2008 Citroen C4 check engine

122
X
M A I N T E N A N C E
Protection cover
HDi 135 and 140 engines
Remove the protection cover by fi rst unclipping point 1, then 3 and4. Detach point 2 by pulling towards you, then lift.
To reposition the protection cover, attach point 2 fi rst. Lower the cover, keeping it centred. Clip points 1 and4, pushing vertically and slightly rearwards. Clip point 3 pushing down vertically.
HDi engines are of a highly technical nature.
All maintenance and repairs require specifi c qualifi cations which only your CITROËN Dealer can guarantee.All maintenance and repairs require specifi c qualifi cations All maintenance and repairs require specifi c qualifi cations
Bleeding of water from the diesel fuel fi lter
To be bled on a regular basis (at every oil change).
To evacuate the water, slacken the bleed screw or the water in diesel fuel sensor, which is located at the base of the fi lter, until water ceases to fl ow out.
Then retighten the bleed screw or the water in diesel fuel sensor.
DIESEL INJECTION EQUIPMENTWear of brake discs, brake pads and brake drums
The rate of wear of the brake pads depends on the use of your vehicle (urban use, frequent stops), and on your style of driving or the type of journey.
For information on checking the discs and drums for wear, contact a CITROËN dealer.
After washing the vehicle, brake progressively to dry out the brake linings.

179
XIII
A U D I O
QUESTIONANSWERSOLUTION
The pre-set stations do not work (no sound, 87.5 Mhz is displayed, etc.).
The waveband selected is not the correct one.Press on the button BAND AST to retrieve the wave band (AM, FM1, FM2, FMAST) where the stations have been memorised.
Traffi c Announcements (TA) is displayed, but I do not receive any road information.
The particular radio station is not in the regional traffi c information network.Change to a radio station which does broadcast traffi c information.
The reception quality of the radio station being listened to gradually deteriorates or the pre-set stations do not work (no sound, 87.5 Mhz displayed, etc.).
The vehicle is too distant from the transmitter of the station being listened to, or no transmitter is present in the geographical area you are passing through.
Activate the RDS function to allow the system to check whether a more powerful transmitter is to be found in the geographical area.
The environment (hills, high buildings, tunnels, underground car parks, etc.) is blocking reception, even in RDS mode.
This phenomenon is normal and does not imply anything wrong with the radio.
The aerial is absent or has been damaged (for example after going through a car wash or in an underground car park).
Have the aerial checked by a CITROËN dealer.Have the aerial checked by a Have the aerial checked by a
Cutting of sound for 1 or 2 seconds in radio mode.
The RDS system during this brief sound cut-off is searching for a better frequency that might offer improved reception of the station.
Deactivate the RDS function if the phenomenon occurs too frequently and always on the same journey.
When the engine is not running, the radio stops after a few minutes.
When the engine is switched off, the working time for the radio depends on the vehicle n the engine is switched off, the working n the engine is switched of
battery charge.
The interruption is normal: the radio goes into economy mode, cutting off in order to save the erruption is normal: the radio goes into erruption is normal: the radio goes into
vehicle’s battery.
You have to start the engine so as to increase the battery charge.
The message "the audio system is overheating" appears on the screen.
In order to protect the audio equipment in excessive ambient temperatures, the radio goes into an automatic thermic protection mode which results in a reduction in sound volume or stopping of the CD player.
Switch off the audio system for a few minutes in order to allow the system to cool down.