A 23-year-old Kennedy Center employe was injured yesterday when a car shot out of a parking lot and carreened across 15th Street NW onto the sidewalk and over a parking meter, pinning her against the front of The Washington Post Building.

The woman was taken to George Washington University Hospital where a spokesman identified her as Stephanie Barton of 3701 Macomb St. NW.

She was listed last night in fair condition with contusions and abrasions and a jaw injury. Tests were still being made to determine whether she also had suffered internal injuries.

The driver of the 1978 Oldsmobile Cutlass was Hing Ong Moy of 12920 Georgia Ave., Wheaton, according to police.

Roosevelt Powers Jr., an attendant at the Colonial Parking Lot at 1125 15th St. NW., said that he brought up the car yesteday from a lower parking level, Moy got into the driver's seat and said, "I'll see you later."

"He put it in gear," said Powell, "and shot straight across the street. It looked like the accelerator hung up on him."

Witnesses said Moy, apparently uninjured, immediately got out of the car and called for help. Between 15 and 20 people assisted in pulling the car away from Barton.