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How to diagnose the vehicle using a scanner and how to repair fault code P0340 - camshaft position sensor A on a Kia Forte 2018-2022.

Table of Contents

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Possible Causes

  • Faulty Camshaft Position Sensor
  • Camshaft Position Sensor harness is damaged
  • Camshaft Position Sensor circuit open or shorted to ground
  • Starting system circuit
  • Defective ECU

Start by checking the causes listed above. Visually inspect the wiring harness and connector to the camshaft position sensor. Check for damaged components and look for broken, bent, pushed out pins. If no visible damage is present replace the camshaft position sensor.   

What you will need

Camshaft Position Sensor Replacement

  1. Connect the OBD-II scanner into the OBD-II port under the dashboard.The OBD-II port of the Kia Forte.
  2. Insert the key into the ignition switch and turn it to the accessories position.Inserting the key into the ignition switch.

     

  3. Go to the diagnostic menu on the scanner and select read codes.Going to the Diagnostic Menu on the Scanner.

     

    Selecting Read Codes on the Scanner.
  4. Check the stored codes, the scanner will show faulty code P0340 Camshaft Position Sensor A Circuit Bank 1.Selecting stored codes on the scanner.

     

    Faulty Code P0340 Camshaft Position Sensor A
  5. Pull the hood release under the dashboard and go to the vehicle's front.The hood release of the Kia Forte.

     

    Pulling the hood release of the Kia Forte.
  6. Press the tab to the left to unlock the hood latch. Then pull the hood up and set the hood strut to hold the hood.Unlocking the hood latch of the Kia Forte.

     

    Setting the hood strut to hold the hood.
  7. Remove the engine cover by pulling it up.Removing the engine cover of the Kia Forte.

     

  8. Locate the camshaft position sensor on the right side of the engine.The camshaft position sensor A of the Kia Forte.

     

  9. Disconnect the electrical connector of the camshaft position sensor by pressing the clip and pulling the connector out.Disconnecting the electrical connector of the camshaft position sensor.

     

  10. Remove the 10mm bolt on the sensor by turning it counterclockwise using a 10mm socket.Removing the 10mm bolt on the camshaft position sensor.

     

  11. Pull the camshaft position sensor out.Pulling the camshaft position sensor out.

     

  12. Line up the new/replacement camshaft position sensor and press it in to set it into place.Installing the new camshaft position sensor of the Kia Forte.

     

  13. Reinstall the 10mm bolt and reconnect the electrical connector to the camshaft position sensor.Reinstalling the 10mm bolt and reconnecting the connector of the camshaft position sensor.

     

  14. Reinstall the engine cover by lining it up back to the engine and pressing it in to lock it in its place.
  15. Turn the ignition switch to the accessories position again.
  16. Go back to the diagnostic menu and select erase codes on the scanner.Going to the erase codes on the scanner.

     

  17. Press enter on the scanner to erase the stored codes.Erasing the codes on the Scanner.

     

  18. Start the vehicle a few times and check if the check engine light is still on.Starting the vehicle to check the check engine light.