Cylinder 2 Deactivation/Intake Valve Control Circuit Open
What does P3402 mean?
The P3402 code means the vehicle's onboard diagnostic system has detected: Cylinder 2 Deactivation/Intake Valve Control Circuit Open. This is a moderate severity code.
Common Symptoms
- Check Engine Light on
- Rough idle during cylinder deactivation
- Engine vibration
- Ticking noise from cylinder 2 area
- Fuel economy decrease
Probable Causes (Ranked by Likelihood)
- Failed cylinder 2 deactivation solenoid Very High
- Open circuit in the cylinder 2 solenoid wiring High
- Corroded connector at the solenoid Moderate
- ECM driver circuit fault for cylinder 2 Moderate
- Low oil pressure affecting solenoid operation Low
Step-by-Step Diagnostic Procedure
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Test the cylinder 2 deactivation solenoid resistance
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Inspect solenoid wiring and connector for damage or corrosion
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Verify power and ground at the solenoid
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Check engine oil level and pressure
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Replace the solenoid if electrically failed
Frequently Asked Questions
Is P3402 specific to cylinder 2?
Yes, P3402 specifically indicates the deactivation solenoid or circuit for cylinder 2 has an open circuit fault.
Can I replace just one solenoid?
Yes, you only need to replace the failed solenoid. However, some technicians recommend replacing all solenoids at the same time since they share similar wear.
Do I need to remove the valve cover to access the solenoid?
On most vehicles with cylinder deactivation, yes, the valve cover must be removed to access the deactivation solenoids mounted on the lifter trays.