WOMS
P code powertrain Medium severity

P228A Air Intake Valve Control Range/Performance Problem

The OBD2 code P228A indicates a problem with the air intake valve control, specifically that the valve is not operating within the expected range or performance parameters

Definition

The OBD2 code P228A indicates a problem with the air intake valve control, specifically that the valve is not operating within the expected range or performance parameters

Common causes

  • Faulty air intake valve
  • Wiring issues or damaged connectors
  • Vacuum leaks
  • Faulty engine control module (ECM)
  • Faulty throttle body
  • Clogged air filter
  • Malfunctioning sensors (e.g., MAP or MAF sensor)
  • Carbon buildup in the intake system

Common misdiagnoses

  • Faulty Mass Air Flow (MAF) Sensor
  • Vacuum Leaks
  • Throttle Body Issues
  • Faulty Intake Air Temperature (IAT) Sensor
  • EGR Valve Problems
  • Fuel Delivery Issues
  • Engine Control Module (ECM) Malfunction
  • Wiring or Connector 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. Addressing related codes can help pinpoint the issue

  2. 2. Inspect the Air Intake System

  3. 3. Check for any vacuum leaks in the intake system, including hoses and gaskets

  4. 4. Inspect the air intake valve and its actuator for any signs of damage or wear

  5. 5. Examine Electrical Connections

  6. 6. Inspect the wiring and connectors related to the air intake valve for corrosion, damage, or loose connections

  7. 7. Ensure that the electrical connector to the air intake valve is securely attached

  8. 8. Test the Air Intake Valve

  9. 9. If possible, manually test the air intake valve to see if it opens and closes properly

  10. 10. Use a multimeter to check the resistance of the valve's actuator to ensure it is within specifications

  11. 11. Check the Throttle Body

  12. 12. Inspect the throttle body for carbon buildup or obstructions that could affect airflow

  13. 13. Clean the throttle body if necessary, as buildup can impact performance

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

  15. 15. Ensure that the ECM is functioning correctly and is not causing the issue due to a software glitch

  16. 16. Check for any updates or recalls related to the ECM

  17. 17. Test the Sensors

  18. 18. Check related sensors, such as the Mass Air Flow (MAF) sensor or Manifold Absolute Pressure (MAP) sensor, for proper operation

  19. 19. Ensure that these sensors are providing accurate readings to the ECM

  20. 20. Perform a Visual Inspection

  21. 21. Look for any signs of physical damage to the intake manifold or air intake components

  22. 22. Check for any signs of oil or coolant leaks that could affect performance

  23. 23. Clear Codes and Test Drive

  24. 24. After performing any repairs or adjustments, clear the trouble codes and take the vehicle for a test drive to see if the code returns

  25. 25. Consult Repair Manual

    If the issue persists, refer to the vehicle's service manual for specific diagnostic procedures and specifications related to the air intake system. If you are not comfortable performing these steps or if the problem persists after your troubleshooting, it may be best to consult a professional mechanic for further diagnosis and repair