WOMS
P code powertrain High severity

P3472 Cylinder 9 Exhaust Valve Control Circuit High

The OBD2 code P3472 indicates that there is a high voltage signal detected in the exhaust valve control circuit for cylinder 9, which may suggest a malfunction in the valve control system or related components

Definition

The OBD2 code P3472 indicates that there is a high voltage signal detected in the exhaust valve control circuit for cylinder 9, which may suggest a malfunction in the valve control system or related components

Common causes

  • Faulty exhaust valve control solenoid
  • Wiring issues (shorts or open circuits)
  • Poor electrical connections
  • Faulty engine control module (ECM)
  • Stuck or damaged exhaust valve
  • Vacuum leaks
  • Faulty camshaft or timing issues

Common misdiagnoses

  • Faulty camshaft position sensor
  • Faulty engine control module (ECM)
  • Wiring issues or shorts in the harness
  • Faulty exhaust valve actuator
  • Vacuum leaks
  • Faulty intake manifold runner control
  • Low oil pressure
  • Faulty timing chain or belt
  • Misfiring cylinders or ignition issues
  • Fuel delivery problems

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. This can provide more context and help identify related issues

  2. 2. Inspect Wiring and Connectors

    Visually inspect the wiring and connectors associated with the exhaust valve control circuit for cylinder 9. Look for

  3. 3. Damaged, frayed, or corroded wires

  4. 4. Loose or disconnected connectors

  5. 5. Signs of short circuits or grounding issues

  6. 6. Test the Valve Actuator

    If applicable, test the exhaust valve actuator for cylinder 9. This may involve

  7. 7. Checking the resistance of the actuator coil

  8. 8. Applying voltage directly to the actuator to see if it operates correctly

  9. 9. Check the Power and Ground

    Use a multimeter to check for proper voltage and ground at the actuator connector. Ensure that

  10. 10. The power supply is within the specified range

  11. 11. The ground connection is solid and free of corrosion

  12. 12. Inspect the Engine Control Module (ECM)

    Check for any issues with the ECM that could affect the control of the exhaust valve. This may include

  13. 13. Software updates or reprogramming

  14. 14. Checking for internal faults in the ECM

  15. 15. Look for Mechanical Issues

    Inspect the engine for any mechanical issues that could affect the exhaust valve operation, such as

  16. 16. Sticking or damaged valves

  17. 17. Timing chain/belt issues that could affect valve timing

  18. 18. Clear Codes and Test Drive

    After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner. Take the vehicle for a test drive to see if the code returns

  19. 19. Seek Professional Help

    If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician who has experience with your specific vehicle make and model. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the P3472 code