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 I know if my transmission speed sensor is bad?

The following signs will show you if your transmission speed sensor has failed.

  1. Cruise Control Fails. The main function of the speed sensors is to monitor the output and input shaft speed. …
  2. Improper Or Harsh Shifting. …
  3. The Check Engine Light Indicates.

What happens when a transmission speed sensor goes bad?

Therefore, a failing speed sensor will have a direct impact on automatic transmission operation. One of the most common signs of a bad speed sensor is abnormal automatic transmission operation. If the VSS is faulty, the transmission may exhibit symptoms such as delayed shifts, hard shifts, and limited gear operation.

Is there a way to test a speed sensor?

You can test your VSS to make sure it’s functioning properly by using a device called a multimeter. Start by disconnecting and removing the VSS from your engine so you can test it. You can then connect it to a multimeter and set the multimeter to the AC setting.

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How much does it cost to replace a transmission speed sensor?

VSS Replacement



The DIY cost for replacing a speed sensor is the cost of the sensor. Depending on the vehicle year, make and model, a speed sensor can cost as little as $7.92 or as much as $100. For most vehicles, the cost for a speed sensor is between $25 and $45.

How many ohms should a speed sensor read?

The typical reading for a passive wheel speed sensor is between 1,000 and 2,500 ohms. This is a normal range for all passive sensors. The specification for active sensors is between 1,000 and 2,500 ohms.

Can you drive with a bad 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.

Can a transmission speed sensor be cleaned?

The transmission speed sensor measures the RPMs of the shaft of the transmission. … In this case, the sensor may not have to be replaced as the sensor can be cleaned off. Yet, only a mechanic should make that determination because there may be damage to the electrical part of the sensor.

What does a speed sensor do on a transmission?

The speed sensor detects a gear or target wheel in the transmission and generates an electric digital signal proportional to the speed of rotation. The transmission controls use this information to modify various transmission functions such as shift points and perform diagnostic tests.

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