The indicated percentage representing engine demand while the vehicle is stationary and the engine is warmed to operating temperature is a critical diagnostic parameter. As an example, a reading significantly above the expected range might suggest underlying mechanical issues or parasitic drag within the powertrain. This figure is derived from a complex algorithm factoring in parameters like manifold absolute pressure, engine speed, and injector pulse width.
Understanding this metric offers significant benefits in diagnosing engine performance problems and predicting potential failures. Historically, its relevance has grown with increasingly sophisticated engine management systems, providing a more nuanced perspective than simple RPM readings. Evaluating this parameter helps technicians identify inefficiencies that lead to increased fuel consumption and emissions, ultimately contributing to improved vehicle longevity.
