Boot wont lock

Various ideas here including a reset. These roofs can be problematic especially as your boot is full of roof, it is unlikely you can get the emergency release! Having the boot lock broken is particularly bad, and at times like this, I bet you wish you had fixed it. My friend has one. An auto locksmith might he able to open the lock.

https://www.google.com/search?q=get+in+the+boot+of+a+Peugeot+206cc+convertible+when+the+roof+is+down

https://www.google.com/search?q=auto+locksmith+near+me

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Adjustment with a gentle tap from a 7lb hammer may knock it back to allignment.

Can you give a check to the micro switch that is connected to your boot lock?
If the catch gets stuck, open your drivers door, leave it open,reach across & press down the lock on the passenger front side. The locks will lock/ unlock themselves, because they sense a door is open. Repeat this action until you hear the boot unlock. Also, keep your battery well-charged.
Let us know if this helps!!

found I had to drill a 6mm hole through the plastic downwards at the top edge an inch away from the outer end of the lower tailgate (over the offending catch) insert a rod or screwdriver 2 too 3 inches down then delicatlely feel for the spring loaded catch , this will release the boot lid and you can undo all screws and fastenings to get at the mechanism

Have you tried to disconnect battery terminal and wait for 5 minutes before connecting again to check the remote locking?

central locking isnot working because the boot cant lock change the boot sensor wswitch then central locking will work all good

The latch may be stuck in the "open postion" you might try spraying some WD-40 on the latch. Try working the handle a couple times.

Sounds like the rod that goes from the lock to the key came off. There is usually a little plastic clip that holds it together and they break and you get what you are experiencing. You have to take the inside panel off of the door to get inside it.

You can spray solvent into the lock...Do it several times and use the nozzle extension to really get in there. If that does not work, you will need to remove rear seat and use long extensions to unbolt lock from lid.

what year is the car pet or diesel