Tailgate opening

[climo22]

Hi all I have a c4 grand picasso exclusive 1.6 diesel 2016
I have a random problem every now and then when I press key fob to open boot from looked the boot pops and doesn't power open
Also if I unlock the doors they open and the power folding mirrors don't come out and boot don't open as above when I get in and start I get a warning tone and message saying fog light fault and service light on if I turn on headlights and fog lights the service light goes of could this be to do with battery change thanks for any help

[GiveMeABreak]

Try this first:

BSI Reset / Battery Disconnect / Reconnect Procedure

[climo22]

I'll try that thanks marc