Method and apparatus for detecting losses of an internal combustion engine

A method for determining a loss (1) of an internal combustion engine, wherein a load-dependent loss portion (3) is determined, wherein a temperature-dependent loss component (2) is determined, wherein a pumping-loss portion (4) is determined, and wherein the loss of (1) as the sum of the load-dependent loss component (3), the temperature-dependent loss component (2) and the pumping-loss portion (4) is determined, characterized, that the pumping-loss portion (4) in response to a charge pressure (p