DTC P0713: Transaxle Fluid Temperature Sensor Circuit Open: Description
WARNING: This page is about a different car, the 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
Vehicle speed is 12.4 MPH or greater, and signal from TFT sensor is -86 °F (-30 °C) or less for 150 seconds or more.