Problem with central locking on back door only 2.0hdi

[Stevie berlingo lad]

hi again guys I'm back once again (LOL) 

My problem is a new 1 for me 

Bought we multispace 2004 model (( second hand )) months ago and all has been good all doors locked by the key fob ,,, 

Just noticed when I went outside to get something out of my boot it was open (wasn't locked)didn't think anything off it , I thought I mustn't of locked my van after getting out last night  , closed it and went to get into drivers door it was locked ,( I thought what the heck ) so hit the key fob to open all doors then hit again to lock all doors and found my boot isn't locking and all other doors do ,,, 

Does anybody know what could be the problem ? And is it an easy fix ??

Many thanks in advance

[polar]

Common problem - gain access to the lock and spray well with WD or something like that

[Stevie berlingo lad]

Common problem - gain access to the lock and spray well with WD or something like that

Just noticed today it's back to normal , Its fixed its self lol 

Gonna try your method maybe it's sticking , good man

[Top drive]

i had a bit of hassle with this.

my tail gate door wasnt shutting fully unless slammed .

Inturn this meant the lock didnt engage.

So as above i got on the hi pen spray and went at it .

problem solved.