Keith Corley was also acquitted of sexual assault charges.
He was found guilty of indecent exposure and official oppression.
Corley was charged in August, 2011, after a woman in her 30s told police she was sexually assaulted in a patrol car by a police officer.
Corley, then 27, was charged after sources said DNA evidence linked him to the crime.
Corley is a four-year veteran of the Philadelphia Police Department assigned to the 18th District.
