The B1850 Code relates information about the car engine problem and it is important to solve the car problem before drive the car. Engine of the car has the main problem and it is important solve the professional’s help. The main multi-displacement system shut off the conflicting pairs of cylinders, letting the engine to have 3 various configurations and displacements. B1850 code had an elaborate diagnostics process, including showing engine problem codes on the air conditioning display. However, the system was worrying, misinterpreted by customers, and a rash of random failures led to the technology being rapidly retired. It is very easy to fix the problem.