Code P0713, Transaxle Temp Sensor High Temp Indicated: Notes

WARNING: This page is about a different car, the 1994 Oldsmobile Ninety-Eight and 1994 Buick Park Avenue. However, it is still accessible from the selected car via links, so may be relevant.

Transaxle temperature sensor uses a thermistor to vary signal voltage to PCM according to temperature. PCM applies and monitors a voltage to sensor. When transaxle fluid is cold sensor resistance is high. Thus, PCM will monitor a high signal voltage. As transaxle fluid warms, sensor resistance becomes less and voltage drops. At normal operating temperature of 68°F-194°F (20°C-90°C) transaxle temperature signal will measure approximately 2-4 volts.

Code P0713 will set when the following conditions are present.

Engine run time is over 1 minute.
Transaxle temperature sensor signal indicates a temperature greater than 284°F (140°C).
Above conditions for over 1.6 second.

With Code P0713 set, PCM will substitute ECT sensor value for transaxle temperature. Tech 1 will continue to display actual transaxle sensor value. Code P0713 does not illuminate the Malfunction Indicator Light (MIL).

NOTE: Test numbers refer to numbers on diagnostic chart.

Determines if conditions necessary to set Code P0713 still exist.
This test determines if input circuit is shorted to ground which will cause conditions necessary for Code P0713.