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Practical information -> Checks for Your Citroen C4 SUV Third Generation (2020-2025)

Practical information  
AdBlue® (BlueHDi)  
12 V battery  
Air filter  
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An alert is triggered when the reserve level is  
reached.  
The battery does not require any  
Depending on the environment and the  
use of the vehicle (e.g. dusty atmosphere,  
city driving), change it twice as often, if  
necessary.  
maintenance.  
For more information on the Indicators and in  
particular the AdBlue range indicators, refer to  
the corresponding section.  
Check regularly that the terminals are correctly  
tightened (versions without quick-release  
terminals) and that the connections are clean.  
Oil filter  
To avoid the vehicle being immobilised in  
accordance with regulations, you must top up the  
AdBlue tank.  
For more information on AdBlue® (BlueHDi),  
and in particular the supply of AdBlue, refer to  
the corresponding section.  
For more information on the precautions  
to take before any work on the 12 V  
battery, refer to the corresponding section.  
Change the oil filter each time the engine  
oil is changed.  
Particle filter (Diesel)  
Versions equipped with Stop & Start are  
fitted with a 12 V lead-acid battery of  
specific technology and specification.  
Its replacement should be carried out only by  
a CITROËN dealer or a qualified workshop.  
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The start of clogging of the  
particle filter is indicated by the  
temporary lighting of this warning lamp,  
accompanied by an alert message.  
Checks  
Unless otherwise indicated, check these  
components in accordance with the  
Manufacturer's service schedule and according  
to your engine.  
As soon as traffic conditions allow, regenerate  
the filter by driving at a speed of at least 37 mph  
(60 km/h), with an engine speed above 2,500  
rpm, for about 15 minutes (until the warning lamp  
goes out).  
If it is not possible to reach 37 mph (60 km/h),  
leave the engine running at idle for about 15  
minutes, then drive with an engine speed above  
2,500 rpm for 15 minutes.  
Passenger compartment  
filter  
Depending on the environment and the  
use of the vehicle (e.g. dusty atmosphere,  
city driving), change it twice as often, if  
necessary.  
Otherwise, have them checked by a CITROËN  
dealer or a qualified workshop.  
Only use products recommended by  
CITROËN or products of equivalent  
quality and specification.  
In order to optimise the operation of  
components as important as those in the  
braking system, CITROËN selects and offers  
very specific products.  
A clogged passenger compartment filter  
can adversely affect air conditioning  
system performance and generate  
undesirable odours.  
Do not switch off the engine until the filter  
is fully regenerated; repeated intervals  
can degrade the engine oil prematurely.  
Regenerating the filter while the vehicle is  
stationary is not recommended.  
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Practical information  
Following prolonged operation of the  
vehicle at very low speed or at idle, you  
may, in exceptional circumstances, notice  
water vapour coming from the exhaust while  
accelerating. These emissions have no  
impact on the vehicle’s behaviour and the  
environment.  
Electric parking brake  
Wheels and tyres  
The inflation pressure of all tyres,  
including the spare wheel, must be  
checked on "cold” tyres.  
The pressures indicated on the tyre pressure  
label are valid for "cold" tyres. If you have driven  
for more than 10 minutes or more than 6 miles  
(10 kilometres) at over 31 mph (50 km/h), add  
0.3 bar (30 kPa) to the values indicated on the  
label.  
This system does not require any routine  
servicing. However, in the event of a  
problem, do not hesitate to have the system  
checked by a CITROËN dealer or a qualified  
workshop.  
For more information on the Electric  
parking brake, refer to the  
corresponding section.  
New vehicle  
During the first few particle filter  
regeneration operations, you may notice a  
"burning" smell. This is perfectly normal.  
Under-inflation increases energy  
consumption. Non-compliant tyre  
Brake pads  
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 circuit, a drop in the  
brake fluid level indicates that the brake pads  
are worn.  
pressures cause tyres to wear prematurely  
and have an adverse effect on the vehicle's  
road holding - risk of accident!  
Manual gearbox  
The gearbox does not require any  
maintenance (no oil change).  
Driving with worn or damaged tyres reduces the  
braking and road holding performance of the  
vehicle. Regularly check the condition of the  
tyres (tread and sidewalls) and rims as well as  
the presence of the valve caps.  
Automatic gearbox  
The gearbox does not require any  
maintenance (no oil change).  
After washing the vehicle, moisture, or in  
wintry conditions, ice can form on the  
brake discs and pads: braking efficiency may  
be reduced. Gently dab the brakes to dry and  
defrost them.  
When the wear indicators no longer appear set  
back from the tread, the depth of the grooves is  
less than 1.6 mm; replace the tyres as soon as  
possible.  
Using different size wheels and tyres from those  
specified can affect the lifetime of tyres, wheel  
rotation, ground clearance, the speedometer  
reading and have an adverse effect on road  
holding.  
Drive selector  
The drive selector does not require any  
maintenance.  
Manual parking brake  
If you notice excessive brake lever travel  
or decreased effectiveness, the parking  
brake must be adjusted, even between two  
services.  
Brake disc/drum wear  
For any information on checking brake  
disc/drum wear, contact a CITROËN  
dealer or a qualified workshop.  
Fitting different tyres on the front and rear axles  
can cause the ESC to mistime.  
This system must be checked by a CITROËN  
dealer or a qualified workshop.  
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Practical information  
the Euro 6 standard and the vehicle starts  
Always 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  
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.  
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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.  
identified by this symbol on their  
sidewalls.  
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.  
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.  
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.  
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.  
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.  
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.  
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.  
For more information on the Warning  
and indicator lamps and the associated  
alerts, or the Indicators, please refer to the  
corresponding sections.  
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.  
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  
AdBlue® (BlueHDi)  
To respect the environment and ensure  
compliance with the Euro 6 standard, without  
adversely affecting the performance or fuel  
– Never dilute AdBlue® with water.  
You can obtain AdBlue® from a CITROËN dealer  
or a qualified workshop, as well as service  
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