Citroen C4 2006 - Reprogramming Citroen C4 remote key. The battery was flat in the remote control key to car. A friend took the battery out and told me to get it replaced. Now on enquiring from Halfords, apparently unless the battery is replaced with new one within 10 minuites, all the programme data is wiped off and key will need reprogramming. Joined: Sat Sep 21, 2002 6:07 pm. x 660. Re: New Battery for Grand C4 Picasso. by wheeler » Mon Jul 31, 2023 11:43 am. You need 760 CCA AGM type battery. I would recommend Yuasa brand. On some PSA cars now if you look at the label with the tyre pressures on it it also tells you the type of battery fitted. jJc0lfQ.

citroen c4 grand picasso bsi reset