The B1848 Code is related with the engine and meaning of the code depends on the manufacturer. Because the same code is found for many cars but meaning is found as same. Different manufactures set different meanings for this code. You need to read the manual if you really want to know the real meaning of the code. The basic meaning of the code does not help you a lot but it is necessary to know if you want to get the problem. Suppose, the code started with the B and dictionary meaning of the B is body of the engine. It means that body of the engine has the main problem.