The P0708 trouble code indicates that the Transmission Range Sensor A Circuit is registering a high input. This sensor, also known as the PRNDL (Park, Reverse, Neutral, Drive, Low) sensor, is responsible for detecting the gearshift lever position and transmitting that information to the vehicle’s engine control module (ECM) or transmission control module (TCM). The high input signal suggests that the voltage in the circuit is above the specified threshold.
P0708 Transmission Range Sensor A Circuit High Input
Code symptoms P0708.
1. Check Engine Light (CEL) illuminated on the dashboard.
2. Difficulty starting the vehicle.
3. Inability to shift gears or erratic shifting behavior.
4. Incorrect gear indicator display on the instrument panel.
5. Loss of power or engine stalling while driving.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0708.
1. Faulty transmission range sensor.
2. Wiring or connector issues in the transmission range sensor circuit.
3. Corrosion or poor electrical connections in the circuitry.
4. Misalignment or improper installation of the transmission range sensor.
5. Internal ECM or TCM failure.
Code Solutions P0708.
1. Use a diagnostic scanner to retrieve freeze frame data and all associated trouble codes. This information can help pinpoint the root cause of the high input signal from the transmission range sensor.
2. Inspect the wiring harness and connectors in the transmission range sensor circuit for any signs of damage or corrosion. Repair or replace damaged components as needed.
3. Test the transmission range sensor for proper operation using a multimeter or scan tool. Replace the sensor if it is faulty.
4. Check for proper alignment and installation of the transmission range sensor. Incorrect installation can lead to sensor malfunctions.
5. Clear the trouble codes from the vehicle’s memory and perform a test drive to verify that the issue has been resolved. If the code returns, further diagnosis may be necessary to identify the underlying problem.