Do you have an ABS warning light on as well? If so these system share data so you might have an wheel speed sensor causing this issue. Also, how was the transmission working before this warning light came on? I have seen the transmission go out and cause this code that is why I am asking.
The P0720 code means the TCM (Transmission Control Module) is not receiving a valid signal from the Vehicle Speed Sensor (VSS) / Output Speed Sensor.
I would check the transmission fluid to see if it is burnt or low, if everything looks okay let try replacing the sensor and then clear the codes. Here is the location so you can check it out. Check out the images (below). Please let us know what happens.
Image (Click to make bigger)
Monday, January 26th, 2026 AT 8:15 AM