1. Identify the Transmission Range Sensor:
- Locate the transmission range sensor on your Hyundai Sonata. It is usually situated on the side of the transmission, near the shifter.
2. Check Wiring Connections:
- Inspect the wiring harness connected to the transmission range sensor. Look for any loose, damaged, or corroded wires. Make sure all the connections are secure.
3. Test the Sensor:
- Disconnect the electrical connector from the transmission range sensor.
- Use a multimeter to test the sensor for continuity. Check the resistance between the sensor terminals as you move the shifter through different positions.
- Compare the measured resistance values with the specified values in the Hyundai Sonata repair manual.
4. Replace the Sensor:
- If the sensor is faulty or damaged, replace it with a new one.
- Ensure the new sensor is securely installed and connected to the electrical connector.
5. Clear the Trouble Code:
- Use an OBD-II scan tool to clear the P0705 trouble code from the vehicle's computer.
6. Re-test the System:
- Start the engine and shift through the transmission positions. Verify that the PRNDL indicator on the instrument cluster accurately displays the selected gear.
7. Road Test:
- Take the Hyundai Sonata for a test drive and check if the transmission shifts smoothly. Ensure there are no abnormal shifts or warning lights illuminated.
If the P0705 code persists or the transmission continues to malfunction, further diagnosis by a qualified mechanic or transmission specialist may be necessary.
