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P2347 Turbocharger/Supercharger Boost Control 'A' Range/Performance Problem

The OBD2 code P2347 indicates a problem with the performance or range of the turbocharger or supercharger boost control system, suggesting that the boost pressure is not within the expected parameters

Definition

The OBD2 code P2347 indicates a problem with the performance or range of the turbocharger or supercharger boost control system, suggesting that the boost pressure is not within the expected parameters

Common causes

  • Faulty turbocharger or supercharger
  • Boost pressure sensor malfunction
  • Vacuum leaks in the intake system
  • Faulty wastegate or wastegate actuator
  • Clogged or restricted intake or exhaust
  • Faulty engine control module (ECM)
  • Wiring or connector issues in the boost control circuit
  • Faulty throttle position sensor
  • Incorrectly calibrated or malfunctioning boost control solenoid
  • Engine mechanical issues (e.g., worn piston rings, valve problems)

Common misdiagnoses

  • Faulty turbocharger/supercharger
  • Boost pressure sensor issues
  • Vacuum leaks
  • Wastegate problems
  • Intercooler leaks
  • Air intake restrictions
  • Engine control module (ECM) faults
  • Fuel delivery issues
  • Exhaust restrictions
  • Ignition system 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 the Turbocharger/Supercharger

  3. 3. Visually inspect the turbocharger or supercharger for any signs of damage, wear, or leaks

  4. 4. Check the wastegate (if applicable) for proper operation and ensure it is not stuck open or closed

  5. 5. Examine the Boost Control System

  6. 6. Inspect the boost control solenoid and its wiring for any damage or disconnections

  7. 7. Ensure that the boost control solenoid is functioning correctly. You may need to test it with a multimeter or replace it if it is faulty

  8. 8. Check Vacuum Lines and Hoses

  9. 9. Inspect all vacuum lines and hoses connected to the turbocharger/supercharger system for cracks, leaks, or disconnections

  10. 10. Replace any damaged or leaking hoses

  11. 11. Inspect the Intake System

  12. 12. Check the intake manifold and associated components for leaks or blockages

  13. 13. Ensure that the air filter is clean and not obstructing airflow

  14. 14. Examine the MAP/MAF Sensors

  15. 15. Check the Manifold Absolute Pressure (MAP) sensor or Mass Air Flow (MAF) sensor for proper operation. Clean or replace them if necessary

  16. 16. Ensure that the sensors are properly connected and that their wiring is intact

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

  18. 18. Inspect the ECM for any signs of damage or corrosion

  19. 19. Ensure that the ECM is receiving the correct signals from the sensors and is functioning properly

  20. 20. Test the Turbocharger/Supercharger Performance

  21. 21. If possible, perform a boost pressure test to ensure that the turbocharger/supercharger is producing the correct amount of boost

  22. 22. Compare the readings to the manufacturer's specifications

  23. 23. Inspect the Exhaust System

  24. 24. Check for any restrictions in the exhaust system that could affect turbocharger performance, such as a clogged catalytic converter

  25. 25. Clear Codes and Test Drive

  26. 26. After performing the necessary repairs or inspections, clear the trouble codes using the OBD-II scanner

  27. 27. Take the vehicle for a test drive to see if the code reappears. 1

  28. 28. Consult a Professional

  29. 29. If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician who has experience with turbocharged or supercharged systems. By following these troubleshooting steps, you can identify and potentially resolve the issue related to the P2347 code. Always refer to the vehicle's service manual for specific procedures and specifications