Remote locking not working, fob flashing lights but nothing happens with locks. Cannot unlock front passenger door or lock side sliding door. Driver and Rear doors can be locked unlocked manually. Any suggestions great fully received thanks Gordon

What car?

Ducato van it’s in the title

Does it work with the driver's door key?

Yes I can unlock drivers door only with the key and rear doors with key. But individually. The passenger door remains locked as no way of opening it manually, thanks Gordon

Any help?

Thank you very much