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What is a turbine shaft speed sensor?

Author

William Jenkins

Published Mar 17, 2026

What is a turbine shaft speed sensor?

An input/turbine speed sensor / turbine speed sensor / TSS is an electromagnetic device that the engine control unit (ECU) uses to monitor the transmission input shaft speed/RPM.

Thereof, where is turbine speed sensor?

Located on or inside your vehicle's transmission, the turbine speed sensor measures the RPM of the turbine shaft. Once the PCM or TCM detects an irregularity in the turbine speed input, it will trigger the illumination of the Check Engine Light.

Subsequently, question is, what does main shaft speed sensor mean? rotational speed

Likewise, what is a turbine input shaft speed sensor circuit?

The input/turbine speed sensor is used to measure how many revolutions per minute (RPM) the input shaft of the transmission is turning. It is usually a three-wire sensor that reads a reluctor ring in the transmission.

How do I fix code P0716?

  1. Replacing a failed input speed sensor.
  2. Replacing a failed output speed sensor.
  3. Rebuilding a damaged transmission (indicated by finings and contamination in the transmission fluid)
  4. Repairing or replacing damaged wiring.
  5. Repairing corroded connections.
  6. Replacing failed circuitry.

What is the purpose of a turbine speed sensor?

A turbine speed sensor, also termed an input speed sensor, is used for measuring the performance of the turbine by evaluating transmission performance and other components of the turbine. It also detects the rotation speed of the turbine, which shows the input revolution of the transaxle.

Can I drive my car with a faulty speed sensor?

That is why in general, it is unsafe to drive a vehicle with a broken wheel speed sensor. If the wheel speed sensor becomes damaged or wears out, initially you probably won't notice much difference in the way your car performs if your ABS light comes on unless you are driving on slippery pavement.

What are the signs of a bad speed sensor?

Here are the symptoms of a bad or failing transmission speed sensor
  • Harsh or improper shifting. Without a valid speed signal from these sensors, the PCM will not be able to correctly control the shifting of gears within the transmission.
  • Cruise control does not work.
  • Check Engine Light comes on.

How much does it cost to replace a speed sensor?

To replace the speed sensor, you are going to pay, on average, between $330 and $380. The labor should only cost you between $80 and $100, while parts will run you about $265.

How do you test a transmission speed sensor?

Vehicle Speed Sensor Testing Turn the ignition switch to the OFF position. Disengage the wiring harness connector from the VSS. Using a Digital Volt-Ohmmeter (DVOM), measure the resistance (ohmmeter function) between the sensor terminals. If the resistance is 190–250 ohms, the sensor is okay.

How do you change a transmission speed sensor?

Replacing Your Transmission Speed Sensors
  1. Having found the sensor or sensors to be faulty, remove the connector between the sensor and the vehicle's wiring.
  2. Using the proper socket, remove the faulty sensor.
  3. Connect the new sensor to the vehicle's wiring.
  4. Install the new sensor.
  5. Lower your car.
  6. Start the engine.

How do you fix a speed sensor circuit malfunction?

What repairs can fix the P0720 code?
  1. Replacement of the output speed sensor.
  2. Replacement of the input speed sensor.
  3. Replacement of the wires or connectors.
  4. Drain and refill of the transmission fluid.
  5. Replacement of the PCM.

How do you fix po715?

What repairs can fix the P0715 code? The most common repairs for a P0715 are as follows: Replacing the input speed sensor. Repairing damaged wiring for the input speed sensor.

What does Engine code P0730 mean?

incorrect gear ratio

How do I fix my P0500 code?

What repairs can fix the P0500 code?
  1. Vehicle speed sensor drive gear replaced.
  2. Repair or replacement of the wiring harness.
  3. Vehicle speed sensor replaced.
  4. Poor electrical connection resolved.

What is code P0717?

P0717 code definition

The PCM (powertrain control module) will set the P0717 code when it detects no signal from the input/turbine speed sensor. This signal may be interrupted briefly, or it may be erratic or otherwise outside of expected manufacturer settings.

What is code P0725?

engine speed input circuit

What is the difference between vehicle speed sensor and transmission speed sensor?

If you noticed, I've used the words, transmission speed sensor and vehicle speed sensor so far. The only difference between the two is what the manufacturer decides to call it. In either case, the faster the transmission output shaft moves, the more voltage the sensor produces.

What causes a speed sensor to go bad?

Over time, the transmission speed sensor can go bad due to wiring issues or just outright failing due to it constantly being used every time you are driving your vehicle. If the sensor is magnetic, it can go bad from iron sticking to the tip of the sensor, which will cause an inaccurate reading.

Can a faulty ABS sensor cause transmission problems?

So, can ABS sensor cause transmission problems? Yes, it can. ABS can cause trans shifting problems. We would advise that you always pay attention to the signals that appear on your car's dashboard.

Which speed sensor controls the speedometer?

The vehicle speed sensor (VSS) is also commonly referred to as a transmission speed sensor or output shaft speed sensor. It is a small device—typically mounted somewhere on the transmission—that determines how fast your vehicle is going by measuring the rotation of a toothed wheel on a shaft inside the transmission.

Can a bad sensor cause transmission problems?

The sensor is also a component of the pressure control system for the automatic transmission. If failure of this sensor takes place, then the transmission may produce both soft as well as hard shifting or soft shifting. Drivers may also see transmission fault code.

What is the difference between an input and output speed sensor?

Transmission input/output sensors calculate the transmission's actual gear ratio during usage. The first sensor, referred to as the input sensor, monitors the speed of the transmission's input shaft. The second sensor is the output sensor, which monitors the output shaft speed.

Can a speed sensor stop a car from starting?

The only way a Vss can cause a no-start is if it is shorting the orange wire and pulling down the power to the Crank and cam sensors. The VSS cannot cause a no-crank.

How does vehicle speed sensor work?

How does the speed sensor work? The vehicle speed sensor measures the rotational speed of the gears in your transmission system. Then, it converts this measurement into an analog signal or a low voltage square wave signal and relays it to electronic control units (ECUs) inside your car.

What does DTC severity mean?

Diagnostic Trouble Code

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