Code 62, High Engine Oil Temperature: Notes
WARNING: This page is about a different car, the 1990 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
The engine oil temperature sensor is a thermistor, similar to a coolant or air temperature sensor. When engine oil temperature is cold, sensor resistance is high and the ECM will see a high monitored voltage signal on engine oil temperature sensor circuit. As temperature increases, resistance decreases and the ECM sees a lower monitored voltage engine oil temperature sensor circuit.
NOTE:
Test numbers refer to test numbers on diagnostic chart.
Test Number 1) Code 62 will set if engine oil temperature sensor indicates a temperature greater than 291°F (144°C) and engine has been running for more than 30 minutes.