The automobile dictionary meaning of the engine B2603 Code is not necessary to use for solving the car engine and automobile dictionary meaning of the code is found online. The general or the automobile dictionary is B for Body Code Problem is antilock brake system, electronic suspension and steering systems. 2 for MFG – Manufacturer Specific. 6 for Vehicle Speed Control And Idle Control System. 0 for IC Circuit High Voltage and 3 for Transmission Control Module Reprogrammable Memory. The body of the car engine is easy to solve and general meaning of the code also gives the information. You may get some information from the automobile meaning.