Horry County police investigators say the 24-year-old woman called for help around noon Thursday, telling police she was pulled out of her car by a man while stopped at a traffic light in Conway.
The woman told police the man held a knife to her throat, put her in her trunk and drove off.
It took officers about 30 minutes to find the woman using the signal from her cell phone.
Police say the woman is in custody, but no charges have been filed. They did not say why she claimed she was kidnapped.