlocked.
When travelling abroad, you may have to 
change the units of distance: the display 
of road speed must be in the official units 
(miles or km) for the country.
The change of units is done via the screen 
configuration menu, with the vehicle 
stationary.
Total distance recorder 
  
 
It measures the total distance travelled by the 
vehicle since its first registration.
Trip distance recorder 
  
 
It measures the distance travelled since it was 
reset by the driver.
Resetting the trip recorder
 
 
► With the ignition on, press the button until dashes appear.
Equipment configuration 
for vehicles without 
screen
If your vehicle does not have an audio system 
or a touch screen, you can still configure some 
equipment by using the  LCD text instrument 
panel display.
Control buttons 
 
A long press of this button takes you to the configuration menu, a short press 
confirms.
Pressing one of these buttons lets you move in a menu, a list; change 
a value.
Pressing this button takes you back up a level or cancels the current operation.
Display screen menus
– LIGHTING :• GUIDE LAMPS (Guide-me-home lighting),• DIR HEADLAMPS (Directional headlamps).– DRIVE ASSIST : • COLLISION  ALT (Automatic emergency braking),• VIGILANCE ALT (Fatigue Detection System),• ADVISED SPEED (Speed limit recognition).– COMFORT : • REAR WIPE REV (Automatic windscreen wiper when reversing).
For more information on one of these functions, 
refer to the corresponding section.   
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1Monochrome screen C
Displays in the screen 
 
This displays the following information:– the time,– the date,– the exterior temperature (this flashes if there is a risk of ice),– visual parking sensor information,– the audio source being listened to,– telephone or hands-free kit information,– alert messages,– settings menus for the screen and the vehicle equipment.
Controls 
 
On the audio system control panel, use the 
following buttons:
MENUAccess the main menu
5 or 6 Scroll through the items on the screen
7 or 8 Change a setting value
OK Validate
Back Abandon the current operation
Main menu 
 
► Press the MENU button for access to the 
main menu:
• "Multimedia",• "Telephone",• "Trip computer",• "Connections",• "Personalisation-configuration".► Press the "7" or "8" button to select the 
menu required, then confirm by pressing the  OK 
button.
“Multimedia" menu  
With the audio system on, this menu allows 
you to activate or deactivate radio functions 
(RDS, DAB / FM auto tracking, RadioText (TXT) display) or set the media play mode (Normal, 
Random, Random all, Repeat). For more information about the "Multimedia” 
application, refer to the "Audio equipment and 
telematics” section.
“Telephone" menu  
With the audio system on, this menu allows you 
to make a call or view the various telephone 
directories.
For more information about the "Telephone” 
application, refer to the "Audio equipment and 
telematics” section.
“Trip computer" menu  
This menu allows you to consult information 
concerning the status of the vehicle.
Warning log
It summarises the alert messages of the 
functions, displaying them on the screen.
“Connections" menu  
With the audio system on, this menu allows a 
Bluetooth device (telephone, media player) to be 
paired and the connection mode to be defined 
(hands-free kit, playing of audio files).   
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Menus 
 
Radio Media.
See “Audio equipment and telematics” 
section..
Mirror Screen or Connected navigation 
(depending on equipment) .
See “Audio equipment and telematics” section..
Air conditioning.Allows adjustment of the various settings 
for temperature, air flow, etc.
For more information on  Heating, Manual air 
conditioning  and Automatic air conditioning , 
please refer to the corresponding sections.
Telephone.See “Audio equipment and telematics” 
section..
Applications.
Allows the display of the connected 
services available.
See “Audio equipment and telematics” section.
Vehicle or Driving (depending on 
equipment) .
Allows the activation, deactivation and 
adjustment of settings for certain functions.
For more information about the "Connections” application, refer to the "Audio equipment and 
telematics” section.
“Personalisation-
configuration" menu
  
This menu gives access to the following 
functions:
– “Define the vehicle parameters".– “Display configuration".
Define the vehicle parameters
This menu allows the following equipment to be 
activated / deactivated, depending on the version 
and/or country of sale:
"Lighting "
– "Directional headlamps",– "Follow-me-home headlamps",– "Welcome lighting"."Comfort"– "Rear wipe in reverse gear".
"Driving assistance"– Auto. emergency braking,– Fatigue Detection System,– Speed recommendation.For more information on the different equipment, 
refer to the corresponding sections.
Display configuration
This menu allows you to change the language 
used by the display from a defined list.
This menu gives access to the following settings:– “Choice of units".– “Date and time adjustment".– “Display personalisation".– “Choice of language".
As a safety measure, the driver must only 
carry out operations that require 
sustained attention when stationary.
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.
Recommendations
This screen is of the capacitive type.
Use is possible in all temperatures.
Do not use pointed objects on the touch screen.
Do not touch the touch screen with wet hands.
Use a soft clean cloth to clean the touch screen.
Workflow
Use the buttons on each side of the touch screen 
to access the menus, then use the buttons that 
appear on the touch screen.
Certain functions may be displayed over 1 or 2 
pages.
To deactivate / activate a function, press OFF/
ON.
To modify a setting (lighting duration, etc.) or 
access additional information, press the symbol 
for the function.
After a few moments with no action on  the secondary page, the primary page is 
displayed automatically.
Use this button to confirm. 
Use this button to return to the previous page.