Code po715

It looks like it is inside the transmission on the valve body, here is a guide that will give you an idea of what you must do to get at the sensor.

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Here are some diagrams of its location in your car, (below)

They call it an RPM sensor.

Please let us know what you find.

Cheers, Ken