Method and apparatus for detecting a leak of a tank of a vehicle and a computer program product

A method for detecting a vehicle of a leak of a tank (3) (1), wherein in a first step (S1) between a beginning (T2) and an end time (T4) a predefined time window (Tf) at least two measured values ​​(M1, M2 ) (T) are determined of a tank temperature, depending of which a cumulative increase (D +) and a drop (therefore, the tank temperature is determined (T) D), wherein in the case that a predetermined first threshold value (Dmax) (by the cumulative increase D + ) is exceeded, and / or the waste (D) to the end time (T4) is less than a predetermined second threshold value (Dmin), the start (T2) of the predetermined time window (Tf) is shifted in time and the first step (S1 ) is repeatedly performed, and otherwise, in a second step (S2) from a time spans beginning (T3) in a predetermined time period (Tc) is a state of a characteristic value (S) is determined which is representative for the leakage of the tank (3).