A vehicular diagnostic communications system, and components thereof, are provided for an apparatus and technique for communicating vehicular diagnostic information over a cellphone network. The system includes a code reader having a vehicle diagnostic port connector for receiving vehicle diagnostic information from the vehicle diagnostic port. The code reader also has a local connectivity network circuit for communicating vehicle diagnostic information between the vehicle diagnostic port connector and a local connectivity circuit. A cellphone is arranged in communication with the local connectivity network for communicating vehicle diagnostic information between the code reader and a cellular telephone network.