WOMS
P code powertrain High severity

P3428 Cylinder 4 Deactivation/Intake Valve Control Circuit High

The OBD2 code P3428 indicates that there is a high voltage signal detected in the intake valve control circuit for cylinder 4, which is related to the cylinder deactivation system

Definition

The OBD2 code P3428 indicates that there is a high voltage signal detected in the intake valve control circuit for cylinder 4, which is related to the cylinder deactivation system

Common causes

  • Faulty intake valve control solenoid
  • Wiring issues or damaged connectors
  • Faulty engine control module (ECM)
  • Vacuum leaks
  • Faulty camshaft or timing issues
  • Low oil pressure
  • Faulty valve lifters or rocker arms

Common misdiagnoses

  • Faulty camshaft or timing issues
  • Bad intake valve actuator
  • Wiring or connector issues
  • Faulty engine control module (ECM)
  • Vacuum leaks
  • Low oil pressure
  • Faulty oil control valve
  • Misfiring or ignition system problems
  • Fuel delivery issues
  • Exhaust system restrictions

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 intake valve control for cylinder 4. Look for signs of damage, corrosion, or loose connections

  3. 3. Pay special attention to the wiring harness that connects to the VVT solenoid or actuator for cylinder 4

  4. 4. Test the VVT Solenoid/Actuator

    If applicable, test the VVT solenoid or actuator for cylinder 4. This may involve checking the resistance of the solenoid and ensuring it operates correctly when commanded

  5. 5. You can also apply direct battery voltage to the solenoid to see if it activates

  6. 6. Check Engine Oil Level and Condition

    Ensure that the engine oil is at the correct level and in good condition. Low oil levels or dirty oil can affect the operation of the VVT system

  7. 7. Inspect the Timing Chain/Belt

    Check the timing chain or belt for proper alignment and tension. A misaligned or worn timing component can affect valve timing and lead to issues with cylinder deactivation

  8. 8. Test the PCM (Powertrain Control Module)

    If all other components check out, the issue may lie with the PCM. Check for software updates or reprogramming that may be necessary

  9. 9. Ensure that the PCM is receiving the correct signals from the sensors and is able to control the VVT system properly

  10. 10. Check for Vacuum Leaks

    Inspect the intake system for any vacuum leaks that could affect the operation of the intake valves

  11. 11. Perform a Visual Inspection of the Engine

    Look for any obvious signs of mechanical issues, such as a damaged camshaft or valve train components

  12. 12. Clear Codes and Test Drive

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

  13. 13. 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 the specific make and model of your vehicle. By following these troubleshooting steps, you can systematically identify and resolve the issue associated with the P3428 code