The B1633 Code is very meaningful and it is related with the car engine. If you want to solve the problem of the vehicle engine problem, you need to identify the exact meaning of the code. This code is used in multiple cars and meanings are also different. You can easily solve the problem after getting manual or know the name of the manufacturer and model number. 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. 3 for Cruise Control Servo Indicates Low. 3 for Transmission Control Module Reprogrammable Memory.