Princeton Junction is a railroad station in Princeton Junction, New Jersey, located in West Windsor Township. It serves NJ Transit (NJT) and Amtrak on the Northeast Corridor (NEC), and NJ Transit on the Princeton Branch. The station's Amtrak station code is PJC.
PJC is the NJT and Amtrak station code for Princeton Junction.
Context does not state whether or not the NJT system uses the same code as Amtrak. The system probably tripped on the order of the wording and missed the context.