A method for a hybrid-electric vehicle is presented, wherein a fuel tank is sealed closed during a first condition that includes an inductive charging event, and wherein degradation of a fuel tank pressure transducer is indicated responsive to a fuel tank pressure transducer output failing to increase above a threshold following an active testing duration. The outer walls of the fuel tank may include ferrous components which are energized by a magnetic field generated during the inductive charging event, thus heating the fuel tank and the fuel stored within. In this way, the pressure within the sealed fuel tank increases during the inductive charging event, and a determination may be made as to whether the output of the fuel tank pressure transducer is rational.