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
Transaxle Fluid Temperature (TFT) sensor is a thermistor which is part of the Pressure Switch Assembly (PSA). PCM supplies a 5 volt reference signal to sensor on circuit No. 1227 (Yellow/Black wire). When transaxle fluid is cold, sensor resistance is high and PCM will sense a high signal voltage. As transaxle fluid warms, sensor resistance lowers and PCM senses lower voltage. PCM uses TFT sensor readings to control TCC apply and release, line pressure adjustments and temperature compensated shifts. DTC P0712 detects a continuous short to ground in TFT sensor 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.