The engine P0142 Code is a powertrain problem and the problem is found in the car engine. Do not drive the car with any problem in the car engine. The main different shift system turned off conflicting pairs of cylinders, letting the engine to have 3 different shapes and displacements. The engine P0142 code had an sumptuous diagnostics process with showing engine trouble codes on the air taming display. But, the system was seriously troublesome, misjudge by customers, and a rash of erratic failures led to the technology being rapidly retired. This powertrain problem can be solved at the cheap rate without changing much component.