The B1573 Code has a value and the value of the code is related with faulty engine. The same code you will get from multiple cars but meanings of the cars are not same. A professional engineer before solving the problem will know the name of the manufacture and model number as well as read the manual of the engine. The dictionary meaning is also necessary to know for solving the problem. The dictionary meaning is B means Body Code Problem is antilock brake system, electronic suspension and steering systems. 1 for MFG – Manufacturer Specific. 5 for Computer and Auxiliary Outputs. 7 means Vehicle Speed Output Circuit. 3 means Transmission Control Module Reprogrammable Memory.