The most likely cause of the P0708 code is a faulty transmission range sensor, or a problem with the wiring or connections to the sensor. When the sensor fails, the PCM cannot determine the position of the gear selector and may cause the transmission to shift erratically or not at all.
Other potential causes of the P0708 code include:
- Faulty Neutral Safety Switch
- Transmission Fluid Level Too Low
- Faulty Transmission Control Module (PCM)
- Wiring or connection issues
Location:
The transmission range sensor is located on the side of the transmission, near the gear selector. It is usually held in place by a few bolts and can be accessed by removing the undercarriage cover.