Does replacing the oil temperature sensor require removing the transmission?

2 Answers
VonMariana
07/29/25 2:42am
Replacing the oil temperature sensor does require removing the transmission. The transmission oil temperature sensor is installed on the valve plate inside the transmission oil pan. Its main function is to detect the temperature of the automatic transmission hydraulic oil. When removing the transmission, be careful not to pull hard on the wiring harness on the valve plate. The testing method for the oil temperature sensor is as follows: 1. Measure the resistance value of the oil temperature sensor: Remove the transmission oil temperature sensor, place the sensor in a beaker filled with water, heat the water in the beaker, and measure the resistance between the two terminals of the sensor at different temperatures. 2. Standard resistance value for the sensor: Compare the measured resistance value with the specified value. If the resistance value differs significantly from the specified value, it should be replaced.
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LeAllie
08/12/25 6:37am
I've replaced the transmission fluid temperature sensor myself before. On most cars, this part is installed externally and can be easily accessed without removing the entire transmission. Take my Honda for example - just pop the hood, locate the sensor (usually on the side of the transmission), remove the single mounting bolt, unplug the electrical connector, and install the new one. For older models, you might need to remove some brackets or shields by unscrewing a few bolts, but the transmission itself generally stays untouched. When doing this DIY job, I prepare a wrench and gloves, making sure the engine is off and completely cooled to avoid burns or electric shock. Check your vehicle manual or online tutorials to confirm the exact location, and the whole replacement can be done in about half an hour while saving some money.
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