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.
Automatic Transmission Fluid Temperature Sensor
The automatic transmission fluid temperature sensor is installed on the valve body. This sensor uses the thermistor that resistance changes according to the temperature change.
When TCM supplies approximately 3.3V power to the sensor, the sensor output changes according to the temperature change of ATF.
This automatic transmission fluid temperature is a very important element in the automatic transmission and it is entered to PCM, and this fluid temperature sensor information is used for various important purposes such as the operation of damper clutch, detection of non-operation area, fluid temperature variation control and fluid pressure control at the time of shifting.
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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.