The engine code B2503 is related with the body of the engine and getting the meaning of the code is necessary to solve the problem from the car engine. You should fix the car engine if you able and if you do not know how to fix the car engine, then you need to take help from the automobile engineer. The automobile engineer needs to get the genuine meaning of the code and he needs to rely on the manufacturer meaning. So, it is necessary to read the manual of the car or know the manufacturer name and model number of the car.
The general or dictionary meaning of the code is B for Body Code Problem is antilock brake system, electronic suspension and steering systems. 2 for MFG – Manufacturer Specific. 5 for Computer And Auxiliary Outputs. 0 for IC Circuit High Voltage and 3 for Transmission Control Module Reprogrammable Memory. You do not think to use this common meaning for solving the car engine. The body of the engine has the main problem and without facing any problem, it is easy to fix at low rate but the car engine can be fixed with automobile engineer. Do not try to fix it by yourself.