2011 Citroen C4 check engine

10
CHECKS
179
CHECKING LEVELS
Check all of these levels regularly and
top them up if necessary, unless other-
wise indicated.
If a level drops signifi cantly, have the corre-
sponding system checked by a CITROËN
dealer or a qualifi ed workshop.

When working under the bon-
net, take care, as certain areas
of the engine may be extremely
hot (risk of burns).

The reading will only be correct if
the vehicle is on level ground and
the engine has been off for more
than 30 minutes.
The check is carried out either when the igni-
tion is switched on using the oil level indicator
in the instrument panel, or using the dipstick.

Oil level


Engine oil change
Refer to the Maintenance and Warranty
Guide for the interval for this operation.
In order to maintain the reliability of the
engine and emission control system,
the use of additives in the engine oil is
prohibited.

Oil specifi cation
The oil must correspond to your engine
and conform to the manufacturer's rec-
ommendations.



Brake fluid level

The brake fl uid level should be
close to the "MAX" mark. If it is
not, check the brake pad wear.

Changing the fl uid
Refer to the Maintenance and Warranty
Guide for the interval for this operation.

Fluid specifi cation
The brake fl uid must conform to the
manufacturer's recommendations and
meet the DOT4 standard.



Power steering fluid level

The power steering fl uid level
should be close to the "MAX"
mark. Unscrew the cap, with
the engine cold, to check the
level.
Coolant level

The coolant level should be
close to the "MAX" mark but
should never exceed it.
When the engine is warm, the
temperature of the coolant is regulated
by the fan. This can operate with the igni-
tion off.

On vehicles which are fi tted with a par-
ticle emission fi lter, the fan may oper-
ate after the vehicle has been switched
off, even if the engine is cold.

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 pres-
sure to drop. When the pressure has
dropped, remove the cap and top up
the level.

Changing the coolant
The coolant does not have to be
changed.

Coolant specifi cation
The coolant must conform to the manu-
facturer's recommendations.

10
CHECKS
180
Used products
Avoid prolonged contact of used
oil or fl uids with the skin.
Most of these fl uids are harmful
to health or indeed very corro-
sive.
Do not discard used oil or fl uids
into sewers or onto the ground.
Take used oil to a CITROËN
dealer or a qualifi ed workshop
(France) or to an authorised
waste disposal site.
Additive level (Diesel with particle emissions filter)

According to your version of instrument
panel, the additive reservoir low level is
indicated by:

Topping up
The reservoir must be topped up with-
out delay by a CITROËN dealer or a
qualifi ed workshop.


- fi xed illumination of the par-
ticle emissions fi lter warning
lamp, accompanied by an au-
dible signal and a message
that the particle emissions fi l-
ter additive level is too low,

- fi xed illumination of the
service warning lamp, ac-
companied by an audible
signal and a message that
the particle emissions fi lter additive level is too low. or

Screenwash/headlamp washlevel

Specifi cation of the fl uid
To ensure optimum cleaning and to
avoid freezing, the fl uid should never be
topped up or replaced by plain water.


To check the level or top up the
fl uid on vehicle fi tted with head-
lamp washers, immobilise the
vehicle and switch of the engine.


)
Open the bonnet and secure it with
the stay.

)
Open the screenwash reservoir fi ller
cap.

)
Take and pinch the level gauge to
block its breather.

)
Remove the gauge completely from
the reservoir to read the level in the
transparent section.

)
Top up if necessary.

)
Refi t the fi ller cap to the reservoir
and close the bonnet.

10
CHECKS
181
CHECKS
Unless otherwise indicated, check
these components in accordance with
the Maintenance and Warranty Guide
and according to your engine.
Otherwise, have them checked by a
CITROËN dealer or a qualifi ed workshop.


Battery

The battery does not require
any maintenance.

However, check that the ter-
minals are clean and correctly
tightened, particularly in sum-
mer and winter.
When carrying out work on the battery,
refer to the "Practical information" sec-
tion for details of the precautions to be
taken before disconnecting the battery
and following its reconnection.


Air filter and passenger compartment filter

Refer to the Maintenance and
Warranty Guide for details of
the replacement intervals for
these components.

Oil filter

Replace the oil fi lter each time
the engine oil is changed.
Refer to the Maintenance and
Warranty Guide for details of
the replacement interval for
this component.
Particle emission filter (Diesel)

According to your version of instrument
panel, the start of saturation of the par-
ticle emissions fi lter is indicated by:


- fi xed illumination of the par-
ticle emissions fi lter warning
lamp, accompanied by an au-
dible signal and a message
that there is a risk of blockage
of the particle emissions fi lter,






The presence of this label, in particular
with the Stop & Start system, indicates
the use of a specifi c 12 V lead-acid bat-
tery with special technology and speci-
fi cation, for which the involvement of a
CITROËN dealer or a qualifi ed work-
shop is required when replacing or dis-
connecting the battery.
Failure to observe this recommendation
may shorten the life of the battery.

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
(refer to
the "Engines" section).
A clogged passenger compartment fi l-
ter may have an adverse effect on the
performance of the air conditioning sys-
tem and generate undesirable odours.
As soon as the traffi c conditions per-
mit, regenerate the fi lter by driving at a
speed of at least 40 mph (60 km/h) until
the warning lamp goes off.
If the warning lamp stays on, refer to
the "Additive level" section.
Following prolonged operation
of the vehicle at very low speed
or at idle, you may, in excep-
tional circumstances, notice the
emission of water vapour at the
exhaust on acceleration. This
does not affect the behaviour of
the vehicle or the environment. or

-
temporary illumination of
the service warning lamp,
accompanied by an audible signal and a message that
there is a risk of blockage of
the particle emissions fi lter.

10
CHECKS
182
Manual gearbox
The gearbox does not re-
quire any maintenance (no oil
change).
Refer to the Maintenance and
Warranty Guide for the details
of the level checking interval
for this component.
6-speed electronic gearbox
system
The gearbox does not re-
quire any maintenance (no oil
change).
Refer to the Maintenance and
Warranty Guide for details of
the checking interval for this
component.
Automatic gearbox

The gearbox does not re-
quire any maintenance (no oil
change).
Refer to the Maintenance and
Warranty Guide for details of
the level checking interval for
this component.
Electric parking brake


This system does not require any
routine servicing. However, in
the event of a problem, have the
system checked by a CITROËN
dealer or a qualifi ed workshop.

For more information, see "Driving - Electric parking brake - § Operating faults".
















Brake pads

Brake disc wear

If a loss of effectiveness of this
system is noticed, the parking
brake must be checked, even
between two services.
Checking this system must be
done by a CITROËN dealer or a quali-
fi ed workshop.

















Only use products recommended
by CITROËN or products of equiv-
alent quality and specifi cation.

In order to optimise the opera-
tion of units as important as
the braking system, CITROËN
selects and offers very specifi c
products.
To avoid damaging the electrical
units, the use of a high pressure
washer in the engine compart-
ment is strictly prohibited
.



Manual parking brake

For information on checking
brake disc wear, contact a
CITROËN dealer or a quali-
fi ed workshop. Brake wear depends on the
style of driving, particularly in
the case of vehicles used in
town, over short distances. It
may be necessary to have the
condition of the brakes checked, even
between vehicle services.
Unless there is a leak in the system, a
drop in the brake fl uid level indicates
that the brake pads are worn.

11
PRACTICAL INFORMATION
187

Removing the cartridge




)
Stow the black pipe.

)
Detach the angled base from the
white pipe.

)
Support the compressor vertically.

)

Unscrew the cartridge from the bottom.

)
Connect the compressor's electri-
cal connector to the vehicle's 12 V
socket.

)
Start the vehicle and let the engine
run.

)
Adjust the pressure using the com-
pressor (to infl ate: switch B
in position
"I"
; to defl ate: switch B
in position "O"

and press button C
), according to the
vehicle's tyre pressure label or the ac-
cessory's pressure label.

)
Remove the kit then stow it.


Beware of discharges of fl uid.
The expiry date of the fl uid is in-
dicated on the cartridge.
The sealant cartridge is designed
for single use; even if only partly
used, it must be replaced.
After use, do not discard the car-
tridge into the environment, take
it to an authorised waste dispos-
al site or a CITROËN dealer.
Do not forget to obtain a new
sealant cartridge, available from
CITROËN dealers or from a
qualifi ed workshop.



Checking tyre pressures/
inflating accessories

You can also use the compressor, with-
out injecting any product, to:


- check or adjust the pressure of your
tyres,

- infl ate other accessories (balls, bicycle
tyres...).


)
Turn the selector A
to the
"Air" position.

)
Uncoil the black pipe H
fully.

)
Connect the black pipe to
the valve of the wheel or accessory.
If necessary, fi t one of the adaptors
supplied with the kit fi rst.

11
PRACTICAL INFORMATION
203
Charging the battery using abattery charger
)
Connect one end of the green or
black cable to the negative terminal
(-) of the slave battery B
.

)
Connect the other end of the green
or black cable to the earth point C

on the broken down vehicle.

)
Operate the starter, let the engine run.

)
Wait until the engine returns to idle
and disconnect the cables.

It is advisable to disconnect the bat-
tery if the vehicle is to be left unused
for more than one month. The batteries contain harmful
substances such as sulphuric
acid and lead. They must be
disposed of in accordance with
regulations and must not, in any
circumstances, be discarded
with household waste.
Take used remote control bat-
teries and vehicle batteries to a
special collection point.

)
Connect the red cable to the posi-
tive terminal (+) of the fl at battery A
,
then to the positive terminal (+) of
the slave battery B
.

Starting using another battery


The Stop & Start battery does
not have to be disconnected for
charging.


)

Disconnect the battery from the vehicle.


)
Follow the instructions for use pro-
vided by the manufacturer of the
charger.

)
Reconnect starting with the negative
terminal (-).

)

Check that the terminals and connec-
tors are clean. If they are covered with
sulphate (whitish or greenish deposit),
remove them and clean them.

11
PRACTICAL INFORMATION
208
TOWING A TRAILER,
A CARAVAN, ETC.
We recommend the use of genu-
ine CITROËN towbars and their
harnesses that have been tested
and approved from the design
stage of your vehicle, and that
the fi tting of the towbar is en-
trusted to a CITROËN dealer or
a qualifi ed workshop.
If the trailer is not fi tted by a
CITROËN dealer, it is imperative
that it is fi tted using the vehicle's
electrical pre-equipment, in ac-
cordance with the manufacturer's
instructions. The rear parking sensors will
be deactivated automatically if
a genuine CITROËN towbar is
used.

Towbar suitable for the attachment of a
trailer or caravan with additional lighting
and signalling.
Your vehicle is primarily designed for
transporting people and luggage, but it
may also be used for towing a trailer. Driving with a trailer places greater de-
mands on the towing vehicle and the
driver must take particular care.


Driving advice


Distribution of loads


)
Distribute the load in the trailer so
that the heaviest items are as close
as possible to the axle and the nose
weight approaches the maximum
permitted without exceeding it.
Air density decreases with altitude, thus
reducing engine performance. Above
1 000 metres, the maximum towed load
must be reduced by 10 % for every
1 000 metres of altitude.
Refer to the "Technical Data" section for
details of the weights and towed loads
which apply to your vehicle.

Side wind


)
Take into account the increased
sensitivity to side wind.


Cooling
Towing a trailer on a slope increases
the temperature of the coolant.
As the fan is electrically controlled, its
cooling capacity is not dependent on
the engine speed.


)
To lower the engine speed, reduce
your speed. The maximum towed load on a long in-
cline depends on the gradient and the
ambient temperature.
In all cases, keep a check on the coolant
temperature.


)
If the warning lamp and the
STOP
warning lamp come
on, stop the vehicle and
switch off the engine as
soon as possible.


Braking
Towing a trailer increases the braking
distance.

Tyres


)
Check the tyre pressures of the towing
vehicle and of the trailer, observing the
recommended pressures.


Lighting


)
Check the electrical lighting and sig-
nalling on the trailer.

12
TECHNICAL DATA
222
IDENTIFICATION MARKINGS
Various visible markings for the identifi -
cation of your vehicle.

A. Vehicle identifi cation number
(VIN) under the bonnet.

This number is engraved on the body-
work near the engine mounting.
B. Vehicle identifi cation number on
the dashboard.

This number is indicated on a self-ad-
hesive label which is visible through the
windscreen.
D. Tyre/paint label.

This label is affi xed to the driver's front
pillar.
The tyre pressures must be
checked when the tyres are cold,
at least once a month.
Low tyre pressures increase fuel
consumption.
C. Manufacturer's label.

The VIN is indicated on a self-destroy-
ing label affi xed to the driver's centre
pillar. It bears the following information:


- the tyre pressures, for unladen and
laden conditions,

- the wheel rim and tyre sizes,

- the brands of tyre recommended by
the manufacturer,

- the spare tyre infl ation pressure,

- the paint colour code.
Wheels which are fi tted with
225/40 R18 tyres cannot be fi t-
ted with snow chains. For more
information, contact a CITROËN
dealer or a qualifi ed workshop.