The body of the engine has the main problem and that is why, the B1857 Code comes. The body of the engine is the main problem. The unique multi-displacement system shut off opposite sets of cylinders, allowing the engine to have 3 dissimilar formations and shifts. The B1857 code had an elaborate diagnostics process, counting showing engine error codes on the air training display. However, the system was worrying, misinterpreted by customers, and a rash of random failures led to the technology being rapidly retired. However, if you have taken the car and tested it , then the problem will be fixed.