The crash happened at about 7:30 a.m. in the northbound lanes of Highway 101, just south of Harney Road.
CHP spokesman Shawn Chase said the officer was attempting to pull to the right shoulder of the highway to assist another officer who was responding to two stalled vehicles.
The officer was sideswiped by an older-model Honda as he approached the shoulder of the highway, Chase said.
"He had some road rash and facial lacerations," Chase said. The officer was taken to the hospital to be treated for injuries that were considered minor, according to Chase.
The man driving the Honda was taking two children to school and nobody in that vehicle was injured, Chase said.
He said the driver was unlicensed and did not have insurance. The driver was cited and his vehicle will be impounded for 30 days.
The officer injured in the collision has been with CHP for 26 years and has been a motorcycle officer for more than 15 years, according to Chase.
The official cause of the crash remains under investigation.