WOMS
P code powertrain Medium severity

P1522 Variable Intake Solenoid #2 Circuit Malfunction

The OBD2 code P1522 indicates a malfunction in the circuit of the variable intake solenoid #2, which is responsible for controlling the intake manifold's variable geometry to optimize engine performance

Definition

The OBD2 code P1522 indicates a malfunction in the circuit of the variable intake solenoid #2, which is responsible for controlling the intake manifold's variable geometry to optimize engine performance

Common causes

  • Faulty variable intake solenoid
  • Wiring issues (shorts, opens, or corrosion)
  • Poor electrical connections
  • Failed engine control module (ECM)
  • Vacuum leaks
  • Blocked intake manifold passages
  • Faulty sensors related to the intake system

Common misdiagnoses

  • Faulty Variable Intake Solenoid
  • Wiring issues or shorts in the circuit
  • Faulty Engine Control Module (ECM)
  • Vacuum leaks
  • Throttle body issues
  • Intake manifold problems
  • Faulty sensors (e.g., MAP or MAF sensors)
  • Fuel delivery issues
  • Ignition system problems
  • Mechanical issues with the engine (e.g., timing problems)

Troubleshooting steps

  1. 1. Check the Vehicle's Service Manual

    Refer to the specific service manual for your vehicle to understand the exact function of the variable intake solenoid and its circuit. This will provide you with wiring diagrams and specifications

  2. 2. Visual Inspection

    Wiring and Connectors: Inspect the wiring harness and connectors associated with the variable intake solenoid. Look for signs of damage, corrosion, or loose connections

  3. 3. Solenoid Condition

    Check the solenoid itself for any physical damage or signs of wear

  4. 4. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. Sometimes, multiple codes can provide more context for the issue

  5. 5. Test the Solenoid

    Resistance Test: Disconnect the solenoid and use a multimeter to measure its resistance. Compare the reading to the specifications in the service manual. If it’s out of range, the solenoid may be faulty

  6. 6. Power and Ground

    Check for proper voltage and ground at the solenoid connector while the engine is running. You can use a multimeter to verify that the solenoid is receiving the correct voltage

  7. 7. Check the Engine Control Module (ECM)

    Ensure that the ECM is functioning properly. If the ECM is not sending the correct signals to the solenoid, it may cause a malfunction. This may require specialized diagnostic equipment

  8. 8. Inspect Related Components

    Check other components related to the intake system, such as the intake manifold, throttle body, and any associated sensors (like the MAP or MAF sensors) for issues that could affect the solenoid's operation

  9. 9. Clear Codes and Test Drive

    After performing any repairs or adjustments, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns

  10. 10. Consult a Professional

    If the issue persists after performing these 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 ensure that you are working in a safe environment and take necessary precautions when working on your vehicle. - Document any changes or repairs made during the troubleshooting process for future reference. By following these steps, you should be able to identify the cause of the P1522 code and take appropriate action to resolve the issue