Code P059, Open 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 low transaxle temperature will result in high signal voltage on circuit No. 585. Code P059 sets when PCM sees a transaxle temperature sensor reading of -31°F (-35°C) or less (4.9 volts or greater).