DTC P0708 Transmission Range Sensor Circuit High Input

DTC P0708 is an OBD-II trouble code indicating an issue within the Transmission Range Sensor (TRS) circuit that signifies a high input signal. This code triggers when the Powertrain Control Module (PCM) detects a higher than expected voltage signal from the transmission range sensor.

1. What does P0708 code mean?

DTC P0708 specifically points to a high input signal in the transmission range sensor circuit. It indicates that the signal voltage received by the PCM is beyond the specified range or higher than expected.

2. What are the causes of DTC P0708?

The potential causes of DTC P0708 include:

  • Faulty Transmission Range Sensor: A malfunctioning or defective transmission range sensor.
  • Wiring or Connector Issues: Corrosion, damage, disconnection, or short circuits in the wiring harness or connectors linked to the transmission range sensor.
  • Sensor Alignment: Improper alignment or installation of the transmission range sensor.

3. What are the symptoms of DTC P0708?

Symptoms related to DTC P0708 may include:

  • Check Engine Light: Illumination of the Check Engine Light due to the detected high input signal issue.
  • Erratic Gear Indication: Incorrect gear display on the dashboard or instrument cluster.
  • Transmission Operation Problems: Issues with transmission operation, such as harsh shifting, failure to engage the correct gear, or transmission slippage.

4. How to diagnose DTC P0708?

Diagnosing DTC P0708 typically involves these steps:

  • OBD-II Scan: Utilize an OBD-II scanner to retrieve the trouble code and relevant data.
  • Visual Inspection: Inspect the transmission range sensor, wiring, and connectors for physical damage, corrosion, or disconnection.
  • Sensor Alignment Check: Verify proper alignment and mounting of the transmission range sensor.
  • Circuit Testing: Use a multimeter to test voltage, resistance, and continuity within the Transmission Range Sensor Circuit.

5. How to fix DTC P0708 problem?

Steps to address DTC P0708 might include:

  • Repair or Replace Faulty Components: Rectify damaged wiring, connectors, or a malfunctioning transmission range sensor identified during inspection.
  • Clear Codes: After fixing the issue, clear the trouble codes using an OBD-II scanner to reset the Check Engine Light.
  • Professional Assistance: Seek help from a certified mechanic for complex sensor or wiring issues or for further diagnosis and repair.


DTC P0708, indicating a high input signal within the Transmission Range Sensor Circuit, requires a comprehensive inspection and potential replacement or repair of components to ensure accurate gear indication and proper transmission functionality.