WOMS
P code powertrain High severity

P347A P347B P347C P347D P347E P347F ISO/SAE Reserved

The OBD2 codes P347A, P347B, P347C, P347D, P347E, and P347F are ISO/SAE reserved codes, meaning they are not currently defined for specific diagnostic trouble codes and are reserved for future use or...

Definition

The OBD2 codes P347A, P347B, P347C, P347D, P347E, and P347F are ISO/SAE reserved codes, meaning they are not currently defined for specific diagnostic trouble codes and are reserved for future use or manufacturer-specific applications

Common causes

  • Faulty variable valve timing (VVT) solenoid
  • VVT actuator malfunction
  • Timing chain/belt issues
  • Oil flow problems (low oil level or dirty oil)
  • Faulty camshaft or crankshaft position sensors
  • Electrical issues (wiring or connector problems)
  • Engine control module (ECM) software issues

Common misdiagnoses

  • Faulty camshaft position sensor
  • Faulty crankshaft position sensor
  • Timing chain/belt issues
  • Engine control module (ECM) failure
  • Wiring or connector issues
  • Vacuum leaks
  • Fuel delivery problems
  • Ignition system faults
  • Low oil pressure
  • Mechanical engine problems (e.g., valve timing 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 all codes can help in diagnosing the issue more effectively

  2. 2. Inspect the VVT System:

    Visual Inspection: Check the VVT actuator, solenoids, and associated wiring for any signs of damage, corrosion, or loose connections

  3. 3. Oil Condition

    Ensure that the engine oil is at the correct level and is clean. Old or contaminated oil can affect VVT operation

  4. 4. Check the Oil Flow:

    The VVT system relies on proper oil flow. Check for any blockages in the oil passages and ensure that the oil pump is functioning correctly

  5. 5. Test the VVT Actuator:

    If applicable, test the VVT actuator for proper operation. This may involve using a multimeter to check resistance or applying voltage to see if it responds correctly

  6. 6. Inspect the Timing Chain/Belt:

    Check the timing chain or belt for wear or misalignment. A stretched or damaged timing component can affect VVT operation

  7. 7. Check the Camshaft Position Sensors:

    Inspect the camshaft position sensors for proper operation. These sensors provide critical data to the engine control module (ECM) for VVT operation

  8. 8. Examine the Engine Control Module (ECM):

    Ensure that the ECM is functioning correctly and that there are no software issues. In some cases, a software update may be necessary

  9. 9. Clear Codes and Test Drive:

    After performing any repairs or inspections, clear the codes and take the vehicle for a test drive to see if the codes return

  10. 10. Seek Professional Help

  11. 11. If the issue persists after performing the above steps, it may be best to consult a professional mechanic or technician who has experience with your vehicle's specific VVT system.Note: Always ensure that you follow safety precautions when working on a vehicle, and if you're unsure about any step, it's best to consult a professional