WOMS
P code powertrain Medium severity

P3487 Cylinder 11 Exhaust Valve Control Circuit Low

The OBD2 code P3487 indicates a low voltage or malfunction in the exhaust valve control circuit for cylinder 11, which may affect the operation of the variable valve timing system

Definition

The OBD2 code P3487 indicates a low voltage or malfunction in the exhaust valve control circuit for cylinder 11, which may affect the operation of the variable valve timing system

Common causes

  • Faulty exhaust valve control solenoid
  • Wiring issues (shorts, opens, or corrosion)
  • Poor electrical connections
  • Faulty engine control module (ECM)
  • Malfunctioning camshaft or timing issues
  • Blocked or restricted exhaust system
  • Faulty valve lifters or rocker arms

Common misdiagnoses

  • Faulty camshaft or timing issues
  • Faulty VVT (Variable Valve Timing) solenoid
  • Wiring or connector issues
  • Faulty engine control module (ECM)
  • Low oil pressure
  • Faulty exhaust valve
  • Vacuum leaks
  • Faulty intake manifold runner control
  • Other cylinder misfire codes
  • Fuel delivery issues

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 the Wiring and Connectors

    Visually inspect the wiring and connectors associated with the exhaust valve control circuit for cylinder 11. 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 Exhaust Valve Control Solenoid

    If the vehicle is equipped with a solenoid that controls the exhaust valve, test its operation

  7. 7. Disconnect the solenoid and check its resistance with a multimeter. Compare the reading to the manufacturer's specifications

  8. 8. If the solenoid is not functioning properly, it may need to be replaced

  9. 9. Check the Power and Ground Supply

    Ensure that the solenoid is receiving the correct voltage and ground signal

  10. 10. Use a multimeter to check for voltage at the solenoid connector while the engine is running

  11. 11. Check for a good ground connection

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

    The ECM controls the operation of the exhaust valve. If there is a fault in the ECM, it may not send the correct signals to the solenoid

  13. 13. Check for any software updates or reprogramming that may be needed

  14. 14. In some cases, the ECM may need to be replaced if it is determined to be faulty

  15. 15. Check for Mechanical Issues

    Inspect the engine for any mechanical issues that could affect the operation of the exhaust valve

  16. 16. Check for carbon buildup or debris that may be obstructing the valve

  17. 17. Ensure that the timing chain/belt is in good condition and properly aligned

  18. 18. Clear the Codes and Test Drive

    After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner

  19. 19. Take the vehicle for a test drive to see if the code returns. Monitor the engine performance and any related symptoms

  20. 20. Consult a Professional

    If the issue persists after performing these troubleshooting steps, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle make and model.Additional Tips: - Always refer to the vehicle's service manual for specific diagnostic procedures and specifications. - Safety first: Ensure the vehicle is in a safe condition to work on, and take necessary precautions when working with electrical components. By following these steps, you should be able to identify and address the cause of the P3487 code