What is California penal code 166?

It deals with contempt of court.

In California, violations of court orders are covered under Penal Code Section 166.4. This section states:

"Except as provided in subdivisions (b), (c), and (d), every person guilty of any contempt of court, of any of the following kinds, is guilty of a misdemeanor:"

"Willful disobedience of the terms as written of any process or court order or out-of-state court order, lawfully issued by any court, including orders pending trial."