Diagbox is the diagnostics tool written for PSA vehicles, it should be specialist but it's readily available on ebay.
You could try a BSI reset, which scoey1001 kind of did. The correct procedure is as follows;
- Put the driver's window down, lift the bonnet and ensure all equipment is switched off.
- Ensure all doors are closed and remove key from the ignition.
- Wait for 3 minutes, disconnect the vehicle battery and wait 15 seconds.
- Reconnect the vehicle battery, wait a further 10 seconds (do not open doors.).
- Switch on the side lights through the driver's window.
- Switch on the ignition and check system's functionality.
- Hold lock button on key down for 10 seconds.
- Remove key open & close door test central locking system.
- Start the engine and complete the system's check.
Failure to follow this procedure could result in incorrect operation of many BSI related items.