Common questions

What can cause a transmission speed sensor to go bad?

What can cause a transmission 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.

What is the name of the transmission speed sensor?

There are generally two speed sensors that work in conjunction to provide accurate transmission data to the vehicle’s powertrain control module. The first is known as the input shaft speed (ISS) sensor. As described, this sensor is used to monitor the speed of the transmission’s input shaft. The other sensor is the output shaft speed (OSS) sensor.

Which is the output shaft speed ( OSS ) sensor?

The first is known as the input shaft speed (ISS) sensor. As described, this sensor is used to monitor the speed of the transmission’ input shaft. The other sensor is the output shaft speed (OSS) sensor.

Can a bad speed sensor affect shift timing?

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. This may cause the transmission to shift roughly or more quickly than normal. It’s also common that a problem with these sensors can impact the shift timing,…

What happens when a transmission speed sensor goes out of alignment?

If either of these two sensors falls out of alignment or experiences electrical issues, it impacts the operation of the entire transmission.

Can a transmission speed sensor be replaced at the same time?

The same removal and installation instructions apply for both the input and output speed sensor. CAUTION: When replacing the new speed sensor be sure the O-ring on the new sensor is correctly fitted on the sensor before installation. Note: Input and output speed sensors are not interchangeable.

Where is the transmission input speed sensor located?

Users have reported p0715 for the following makes: Mercedes Benz (especially on a Mercedes Benz ML320), Ford, Nissan, Mazda, and Mitsubishi. An input speed sensor reads a reluctor ring. Located on or inside your vehicle’s transmission, the sensor is tasked to monitor your vehicle’s transmission input speed.

What happens when the output shaft speed sensor falls out?

The other sensor is the output shaft speed (OSS) sensor. If either of these two sensors falls out of alignment or experiences electrical issues, it impacts the operation of the entire transmission.

How much does it cost to replace a speed sensor?

After an OBD II scan you learn that your input or output vehicle speed sensor (VSS) has malfunctioned and needs to be replaced. You can take your car to the repair shop or dealership and spend between $100 and $250 or more to have one speed sensor replaced or you can replace the sensor yourself for a fraction of the cost.

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Ruth Doyle