The Andrew J. Barberi began carrying passengers between Staten Island and Manhattan at 9:30 a.m. on Sunday morning. It was the ferry's first trip since the crash that injured several people and caused minor damage to the boat.
Federal investigators suspect that a defective part caused the crash at the Staten Island terminal on May 8.
The National Transportation Safety Board said Friday that tests had confirmed that the propulsion system wasn't responding properly. Certain components were replaced and the problems went away.
In 2003, the same ferry crashed into the same pier when its pilot passed out at the wheel. Eleven people died. The ferry was rehabilitated.