Open bonnet and remove positive battery clamp, fuse box cover, fuse panel cover, fuse panel (lay over to one side) and battery cover. Remove air hose to airbox. Unclamp negative battery clamp. Undo M6 battery retaining bolt and remove clamp. Remove battery.
i have a similar problem on my citroen c4 picasso 2015. It was showing me an electrical fault when starting. After a few days the battery died. After charging, everything is ok no massage. I go to the service center, they say the fault is BPGA2010. More specifically, B1624 73 (Central power switch plus relay status error).
A) If applicable, now undertake any work or operations you are planning that needs the battery disconnected, OR: B) If just resetting the BSI, wait 5 minutes whilst the negative terminal is disconnected. Reconnection: Ensure all doors and tailgate are shut (if you have been doing any work on the car). For Keyless Ignition / Stop Start Vehicles
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