The PTS-04 part of the Engineering is the Powertrain System. It includes all of the components that make up the powertrain of a vehicle, including the engine, transmission, axle, and driveline. The system also includes the control systems that regulate how these components interact and coordinate to give the vehicle its optimal performance. This can include fuel and emissions systems, as well as brake, suspension, and steering components. The PTS-04 System is responsible for ensuring that the vehicle runs smoothly, efficiently, and safely, and that all its components are operating as intended. It is also essential for providing the driver with the best possible driving experience.