The B1680 Code has dictionary meaning what is not enough to identify the problem of the engine. With the dictionary meaning of the code, it is necessary to know the name of the manufacturer and model number of the car to get the meaning of the code. The dictionary meaning of the code 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 0 for Transmission Engaged at High Throttle Angle.