A (TFT) transmission fluid temperature sensor is one of several sensors providing input to the (TCM) transmission control module. It’s located in the valve body or oil pan of the transmission or transaxle. The TCM uses this sensor to monitor the temperature of the transmission fluid.

The transmission position sensor, also known as the transmission range sensor, is an electronic sensor that provides a position input to the Powertrain Control Module (PCM) so that the transmission can be properly controlled by the PCM according to the position commanded by the sensor.

Top Signs of a Failing Transmission Position Sensor

1. Car fails to move out of park. When your vehicle is unable to shift out of neutral or park, this is a clear indication that there is a serious problem somewhere in the transition system.
2. Transmission shifts into the wrong gear.
3. Vehicle becomes locked in a single gear.

How do you change a transmission temperature sensor?

1. Disconnect the battery.
2. Remove the undercover under the transmission.
3. Drain the radiator.
4. Drain the ATF.
5. Remove the bolts that secure the valve body cover and remove the cover.
6. Use a small screwdriver to pry the connector from the oil temperature sensor.

If you see this red light come on in your car, you should first pull over to allow your transmission to cool. If not, you could cause expensive transmission damage. Then, as soon as you can, bring your car in to have it serviced immediately.

Install the scan tool, start the vehicle and look for the transmission temperature. The fluid temperature should be between the 185- and 194-degree marks with an idle of 600 to 800 rpms. Remove the bolts and clips from the front fender well on the driver’s side, and locate the transmission fill plug; remove it.

Lemur: Unfortunately transmission temperature is not part of the OBDII standard live data set and is not currently supported by BlueDriver.

175 to 220 degrees

The ideal temperature for it is 175 degrees, plus or minus 25 degrees, and when the transmission gets below zero degrees, it gets too thick. The fluid can also fail to lubricate parts when it is too cold, wearing parts down unnecessarily.