Cal. Probate Code § 10454

(a) Any interested person may file a petition requesting that the court make either of the following orders: (1) An order revoking the authority of the personal representative to continue administration of the estate under this part. (2) An order revoking the full authority of the personal representative to administer the estate under this part and granting the personal representative limited authority to administer the estate under this part. (b) The petition shall set forth the basis for the requested order. (c) Notice of the hearing on the petition shall be given as provided in Section 1220. In addition, the personal representative shall be served with a copy of the petition and a notice of the time and place of the hearing at least 15 days prior to the hearing. Service on the personal representative shall be made in the manner provided in Section 415.10 or 415.30 of the Code of Civil Procedure or in such manner as may be authorized by the court. (d) If the court determines that good cause has been shown, the court shall make an order revoking the authority of the personal representative to continue administration of the estate under this part. Upon the making of the order, new letters shall be issued without the notation described in subdivision (c) of Section 8405. (e) If the personal representative was granted full authority and the court determines that good cause has been shown, the court shall make an order revoking the full authority and granting the personal representative limited authority. Upon the making of the order, new letters shall be issued with the notation described in subdivision (c) of Section 8405 that is required where the authority granted is limited authority.