The engine B1683 Code has a meaning and it is important thing to get the accurate meaning of the code for solving the issue. As the same code is found for several car engines, it is difficult to locate the cause of the problem. The dictionary meaning of the code gives some idea about the problem and the dictionary meaning is B for Body Code Problem is antilock brake system, electronic suspension and steering systems. 1 for MFG – Manufacturer Specific. 6 for Vehicle Speed Control and Idle Control System 8 for Exhaust Gas Recirculation System Valve 1 and 3 for Transmission Control Module Reprogrammable Memory.