2023 CITROEN C4 fuel filter

8
Eco-driving
Eco-driving
Eco-driving refers to a range of everyday
practices that allow the motorist to optimise
the vehicle's energy consumption (fuel and/or
electricity) and CO
2 emissions.
Optimise your use of the gearbox
With a manual gearbox, move off gently and
change up promptly. While accelerating, change
up early.
With an automatic gearbox, favour automatic
mode. Do not depress the accelerator pedal
heavily or suddenly.
The gear shift indicator prompts you to engage
the most suitable gear. Whenever this indication
is displayed on the instrument panel, follow it
straight away.
With an automatic gearbox, this indicator
appears only in manual mode.
Drive smoothly
Maintain a safe distance between vehicles, use
engine braking rather than the brake pedal and
press the accelerator gradually. These practices
help to save on energy consumption, reduce
CO
2 emissions and decrease general traffic
noise.
When the traffic is flowing smoothly, select the
cruise control.
Control the use of electrical equipment
Before moving off, if the passenger compartment
is too warm, ventilate it by opening the windows
and air vents before using the air conditioning.
At speeds above 31
mph (50 km/h), close the
windows and leave the air vents open.
Consider using equipment that can help keep
the temperature in the passenger compartment
down (e.g.
sunroof blind, window blinds).
Unless automatically regulated, switch off the air
conditioning as soon as the desired temperature
has been reached.
Switch off the demisting and defrosting functions,
if they are not managed automatically.
Switch off the heated seat as soon as possible.
Adapt your use of the headlamps and/or
foglamps to the level of visibility, in accordance
with current legislation in the country in which
you are driving.
Avoid running the engine before moving off,
particularly in winter (other than in severe wintry
conditions: temperature below -23°C). The
vehicle will warm up much faster while driving.
As a passenger, avoid connecting your
multimedia devices (e.g.
film, music, video
game) to help reduce the consumption of energy.
Disconnect all portable devices before leaving
the vehicle.
Limit the causes of excess consumption
Spread loads throughout the vehicle. Place the
heaviest items in the boot as close as possible to
the rear seats. Limit the loads carried in the vehicle and
minimise wind resistance (e.g.
roof bars, roof
rack, bicycle carrier, trailer). Preferably, use a
roof box.
Remove roof bars and roof racks after use.
At the end of winter, remove snow tyres and refit
summer tyres.
Comply with the servicing instructions
Check tyre pressures regularly, with the tyres
cold, referring to the label in the door aperture on
the driver's side.
Carry out this check in particular:
–

before a long journey
.
–

at each change of season.
–


after a long period out of use.
Do not forget the spare wheel and, where
applicable, the tyres on your trailer or caravan.
Have your vehicle serviced regularly (e.g.

engine
oil, oil filter, air filter, passenger compartment
filter, etc.). Observe the schedule of operations in
the manufacturer's service schedule.
With a BlueHDi Diesel engine, if the SCR system
has a fault, your vehicle will emit pollution. Visit
a CITROËN dealer or a qualified workshop
as soon as possible to restore your vehicle's
nitrogen oxide emissions to legal levels.
When filling the fuel tank, do not continue after
the third cut-out of the nozzle, to avoid overflow.
You will only see the fuel consumption of your
new vehicle settle down to a consistent average
after the first 1,900 miles (3,000 kilometres).

16
Dashboard instruments
Engine self-diagnostics system (Petrol or
Diesel)
Fixed.
A minor engine fault has been
detected.
Carry out (3).
Dynamic stability control (DSC)/Anti-slip
regulation (ASR)
Flashing.
DSC/ASR system regulation is activated
in the event of a loss of grip or trajectory.
Fixed.
The DSC/ASR system has a fault.
Carry out (3).
Emergency brake malfunction (with
electric parking brake)
Fixed, accompanied by the
message "Parking brake fault".
Emergency braking does not deliver optimal
performance.
If automatic release is not available, use manual
release or carry out (3).
Hill start assistFixed, accompanied by the
message "Anti roll-back system
fault".
The system has a fault.
Carry out (3).
Dynamic stability control (DSC)/Anti-slip
regulation (ASR)
Fixed.
The system is deactivated. The DSC/ASR system is reactivated
automatically when the vehicle is started, and at
speeds above approximately 31 mph (50
km/h).
At speeds below 31 mph (50 km/h), it can be
reactivated manually.
Under-inflationFixed.
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).
Engine preheating (Diesel)Temporarily 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.
Particle filter (Diesel)Fixed, accompanied by an audible signal
and a message about the risk of particle
filter blockage.
The particle filter is nearing saturation.
As soon as 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.
Diesel fuel filter (Diesel)Fixed.
The Diesel fuel filter contains water.
Carry out (2) without delay. Risk of damaging the
fuel injection system!
AirbagsFixed, associated with the Service
warning lamp and accompanied by
the display of a message.
One of the airbags or seat belt pyrotechnic
pretensioners is faulty.
Carry out (3).
Front passenger airbag (ON)Fixed.
The front passenger airbag is activated.
The control is set to the "ON" position.
In this case, do not install a "rearward facing"
child seat on the front passenger seat - risk
of serious injury!

19
Dashboard instruments
1Flashing temporarily.
STOP mode is momentarily unavailable
or START mode is automatically triggered.
For more information, refer to the Driving
section.
Vehicle ready to drive (Electric)Fixed, accompanied by an audible signal
when it comes on.
The vehicle is ready to drive and the thermal
comfort systems are available.
The indicator lamp goes out upon reaching a
speed of approximately 3 mph (5
km/h) and
lights up again when the vehicle stops moving.
The lamp will go out when you switch off the
motor and exit the vehicle.
Seat occupied/Seat belt fastenedFixed.
With the ignition on, the driver or a
passenger has fastened their seat belt.
Park AssistFixed.
The function is active.
For more information, refer to the Driving
section.
Lane positioning assistFixed.
The function has been activated.
All conditions have been met: the system is
operating.
For more information, refer to the Driving
section.
Direction indicatorsFlashing with audible signal.
The direction indicators are on.
SidelampsFixed.
The lamps are on.
Dipped beam headlampsFixed.
The lamps are on.
Automatic headlamp dippingFixed.
The function has been activated
via the touch screen.
The lighting control stalk ring is in the “ AUTO”
position.
For more information, refer to the Lighting and
visibility section.
Front foglampsFixed.
The front foglamps are on.
Blue warning/indicator lamps
Main beam headlamps
Fixed.
The lamps are on.
Black/white warning lamps
Foot on the clutch (Petrol or Diesel)
Fixed.
Stop & Start: the change to START mode
is rejected because the clutch pedal is not fully
depressed. Fully depress the clutch pedal.
Foot on the brakeFixed.
Insufficient or no pressure on the brake
pedal.
Fuel filter (Diesel)Fixed.
The Diesel fuel filter contains water.
Carry out (2) without delay. Risk of damaging the
fuel injection system!
Indicators
Service indicator
The servicing information is expressed in terms
of distance (miles or kilometres) 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.

170
Practical information
Opening
► Open the left-hand front door.



► Pull the interior release lever , located at the
bottom of the door frame, towards you.


► Lift the exterior safety catch and raise the
bonnet.
►

Unclip the stay from its housing and place it
in the support slot to hold the bonnet open.
Closing
► Hold the bonnet and pull out the stay from the
support slot.
► Clip the stay in its housing.
► Lower the bonnet and release it near the end
of its travel.
►

Pull on the bonnet to check that it is locked
correctly

.
Because of the presence of electrical
equipment under the bonnet, it is strongly
recommended that exposure to water (rain,
washing, etc.) be limited.
Engine compartment
The engine shown here is an example for
illustrative purposes only.
The locations of the following elements may
vary:
–

Air filter
.
–

Engine oil dipstick.
–


Engine oil filler cap.
Petrol engine

Diesel engine

1. Screenwash fluid reservoir
2. Engine coolant reservoir
3. Brake fluid reservoir
4. Battery/Fuses
5. Fusebox
6. Air filter
7. Engine oil filler cap
8. Engine oil dipstick
Diesel fuel system
This system is under very high pressure.
All work must be carried out only by a
CITROËN dealer or a qualified workshop

175
Practical information
7Always mark the direction of rotation on the tyres
that will be stored when fitting winter or summer
tyres. Store them in a cool, dry place and away
from direct exposure to the sun's rays.
Winter or 4-seasons tyres can be
identified by this symbol on their
sidewalls.
Shock absorbers
It is not easy for drivers to detect when
shock absorbers are worn. Nevertheless,
the shock absorbers have a major impact on
road holding and braking performance.
For your safety and driving comfort, it is
important to have them regularly checked by a
CITROËN dealer or a qualified workshop.
Timing and accessory kits
The timing and accessory kits are used
from the time the engine is started until it
is switched off. It is normal for them to wear over
time.
A
faulty timing or accessory kit can damage
the engine, rendering it unusable. Observe the
recommended replacement frequency, stated in
distance travelled or time elapsed, whichever is
reached first.
AdBlue® (BlueHDi)
To respect the environment and ensure compliance with the Euro 6 standard, without
adversely affecting the performance 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.
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 15 litres.
Its capacity allows a driving range of
approximately 4,000
miles (6,500 km),
which
may vary considerably depending on your
driving style.
An alert system is triggered once the reserve
level is reached: it is then possible to drive for a
further 1,500 miles (2,400

km) before the tank is
empty and the vehicle is immobilised.
For more information on the Warning
and indicator lamps and the associated
alerts, or the Indicators, please refer to the
corresponding sections.
Once the AdBlue® tank is empty, a device
required by law prevents the engine from
being restarted.
If the SCR system is faulty, the level of
emissions from the vehicle will no longer meet
the Euro 6 standard and the vehicle starts
polluting the environment.
In the event of a confirmed SCR system
malfunction, it is essential to visit a CITROËN
dealer or a qualified workshop. After 685
miles (1,100 km), a device is automatically
activated to prevent the engine from starting.
In both cases, a range indicator indicates
the distance that can be travelled before the
vehicle is stopped.
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 reserve level has been reached.
For the correct operation of the SCR
system:
–

Use
only AdBlue
® fluid that meets the ISO
22241 standard.
–

Never

transfer AdBlue
® to another container
as it would lose its purity.
–

Never

dilute AdBlue
® with water.
You can obtain AdBlue
® from a CITROËN dealer
or a qualified workshop, as well as service

273
Alphabetical index
E
EBFD 77
Eco-driving (advice)
8
ECO mode

105
Electric windows

42
Electronic brake force distribution (EBFD)

77
Emergency braking assistance (EBA)

78
Emergency call

75–76
Emergency switching off

97–98
Emergency warning lamps

74, 180
Emissions control system, SCR

22, 175
Energy economy (mode)

168
Energy economy mode

168
Energy flows

23, 28, 30
Energy recovery

23, 104
Engine

175
Engine compartment

170
Engine, Diesel

152, 170, 180, 200
Engine, petrol

170, 198
Engines

197–198, 200
Environment

8, 38, 94
ESC (electronic stability control)

77
Expanded traffic sign recognition

11 4
Exterior lighting

68
F
Fatigue detection 136–137
Favourite driving functions
111
Filling the AdBlue® tank

173, 176
Filling the fuel tank 152–153
Filter, air
173
Filter, oil

173
Filter, particle

173
Filter, passenger compartment

51, 173
Fitting a wheel

185–186
Fitting roof bars

167–168
Fittings, boot

63
Fittings, interior

59
Flap, fuel filler

152–153
Flashing indicators

66, 188
Floor, boot, adjustable

63
Fluid, brake

172
Fluid, engine coolant

172
Foglamp, rear

65, 190
Foglamps, front

65, 70, 189
Foglamps, rear

191
Folding the rear seats

49–50
Frequency (radio)

241, 263
Fuel

8, 152
Fuel consumption

8
Fuel level, low

152
Fuel (tank)

152–153
Fuses

191
G
Gauge, fuel 152
Gearbox, automatic
101–103, 105, 174, 192
Gearbox, manual

101, 105, 174
Gear lever, manual gearbox

101
Gear shift indicator 106
Glove box
59
G.P.S.

235
H
Hazard warning lamps 74, 180
Headlamps (adjustment)
67
Headlamps, automatic dipping

69–70
Headlamps, automatic operation

67
Headlamps, dipped beam

188
Headlamps, halogen

67, 188
Headlamps, main beam

69, 188
Head restraints, front

45
Head restraints, rear

49–50
Head-up display

12
Heated steering wheel

47
Heating

51–52
Heating, programmable

30, 58
Hi-Fi system

61
High voltage

153
Highway Driver Assist

11 8
Hill start assist

105–106
Histogramme, fuel consumption

29–30
Horn

75
I
Ignition 97, 245, 265
Ignition on
97

275
Alphabetical index
N
Navigation 233–235
Navigation, connected
236–238
O
Obstacle detection 137
Oil change
171
Oil consumption

171
Oil, engine

171
On-board tools

64, 180–181
Opening the bonnet

169–170
Opening the boot

33, 35, 40
Opening the doors

35, 39
P
Pads, brake 174
Paint
178, 202
Paint colour code

202
Park Assist

146
Parking brake

98, 174
Parking brake, electric

99–101, 174
Parking (sensors)

137
Parking sensors, audible and visual

137
Parking sensors, front

138
Parking sensors, rear

137
Parking sensors, side

138
Passenger compartment temperature pre-
conditioning (Electric)
30, 58
Pedestrian horn (Electric)

75, 94
Personalisation

11
Plates, identification

202
Player, Apple®

208, 218, 243
Player, USB

207, 217, 242
Port, USB

60, 207, 217, 220, 238, 242
Post Collision Safety Brake

78
Power

23
Power indicator (Electric)

9, 23
Pressures, tyres

174, 182, 203
Pre-tensioning (seat belts)

81
Priming the fuel system

180
Profiles

247, 253
Protecting children

83–89
Proximity Keyless Entry and Start

34
Public fast charging station

156, 162
Puncture

181–182, 184
R
Radar (warnings) 11 0
Radio
206–207, 215–216, 241, 262–263
Radio, digital (Digital Audio Broadcasting -
DAB)

207, 217, 242
Range, AdBlue®

21, 173
RDS

206, 216, 241
Reading lamps

62–63
Rear bench seat

49
Rear screen (demisting)

58
Rechargeable hybrid engine 30
Rechargeable hybrid system
30
Recharging the battery

191, 193
Recharging the traction battery
(Electric)

153, 157, 160, 162–163
Recirculation, air

57
Recorder, trip distance

25
Reduction of electrical load (mode)

169
Regeneration of the particle filter

173
Regenerative braking (deceleration by
engine braking)

103–104
Reinitialising the remote control

39
Reinitialising the under-inflation detection
system

109
Reminder, key in ignition

96
Reminder, lighting on

65–66
Remote control

32–37
Remotely operable functions
(Electric)

30, 58, 163
Removing a wheel

185–186
Removing the mat

62
Replacing bulbs

187–189
Replacing fuses

191
Replacing the air filter

173
Replacing the oil filter

173
Replacing the passenger compartment
filter

173
Reservoir, screenwash

172
Resetting the trip

26
Retractable support

60
Rev counter

10
Reversing camera

110, 139–141, 143–145

276
Alphabetical index
Reversing lamps 189, 191
Roof bars
167–168
Roof, opening

43–44
Running out of fuel (Diesel)

180
S
Safety, children 83–89
Saturation of the particle filter (Diesel)
173
Screenwash

71
Screenwash, front

71
SCR (Selective Catalytic Reduction)

22, 175
Seat angle

46
Seat belts

79–81, 87
Seat belts, rear

80
Seats, electric

46
Seats, front

45–46
Seats, heated

47, 50–51
Seats, rear

49–50, 85
Selector, gear

101, 103
Sensors (warnings)

11 0
Serial number, vehicle

202
Servicing

19, 173, 175
Settings, equipment

11, 28–29
Settings, system

210, 223, 247
Sidelamps

66, 188–189
Silent vehicle warning sound (Electric)

75, 94
Smartphone

31, 60
Snow chains

108, 168
Socket, 12 V accessory

60
Socket, auxiliary

207, 242
Socket, Jack

242
Speakers 61
Speed limiter
113–116
Speed limit recognition

111 , 11 3
Speedometer

10, 111
Sport mode

105
Spotlamps, side

68
Stability control (ESC)

77
Starting a Diesel engine

152
Starting the engine

95, 98
Starting the vehicle

95–96, 103
Starting using another battery

97, 192
Station, radio

206, 215–216, 241, 262–263
Stay, engine bonnet

170
Steering mounted controls,
audio

204, 214, 228
Steering wheel (adjustment)

47
Stickers, customising

178
Stopping the vehicle

95–97, 103
Stop & Start

26, 52, 57, 106–107, 152, 169, 173, 194
Storage

59
Storage box

64
Storage wells

64
Sunshine sensor

51
Sun visor

59
Super-fast charging (Electric)

162–163, 201
Suspension

175
Switch, ignition

95–96
Switching off the engine

95, 98
Synchronising the remote control

39T
Tables of engines 201
Tank, fuel
152–153
Technical data

198, 200–201
Telephone

208–210, 218–220, 244–246, 260–261, 264–265
Temperature, coolant

21
Thermal comfort consumption indicator
(Electric)

24
Thermal comfort equipment

24
Time (setting)

210, 223, 248, 266
TMC (Traffic info)

235
Tool box

64
Tools

180–181
Topping-up AdBlue®

176
Top Rear Vision

140, 143
Top Tether (fixing)

87, 90–91
Total distance recorder

25
Touch screen

27–30, 58
Touch screen tablet

27, 60
Towball, quickly detachable

165–167
Towbar

164
Towbar with quickly detachable
towball

165–167
Towed loads

197–198, 200
Towing

194, 196
Towing another vehicle

194, 196
Towing the vehicle

194, 196
Traction battery (Electric)

23, 28, 30,
153, 155, 201
Traction control (ASR)

78
Traffic information (TMC)

235
Trailer

164