03 Sequoia Transmission Speed Sensor Car Quest
Symptoms of a Bad Transmission Speed Sensor
The transmission speed sensor is a small, electronic device that measures the rotational speed of the transmission’s input shaft. This information is then sent to the powertrain control module (PCM), which uses it to calculate the vehicle’s speed and shift the transmission accordingly.
When the transmission speed sensor fails, it can cause a variety of problems, including:
- Erratic shifting
- Harsh shifting
- Slipping gears
- Loss of power
- Check engine light
Causes of a Bad Transmission Speed Sensor
There are several factors that can cause a transmission speed sensor to fail, including:
- Wear and tear
- Electrical problems
- Mechanical damage
How to Test a Transmission Speed Sensor
If you suspect that your transmission speed sensor is bad, you can test it using a multimeter. To do this, follow these steps:
- Disconnect the electrical connector from the transmission speed sensor.
- Set the multimeter to the AC voltage setting.
- Connect the multimeter leads to the terminals on the transmission speed sensor.
- Start the engine and let it idle.
- Note the voltage reading on the multimeter.
If the voltage reading is less than 0.5 volts, the transmission speed sensor is likely bad and needs to be replaced.
How to Replace a Transmission Speed Sensor
Replacing a transmission speed sensor is a relatively simple task that can be completed in about an hour. To do this, follow these steps:
- Disconnect the negative battery terminal.
- Locate the transmission speed sensor. It is usually located on the side of the transmission.
- Unbolt the transmission speed sensor from the transmission.
- Disconnect the electrical connector from the transmission speed sensor.
- Install the new transmission speed sensor.
- Tighten the bolts that hold the transmission speed sensor in place.
- Connect the electrical connector to the transmission speed sensor.
- Connect the negative battery terminal.
Cost to Replace a Transmission Speed Sensor
The cost to replace a transmission speed sensor varies depending on the make and model of your vehicle. However, you can expect to pay between $100 and $300 for parts and labor.
Conclusion
The transmission speed sensor is an important part of your vehicle’s transmission system. If it fails, it can cause a variety of problems. If you suspect that your transmission speed sensor is bad, be sure to have it tested and replaced as soon as possible.
