2004 Peugeot 307 message on dash boot mechnism not locked

" hi there
the problem with your boot lock is caused by
1-- the boot release handle lever stuck in
2-- the boot release handle micro switch full of water
the boot is lock is released by the release lever pushing on the micro switch which tells the BSI to unlock the boot catch.the micro switch is in the boot handle,this can be removed by removing the inner tailgate trim then removing the 2 securing nuts on the handle,disconnect the switch wire connector and remove the whole handle.
you can now check if the release lever is stuck,by moving the lever you should be able to hear or feel the micro switch click.
sometimes the little spring tag that returns the lever is broken or cracked causing the lever not to fully return ,causing the problems with the boot not locking,(WD 40 can be used on the lever pivot point to help free it up a bit )if you are happy with the lever operation a new micro switch is required these can be bought from any peugeot dealer "

as this is a convertible it may not be the boot lock at fault but the locking mechanism for the roof.The roof and boot lid position is relayed back to the roof ecu by microswitches situated at various points.best take it to a Peugeot dealer and have it plugged in to their diagnostics.the above procedure is for a hatch back the opening off the boot on a convertible is via the zero

^ better advice , I stupidly mis read the post of 2.0cc as engine size .One of the downfalls of getting old !!!