Los Angeles city attorney's spokesman Frank Mateljan says Warren was also sentenced to serve five years of informal probation.
The "Planet of the Apes" actress had been facing four misdemeanor charges after her arrest earlier this year for crashing into three parked cars and tussling with police.
The 32-year-old was previously convicted of drunken driving in 2007.
Mateljan says Warren a hearing will be held on Oct. 7 to determine if Warren must pay any restitution.
She starred opposite Mark Wahlberg in Tim Burton's 2001 version of "Planet of the Apes" and has also worked as a fashion model.