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Ready to go -> Tyre under-inflation detection for Your Citroen Relay Van 2014-2024

Instruments and controls  
EMISSIOnS cOntrOLS  
tYrE undEr-InFLAtIOn dEtEctIOn  
EOBD (European On Board Diagnosis) is  
a diagnostics system which complies with,  
among others, the standards on emissions  
limits of:  
This system does not avoid the need  
to check the tyre pressures regularly  
(including the spare wheel) and before a  
long journey.  
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CO (carbon monoxide),  
HC (unburnt hydrocarbons),  
NOx (nitrogen oxides), detected by  
oxygen sensors placed downstream of  
the catalytic converters,  
Driving with under-inflated tyres  
adversely affects road holding, extends  
braking distances and causes premature  
tyre wear, particularly under arduous  
conditions (vehicle loaded, high speed, long  
journey).  
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particles.  
The driver is warned of any  
malfunction of this emissions  
control system by the illumination  
of this warning lamp in the  
instrument panel.  
System which automatically checks the  
pressures of the tyres while driving.  
Driving with under-inflated tyres increases  
fuel consumption.  
The system continuously monitors the  
pressures of the four tyres, as soon as the  
vehicle is moving.  
The tyre pressures must be checked  
when the tyres cold (vehicle stopped  
for 1 hour or after driving for less then  
6 miles (10 km) at moderate speed).  
Otherwise, add 0.3 bar to the values  
indicated on the label.  
If this warning lamp comes on, have it  
checked by a CITROËN dealer or a qualified  
workshop.  
A pressure sensor is located in the valve of  
each tyre.  
The system triggers an alert if a drop in  
pressure is detected in one or more tyres.  
The tyre pressures for your vehicle can be  
found on the tyre pressure label.  
The tyre under-inflation detection  
system is an aid to driving which does  
not replace the need for vigilance on  
the part of the driver.  
To locate it, refer to the "Technical  
data - Identification markings" section.  
Instruments and controls  
under-inflation alert  
Operating fault  
The alert is given by the fixed  
The loss of pressure detected does  
not always lead to visible deformation  
of the tyre.  
The flashing and then fixed  
illumination of this warning lamp  
accompanied by the illumination  
illumination of this warning lamp,  
accompanied by an audible signal,  
and depending on equipment, the  
display of a message.  
of the service warning lamp, and  
Do not rely on just a visual check.  
depending on equipment, the display of a  
message indicates a fault with the system.  
In the event of a problem on one of the  
tyres, the symbol or the message appears,  
according to equipment, to identify it.  
In this case, monitoring of the tyre pressures  
is not assured.  
The alert is maintained until the tyre or  
tyres concerned is reinflated, repaired  
or replaced.  
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Reduce speed, avoid sudden steering  
movements or harsh brake applications.  
This alert is also displayed when one or  
more wheels is not fitted with a sensor.  
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Stop as soon as it is safe to do so.  
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In the event of a puncture, use the  
temporary puncture repair kit or the  
spare wheel (according to equipment).  
Go to a CITROËN dealer or a qualified  
workshop to have the system checked or,  
following the repair of a puncture, to have  
the original wheel, equipped with a sensor,  
refitted.  
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In the event of under-inflation:  
● if you have a compressor, the one  
in the temporary puncture repair  
kit for example, check the four tyre  
pressures when cold,  
or  
● if it is not possible to check the  
tyre pressures at the time, drive  
carefully at reduced speed and go  
to the nearest CITROËN dealer or a  
qualified workshop.  
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