Supplementing engine control via a diagnostics port

An electronic device comprising:

• a housing;
• a connector that allows the electronic device to be coupled to a network port associated with a vehicle having a vehicle controller arranged to direct operation of an vehicle in a plurality of different operating state;
• and
• a processor and a memory disposed within the housing, wherein the processor is configured to send a control command message to the vehicle controller through the network port as the vehicle is being driven, and wherein the control command causes the vehicle controller to direct operation of the vehicle in a selected one of the plurality of different operating modes that is different than the operating mode that the vehicle controller would otherwise direct operation of the vehicle in, without requiring any modification of the vehicle controller and without falsifying any information sent to the vehicle controller;
• whereby during use, the electronic device may cause the vehicle controller to operate the vehicle in the selected operating mode in manner dictated by the engine controller.