Code P057, Shorted Transaxle Temperature Sensor Circuit: Notes
WARNING: This page is about a different car, the 1995 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
Transaxle temperature sensor is a thermistor whose resistance varies based on its temperature. As sensor temperature increases, resistance decreases. A high transaxle temperature will result in a low signal voltage on circuit No. 585. Code P057 sets when PCM see transaxle temperature sensor reading of 298°F (148°C) or greater (0.8 volt or less).