A sibling of an Auckland toddler killed in her parents' driveway is believed to have opened the front door of the family home moments before the accident occurred.

Talitauaiseaso Itamua, 22 months, died at her Weymouth home on Sunday.

Ambulance staff tried to revive her but the toddler died at the property.

Constable Clare Jackson said a male relative, who lived at the home, was moving a car when Talitauaiseaso ran behind the vehicle.