Abstract: A method for measuring a temperature of a coolant in a power module may include measuring a first temperature with a first temperature sensor and measuring a second temperature with a second temperature sensor. The method may include calculating a difference between the first temperature and second temperature, identifying one or more thermal resistances and one or more thermal capacitances with a thermal circuit corresponding to the power module and based on the calculated difference and at least one power loss in the power module. The method may further include determining the temperature of the coolant from the identified thermal resistances, thermal capacitances, the at least one power loss, and at least one of the two temperatures.