citroen c4 grand picasso 2015 ex+ 2.0 warning fault

[c4 grand picasso]

Hi everyone I'm new to this forum,
i have a citroen c4 grand picasso 2015 ex+ 2.0 bluehdi, recently the car show an orange fault when i start it in the morning( it does show every tim) <engine fault have the vehicle repaired with flashing eco in orange colour. after that it doesn't show for rest of the day.
the eco mode doesn't work when i stop rather it flashes green three times everytime i stop, the battery test shows very good.
any ideas
thank you

[Hell Razor5543]

Hi, and to the Forum.

You will need to get the car diagnosed before you do anything further. There could be a whole number of things that could cause this, and without a proper diagnostics it would be impossible to say WHAT the cause of the problem is. A dealership could run a diagnostics for you, but this will cost, and I do not know how much. A generic code reader will probably not work (as the PSA group use proprietary codes), but there are Forum members who have Lexia/DiagBpx clones that can read PSA vehicles, and some of these members may be able to help you with a diagnostics session. The following link shows you who these members are (but some may no longer respond);

viewtopic.php?t=56452

[c4 grand picasso]

Hi, thank you for the reply
i have taken the car to citroen dealer for diagnosis and this is what they say: Carried out checks into engine warning, found faults related to central voltage maintaining device. Need to carry out checks to all earths, batter &amp; connections. If all ok advise softwear download &amp; recheck for further faults. If still present will require a cnentral voltage maintaining ecu.
in my point of view the fault seems not too serious as it shows only when the car is cold.

[GiveMeABreak]

What Citroen have stated is correct. There will probably be a specific fault code pointing the Central Voltage Maintaining Device. There is a technical service bulletin for this issue that I have briefly mentioned in my post here:

viewtopic.php?p=671560#p671560