I've searched Google and most of the forums looking for an answer....

Basically I can't lock the car using the remote or lock all doors with the key either. When the lock button is pressed on the key/fob a short blip sounds from the alarm siren as if to say a door isn't closed properly etc..

Each door when opened displays on the dash inc bonnet and boot so it appears each lock switch is working as it should.

The micro switches in the drivers door lock appear to be working OK as one way will open all doors and the other will lock that door only and also sound the siren blip as above.

When I disconnect/ reconnect the fuse for the central locking the system works as it should.....I can lock/unlock 100 times and everything works as it should until the engine is started..stopped then back to the fault again.

When the fault is present I can't lock the doors from the interior lock button either.

Anti hijack works as should and locks all doors at x mph. Not sure what else it can be. Anybody got any ideas?