Vehicular liquid containment system and method for verifying integrity of same

It is proposed a vehicular liquid containment system comprising a tank (1), a pressure sensor (7) arranged to detect a pressure in a vapor dome inside the tank (1), a thermistor array (2) arranged to detect temperatures at a plurality of levels of the tank (1), and leak detection logic operatively connected to the pressure sensor (7) and the thermistor array (2). The leak detection logic is configured to: - use a first thermistor (3") of the thermistor array (2) to perform a first measurement indicative of a temperature in a vapor dome in the tank (1); - estimate an expected pressure evolution in function of at least the first temperature measurement; - monitor pressure sensed by the pressure sensor (7), - determine whether the monitored pressure deviates from the expected pressure evolution, and - generate a leak condition signal, conditional on said determining.