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Driving -> Starting / Switching off the engine with Keyless Entry and Starting for Your Citroen C4 Cactus SUV Second Generation (2018-2024)

Driving  
audible signal, to remind you that the key is  
still in the ignition switch at position 1 (Stop).  
If the key has been left in the ignition switch  
at position 2 (Ignition on), the ignition will be  
switched off automatically after one hour.  
To switch the ignition back on, turn the key  
to position 1 (Stop), then back to position 2  
(Ignition on).  
In some circumstances, a message indicates  
that it is necessary to turn the steering wheel  
while pressing the "START/STOP" button to  
assist unlocking of the steering column.  
Starting  
With petrol engines, after a cold start,  
preheating the catalytic converter can  
cause noticeable engine vibrations for  
anything up to 2 minutes while stationary with  
the engine running (accelerated idle speed).  
Starting / Switching off the  
engine with Keyless Entry  
and Starting  
Switching off  
► With a manual gearbox, place the gear lever  
in neutral and fully depress the clutch pedal.  
► With an automatic gearbox, select mode P  
or N and press the brake pedal.  
► Immobilise the vehicle, with the engine at  
idle.  
► With a manual gearbox, ideally put the gear  
lever into neutral.  
► With an automatic gearbox, ideally select  
mode P or N.  
► Press the "START/STOP" button..  
In some circumstances, it is necessary to turn  
the steering wheel to lock the steering column.  
The electronic key must be present in the  
passenger compartment.  
If it is not detected, a message is displayed.  
Move the electronic key so that the engine  
can be started or switched off.  
If there is still a problem, refer to the "Key  
not detected - Back-up starting or Back-up  
switch-off" section.  
► Press the "START/STOP" button while  
maintaining pressure on the pedal until the  
engine starts.  
For Diesel engines, when the temperature is  
below zero and/or the engine is cold, starting will  
only occur once the preheating warning lamp is  
off.  
If this warning lamp comes on after  
pressing the "START/STOP" button:  
► Keep the pedal fully depressed and do not  
press the "START/STOP" button again until the  
engine is running.  
If the vehicle is not immobilised, the  
engine will not switch off.  
With the engine off, the braking and  
steering assistance systems are also cut  
off - risk of loss of control of the vehicle!  
Never leave your vehicle with the  
electronic key still inside.  
If one of the starting conditions is not met, a  
message is displayed.  
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Driving  
Back-up switch-off  
Switching on the ignition  
without starting the engine  
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► Place and hold the remote control against the  
reader.  
If the electronic key is not detected or is no  
longer in the recognition zone, a message  
appears in the instrument panel when closing a  
door or trying to switch off the engine.  
To confirm the instruction to switch off the  
engine, press the "START/STOP" button for  
approximately 5 seconds.  
In the event of a fault with the electronic key,  
contact a CITROËN dealer or a qualified  
workshop.  
With the electronic key in the passenger  
compartment, pressing the “START/STOP”  
button, without pressing any of the pedals,  
allows the ignition to be switched on without  
starting the engine (turning on the instrument  
panel and accessories such as the audio system  
and the lighting).  
With a manual gearbox, place the gear lever  
in neutral then fully depress the clutch pedal.  
With an automatic gearbox, select mode P,  
then fully depress the brake pedal.  
► Press the “START/STOP” button.  
The engine starts.  
► Press this button again to switch off the  
ignition and allow the vehicle to be locked.  
Key not detected  
Emergency switch-off  
In the event of an emergency only, the engine  
can be switched off without conditions (even  
when driving).  
► Press the "START/STOP" button for about  
5 seconds.  
Back-up starting  
A back-up reader is fitted underneath the  
parking brake lever so that the engine can be  
started if the system does not detect the key  
in the recognition zone, or if the battery in the  
electronic key is flat.  
In this case, the steering column locks as soon  
as the vehicle stops.  
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