The B1596 Code is related engine and when the engine is checked, then the come comes. This code is found for different model and manufacturer of car and that is why, you have to know the exact model and manufacturer of the engine. It seems that the problem is not so serious. The original multi-displacement method turned off reverse pairs of cylinders, letting the engine to have 3 different shapes and displacements. The B1596 code had an extravagant diagnostics process, with showing engine distress codes on the air conditioning show. However, the system was worrying, misread by customers, and a rash of random failures led to the technology being rapidly discharged.