Code Civ. Proc., § 580d

(a) Except as provided in subdivision (b), no deficiency shall be owed or collected, and no deficiency judgment shall be rendered for a deficiency on a note secured by a deed of trust or mortgage on real property or an estate for years therein executed in any case in which the real property or estate for years therein has been sold by the mortgagee or trustee under power of sale contained in the mortgage or deed of trust.

(b) The fact that no deficiency shall be owed or collected under the circumstances set forth in subdivision (a) does not affect the liability that a guarantor, pledgor, or other surety might otherwise have with respect to the deficiency, or that might otherwise be satisfied in whole or in part from other collateral pledged to secure the obligation that is the subject of the deficiency.

(c) This section does not apply to a deed of trust, mortgage, or other lien given to secure the payment of bonds or other evidences of indebtedness authorized or permitted to be issued by the Commissioner of Financial Protection and Innovation or which is made by a public utility subject to the Public Utilities Act (Part 1 (commencing with Section 201) of Division 1 of the Public Utilities Code).