P3473 Cylinder 10 Deactivation/Intake Valve Control Circuit/Open

Definition

Common causes

• Faulty intake valve control solenoid
• Open or shorted wiring in the control circuit
• Poor electrical connections
• Failed engine control module (ECM)
• Faulty camshaft or timing chain/belt
• Blocked or restricted intake passages
• Malfunctioning variable valve timing (VVT) system

Common misdiagnoses

• Faulty intake valve actuator
• Wiring issues or shorts in the circuit
• Engine control module (ECM) failure
• Faulty camshaft or timing issues
• Vacuum leaks
• Faulty fuel injectors
• Low oil pressure
• Faulty crankshaft position sensor
• Ignition system problems
• Other cylinder deactivation system faults

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 10. Look for signs of damage, corrosion, or loose connections

3. 3. Pay special attention to the wiring harness that runs to the intake valve actuator

4. 4. Test the Intake Valve Actuator

   If accessible, test the intake valve actuator for cylinder 10. This may involve checking the resistance of the actuator coil and ensuring it operates correctly when commanded

5. 5. If the actuator is faulty, it may need to be replaced

6. 6. Check for Vacuum Leaks

   Inspect the intake manifold and associated vacuum lines for any leaks that could affect the operation of the cylinder deactivation system

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

   Ensure that the ECM is functioning properly. A malfunctioning ECM can cause incorrect signals to be sent to the intake valve actuator

8. 8. Check for any software updates or reprogramming that may be available for the ECM

9. 9. Test the Power and Ground Supply

   Use a multimeter to check for proper voltage and ground at the intake valve actuator connector. Ensure that the actuator is receiving the correct signals from the ECM

10. 10. Check for Mechanical Issues

    Inspect the engine for any mechanical issues that could affect cylinder 10, such as valve sticking, carbon buildup, or other internal engine problems

11. 11. Clear Codes and Test Drive

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

12. 12. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the P3473 code for your specific vehicle make and model. Manufacturers may have issued guidance or fixes for known issues

13. 13. Seek Professional Help

    If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or technician who has experience with your vehicle's specific engine and systems. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the P3473 code