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 P0712 will set when the following conditions are present.

Engine run time is over 2 minutes.
Transaxle temperature sensor signal indicates a temperature less than -40°F (-40°C).
Above conditions for over 1.6 second.

With Code P0712 set, PCM will substitute coolant sensor temperature value for transaxle temperature. Tech 1 will continue to display actual transaxle sensor value. Code P0712 does not illuminate the Malfunction Indicator Light (MIL).

NOTE: Test numbers refer to numbers on diagnostic chart.

Determines if conditions necessary to set Code P0712 exist.
Simulates conditions to set Code P0713. If PCM recognizes low signal voltage and sets Code P0713, wiring and PCM are okay.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Code P0712, Transaxle Temp Sensor Low Temp Indicated: Notes

Use the Manual With the Right Hardware

When to See a Mechanic

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