Devices are provided having an anode, a cathode, and an emissive layer disposed between and electrically connected to the anode and the cathode. The motor includes substantially identical first and second motor housing assemblies attached to first and second axially opposite ends of the gerotor gear set, and defining first and second fluid ports, respectively. Thereafter, whether or not the driving mode of the hybrid vehicle is consistent with an electric vehicle mode is determined using the power reserved to drive the motor, which has been calculated using the PSAT model. A processor 1) receives DP and T measurements at certain time intervals to determine the temperature at time zero, the differential pressure at time zero, the temperature at a certain time, and the differential pressure at a certain time, and 2) when is greater than a certain value, compares DPt to a certain differential pressure value.