A Mercedes-Benz belonging to the 'Idol' judge clipped another car on the freeway last December.
Abdul was not in court as her attorney entered the plea, city attorney's spokesman Frank Mateljan said.
Superior Court Commissioner Patricia Schwartz sentenced Abdul to 24 months of informal probation.
She also was ordered to pay about $900 in fines and penalties and to reimburse the other motorist $775 for the car damage, Mateljan said.
The charge carried a maximum penalty of six months in jail and a $1,000 fine.
"Unbeknownst to Paula, there was some minor contact between the tire of her car and another vehicle on the roadway,'' said a statement from her attorney, Neil E. Meyer. "Paula immediately took full responsibility.''
Authorities said Abdul was driving Dec. 20 on Highway 101 in Encino, about 15 miles northwest of downtown, when she changed lanes and struck another vehicle.
The crash caused minor damage to that other driver's car. The driver of that car and passenger snapped a photograph with a cellular telephone camera and wrote down the license plate number of the car, which was traced to Abdul, Mateljan said.
Abdul is one of three judges on "American Idol,'' Fox's top-rated TV talent show.
Source: AP