2021 CITROEN C4 AIRCROSS check engine

212
Running out of fuel (Diesel)
On vehicles fitted with the 1.6 litre HDi 110
engine, the fuel system must be manually
primed if you run out of fuel; refer to the
corresponding Diesel engine compartment
view.
1.6 litre HDi engine
F Fill the fuel tank with at least five litres of diesel.
F

O
pen the bonnet.
F

I
f necessary, unclip the styling cover for
access to the priming pump.
F

S
queeze and release the priming pump
repeatedly until resistance is felt (there
may be resistance at the first press).
F

O
perate the starter until the engine starts
(if the engine does not start at the first
attempt, wait around 15 seconds before
trying again).
F

I
f the engine does not start after a few
attempts, operate the priming pump again
then start the engine.
F

C
lip the styling cover back in place.
F

C
lose the bonnet.
Checks

213
Checking levels
Take care when working under the bonnet, as certain areas of the engine may be extremely hot (risk of burns) and the cooling fan could start at
any time (even with the ignition off).
Oil level
The check of the the level is done
out with the dipstick, located under
the bonnet. Refer to the description
of your engine compartment for the
position of the dipstick.Engine oil change
Refer to the maintenance and warranty guide
for details of the interval for this operation.
In order to maintain the reliability of the engine
and emission control system, never use
additives in the engine oil.
Oil specification
The oil must be the correct grade for your
engine and conform to the manufacturer's
recommendations.
Check all of these levels regularly, in line with the maintenance and warranty guide. Top them up if necessary, unless other wise indicated.
If a level drops significantly, have the corresponding system checked by a CITROËN dealer or a qualified workshop.
Dipstick
There are two marks on the dipstick:
A = maximum
If the level is above this
mark, contact a CITROËN
dealer or a qualified
workshop.
B = minimum
Top up the level through the
oil filler orifice, using the
correct grade of oil for your
engine. The level must never
be below this mark.
This check will only be correct if the vehicle is
on level ground and the engine has been off for
more than 30 minutes.
It is normal to top up the oil level between
two services (or oil changes). CITROËN
recommends that you check the level, and top
up if necessary, every 3 000 miles (5 000 km).
After topping up the oil, the check when
switching on the ignition with the oil level
indicator in the instrument panel is not valid
during the 30 minutes after topping up.
8
Checks

214
Coolant level
The coolant level should be between
the two marks.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 any risk of scalding, unscrew the cap
by two turns to allow the pressure to drop.
When the pressure has dropped, remove the
cap and top up the level.
Fluid specification
The coolant must conform to the
manufacturer's recommendations.
The brake fluid level should be close
to the "MA X" mark. If it is not, check
the brake pad wear.
Brake fluid level
Changing the fluid
Refer to the maintenance and warranty guide
for details of the interval for this operation.
Fluid specification
The brake fluid must conform to the
manufacturer's recommendations and meet
the
DOT3 or DOT4 standard.
The cooling fan may star t after switching
off the engine: take care with ar ticles and
clothing that might become caught by the
fan blades. When the engine is warm, the temperature of
the coolant is regulated by the fan.
Checks

215
Avoid prolonged contact of used oil or
fluids with the skin.
Most of these fluids are harmful to
health or indeed very corrosive.
Do not discard used oil or fluids into
sewers or onto the ground.
Take used oil to a CITROËN dealer or
a qualified workshop (France) or to an
authorised waste disposal site.
Used products
To p p i n g u p
The reservoir must be topped up without delay
by a CITROËN dealer or a qualified workshop.
Additive level (1.6 HDi
110 Diesel versions with
particle filter)
The additive reservoir low level is indicated by
the display of this message.
Fluid specification
For optimum cleaning, this fluid must not be
topped up with or replaced with plain water.
Screenwash and headlamp
wash fluid
To check or top up the fluid, stop the
vehicle, apply the parking brake and
switch off the engine.
F

O

pen the bonnet and secure it with the
st ay.
F
o
p

en the filler cap for the screenwash
reservoir.
F

C

heck the level using the gauge, then
top-up if necessary.
F

R

efit the cap on the reservoir and close the
bonnet. In wintry conditions, the use of fluid with
an ethyl alcohol or methanol base is
recommended.
8
Checks

216
Checks
12 V battery
Electrolyte level
For access to the battery, refer to the
"12V battery" section.Refer to the maintenance and
warranty guide for details of the
replacement intervals for these
components.
Air filter and passenger compartment filter
Replace the oil filter each time the
engine oil is changed.
Refer to the maintenance and
warranty guide for details of the
replacement interval for this
component.
Oil filter
If necessary, top up using distilled water,
removing the battery cap from each cell.
Check the electrolyte level at least once
a
month.
When carrying out work on the battery, refer
to "12V battery" section for details of the
precautions to be taken before disconnecting
the battery and following its reconnection.
Unless other wise indicated, check these components in accordance with the maintenance and warranty guide and according to your engine.
Other wise, have them checked by a CITROËN dealer or a qualified workshop.
The electrolyte level must be between the
"LOWER LEVEL" and "UPPER LEVEL" marks.
Depending on the environment (e.g. dusty
atmosphere) and the use of the vehicle
(e.g. city driving), replace them 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.
Checks

217
Manual gearbox
Refer to the maintenance and
warranty guide for servicing of the
gearbox.
"CVT" gearbox
Refer to the maintenance and
warranty guide for servicing of the
"CVT" gearbox.
Particle filter (Diesel)
The start of saturation of the particle filter is
indicated by the temporary illumination of this
warning lamp accompanied by a message in
the instrument panel screen.As soon as the traffic conditions permit,
regenerate the filter by driving at a
speed of at least 25 mph (40 km/h) for
about 20 minutes (with the 1.6 litre HDi
engine the minimum speed is 36 mph
(60 km/h)).
If the warning lamp stays on, this
indicates a low additive level.
on a n

ew 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.
8
Checks

335
ABS and EBFD systems ...............................14 2ac
cessories .............................. ....................204
Accessory socket, 12V

...................... 9
0, 92, 93
a

ccess to bulbs
............................................. 18

3
ac

tive stability control (
aS
C)
........................14

4
Adjusting headlamps
.................................... 13

3
Adjusting head restraints

................................73
A

djusting seat belt height
.............................14

6
Adjusting the steering wheel

..........................79
A

irbag, knee
.......................................... 15

2, 15 4
Airbags
...............

........................................... 150
Airbags, curtain
..................................... 15

3, 15 4
Airbags, front......................................... 150, 15 4
Airbags, lateral
...................................... 15

2, 15 4
Air conditioning
...............................

.......... 10, 81
Air conditioning, automatic
................................................ 8

1, 84
Air conditioning, manual
...............

..................................... 81, 82
ai

r filter
...............
........................................... 216
ai

r flow
..............................
..............................80
Air intake

...............
....................................83, 86
ai

r vents
..............................
............................80
Alarm
............................................................... 65
A

nti-lock braking
system (ABS)

.............................................. 14

2
Anti-theft
..............................

................... 61, 102
apple® player ............... 278, 279, 280, 304, 306
Armrest, front ...................................... 7 4, 90, 93
Armrest, rear

................................................... 76aSC ........

....................................................... 14 4
ash

tray, portable
.......................................9
0, 92
Audible warning
............................................ 1

41
Audio-CD
..............................

....... 276, 303, 323
Audio file formats

.......................................... 2

76
Audio streaming (
b
lu

etooth)
..............................
............330, 331
Audio systems

............................... 2
49, 289, 311Audio-telematics
...............................

............
249
Automatic illumination of headlamps
...................................... 1
28, 130
Automatic operation
of hazard warning lamps
............................
1
41
Automatic rain sensitive windscreen wipers
...................................... 13
6
Automatic switching off of lighting
................
13
0
Auxiliary
sockets
...........9
4, 278 -281, 304-308, 328 -329
AC
Capacity, fuel tank ..............................
..........210
CD changer ............................... ....................325
CD MP3

................
........................ 276, 303, 325
Central locking

.......................................... 5

2-59
Changing a bulb
..................................... 18

2-187
Changing a fuse
..................................... 1

8 8 -19 3
Changing a wheel

...............................
...175 -178
Changing a wiper blade
...............

............................................ 197
Changing the remote control battery ............................................... 60
Changing the time
.............................. 4

4, 46, 49
Checking levels

...................................... 21

3 -215
Checking the engine oil level
...............

......................................... 213
Checks
...............

.................................... 2 07-218
Children
...............................

... 149, 151, 155 -170
Child lock

...............................
........................170
Child seats

................... 1
55, 156, 160 -162, 169
Child seats, ISOFIX

...................................... 16

6
Cigarette lighter............................................... 92
Closing the boot

...............................
...............63
Closing the doors

...............................
.............62
Colour screen
....................... 2

50, 253, 290, 293
Connectors, audio
.............. 9

4, 278 -281, 304-305, 328 -329
Controls for air conditioning
...............................

........82, 84
Coolant
...............................

.............................35
Coolant level
..............................

...................214
Courtesy lamp, front

..................................... 13

8
Courtesy lamp, rear

...................................... 13

9
Cruise control
................................................ 12

0
Cup holder

...............................
........................90
CVT gearbox

......................................... 1
05, 217
bat

tery
...............................

.................... 194, 216
Battery, charging
...............................

............ 19 6
Battery, remote control

.............................6

0, 61
bl

uetooth (telephone)
....................2

37, 288, 308
bl

uetooth telephone
with voice recognition

.......................... 2

37-24 8
bo

nnet
...............

............................................ 207
bo

nnet stay
................................................... 2

07
b

oot
........

......................................................... 63
Boot lamp

...................................................... 14

0
Bottle holder

...............................

..................... 90
Brake discs

.................................................... 2

18
Brake lamps

...............................

................... 18 6
Brake pads
...............................

..................... 218
Braking assistance system

................

......................................... 142
bulb

s
(changing, type)
................................... 18

2-187
B
.
alphabetical index

338
Reversing lamps ...........................................18 6
Roof bars ....................................................... 20
3
Roof blind

...............................
.........................70
Routine checks

..................................... 21

6, 218
Running out of fuel (Diesel)

..........................2

12
Screen (audio equipment)

................. 4
4, 46, 48
Screen, instrument panel

..........................1

9 - 31
Screen menu

...............................
......... 253, 294
Screenwash, front
......................................... 13

5
Screenwash reservoir
................................... 2

15
SD card

..............................
.......... 265, 279, 280
Seat adjustment

...............................
......... 71, 72
Seat back storage pockets

.............................95
Se

at belts
............................................... 14

6 -149
Seat belts warning lamp

...............................14

6
Seats, electric
................................................. 72
S

eats, rear
....................................................... 75
S

erial number, vehicle
..................................23

5
Service indicator
............................................. 33
S

ervicing
...............................
..........................10
Setting the clock

................................ 4
4, 46, 48
Sidelamps
.....................................1

82, 184, 186
Side repeater
..............................

..................185
Ski flap

..............................
..............................76
Snow chains
.................................................. 18

1
Spare wheel
...............................

........... 114, 176
Speedometer
..............................

....................12
Spotlamps, side
............................................ 18

5
Starting the vehicle

...................................9
8, 99Steering mounted controls,
audio ............... ............................ 251, 291, 314
Stopping the vehicle

.................................9
8, 99
Stop & Start system (
au

to Stop Go)
............................................111
St

orage
................
................................ 76, 91, 96
Stowing rings
..............................

..............96, 97
Sun visor
......................................................... 91
S

ystem, audio- CD..................................311-333
System, audio-telematics
..................... 24

9 -288
Table of weights

.....................2

20-225, 227-232
Tables of engines

...............................
... 219, 226
TCL
........

........................................................14 4
Technical data
....................................... 2

19 -232
Telephone
........................................... 3

08, 309
Telephone, with voice recognition

.........2

37-24 8
Temperature adjustment
...........................8

2, 84
Temperature, coolant
...................................... 35
T

emporary puncture repair kit
......................17

1
Third brake lamp

................................... 1
86, 187
Three flashes function (direction indicators)
................................... 1

41
TMC (Traffic info)

..........................................26

8
To o l s
................

..............................................175
Total distance recorder

...................................32
T

ouch screen audio- CD system
...................28

9
Touch screen audio-telematic system

..........24

9
To w b a r
................

...........................................201
Towed loads

...........................2

20-225, 227-232
T
S
Radio ............................................ 275, 300, 301
Range ................ ........................................32, 35
RCA sockets

.......................... 9
4, 278, 304, 328
R
dS ................

............................................... 302
Rear foglamp ......................................... 129, 186
Rear screen (demisting)
.................................. 89
R

echarging the battery
.................................19

4
Recirculation / exterior air intake

....................84
R

egeneration of the particle
emissions filter
............................................ 2

17
Remote control

.......................................... 5

2- 61
Removing a wheel

..............................
..........17 7
Removing the mat

...............................
............91
Repair kit, puncture

....................................... 17

1
Replacing bulbs
..............................

.......182-187
Replacing fuses
..............................

.......18 8 -19 3
Replacing the air filter

...................................2

16
Replacing the oil filter

................................... 2

16
Replacing the passenger
compartment filter

...................................... 2

16
Replacing wiper blades................................. 197
Rev counter
..................................................... 12
R

eversing camera
...............................
..........126
R
Passenger compartment filter ...................... 2 16
Player, CD MP3 ............................ 2 76, 303, 325
Port, US
b


............................... 9
4, 278, 304, 328
Priming the fuel system

................................2

12
Protecting children

................. 1
49, 151, 155 -170
Puncture
................

................................ 171, 175
alphabetical index