The definition of the C1148 Code is found online but do not follow the general engine code meaning for solving the engine problem. The major multi-displacement method shut off differing pairs of cylinders, letting the engine to have 3 diverse formations and displacements. The engine C1148 code had an elaborate diagnostics process, including viewing engine problem codes on the air conditioning display. However, the system was worrying, misunderstood by customers, and a rash of random failures led to the technology being quickly retired. The oxygen sensors on your car portion the oxygen in the finish to fix how rich or thin the ratio of fuel and air are in the cylinders.