Can a judge who determines that she is disqualified participate in the proceeding?

A judge who determines that she is disqualified must recuse herself and not further participate in the proceeding, unless the disqualification is waivable and waived in writing. ( 170.3, subd. (a)(1).) If grounds for disqualification first arise or are first learned by the judge after the judge has ruled in a proceeding but before she has completed judicial action in that proceeding, the judge shall disqualify herself unless the grounds for disqualification are waived. ( 170.3, subd. (b)(4); Hayward v. Superior Court (2016) 2 Cal.App.5th 10, 45 (Hayward).)