How do you reset dash lights and centrel locking on citroen Picasso year 2000?

To reset the dash lights and central locking on a 2000 Citroën Picasso, first, disconnect the car's battery by removing the negative terminal for about 15 minutes. This may reset the electronic systems, including the dash lights and central locking. After reconnecting the battery, check if the issues are resolved. If not, consult the vehicle's manual or a professional for specific diagnostic procedures.