Picasso Intermittent Passenger Door Central Locking Issue

Hi All

I have been searching to see what could be causing an issue with my central locking. So far not been able to see anything that relates.

Issue I have on a Picasso C3 2010, the passenger side door intermittently fails to lock. Central locking engages wing mirrors fold in and doors lock, however I can on occasions just open the passenger door. It does not fail all the time so is very intermittent.

Ruled out fuse and key fob based on it being intermittent.

Any suggestions would gratefully be received.

Many thanks in advance.

Hi

Try a new door solenoid.

Its in the door, access by removing the door card.

Its the bit that actually looks the door from the lock signal.