No!
The police cannot remove your tenant(s) without a legally obtained court order called the writ of possession.
Furthermore, California tenant protection laws prohibit landlords from changing the locks.
Under California Civil Code 789.3, a lawsuit against the landlord may be initiated by the tenant for punitive damages, plus attorney fees for each day they are locked out of the property.
In addition, the landlord could be guilty of a misdemeanor and punished by a fine of up $2,000 or six months imprisonment in County jail, or both.