Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Circuit Description
Transmission Fluid Temperature (TFT) sensor is a thermistor. TFT sensor is part of Transmission Fluid Pressure (TFP) manual valve position switch. PCM supplies a 5-volt reference signal to sensor. When transaxle fluid is cold, sensor resistance is high and PCM senses a high signal voltage. As transaxle fluid warms, sensor resistance lowers and PCM senses lower voltage. PCM uses TFT reading in order to control TCC apply & release, line pressure adjustments, and temperature compensated shifts. DTC P0712 will set when PCM detects a continuous short to ground in TFT circuit or TFT sensor.
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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.