Cylinder 4 Deactivation/Intake Valve Control Circuit High

Where it lives

For P3428, the valve sits on the circuit this code reports. The description of P3428 puts it on cylinder 4.

Check these first

• A short to voltage on the cylinder 4 intake valve control circuit
• An open ground at the cylinder 4 intake valve control solenoid
• A failed cylinder 4 intake valve control solenoid
• A failed driver in the control module for the cylinder 4 intake valve circuit
• A chafed cylinder 4 intake valve control wire touching voltage

What to do next

1. Read the cylinder 4 intake valve control status on a scan tool
2. Command the cylinder 4 intake valve control solenoid on and off
3. Test the cylinder 4 intake valve control circuit for a short to voltage
4. Check the cylinder 4 intake valve control ground for continuity
5. Replace the cylinder 4 intake valve control solenoid if the circuit tests good
6. Clear the code and retest

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