Cylinder 5 Deactivation/Intake Valve Control Circuit Open
What does P3405 mean?
The P3405 code means the vehicle's onboard diagnostic system has detected: Cylinder 5 Deactivation/Intake Valve Control Circuit Open. This is a moderate severity code.
Common Symptoms
- Check Engine Light on
- Vibration during deactivation mode
- Rough idle
- Engine noise from cylinder 5 area
- Decreased fuel economy
Probable Causes (Ranked by Likelihood)
- Failed cylinder 5 deactivation solenoid Very High
- Open wiring in the cylinder 5 solenoid circuit High
- Corroded connector at the solenoid Moderate
- ECM driver circuit issue Moderate
- Oil sludge restricting solenoid operation Low
Step-by-Step Diagnostic Procedure
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Measure cylinder 5 deactivation solenoid resistance
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Inspect wiring and connector for open circuits or corrosion
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Command the solenoid on and off with a scan tool to verify operation
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Check engine oil condition and level
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Replace the solenoid if it has failed
Frequently Asked Questions
Is cylinder 5 commonly deactivated?
Whether cylinder 5 is part of the deactivation group depends on the engine design. Some manufacturers deactivate different cylinder combinations. Check your service manual for specifics.
Can I use a scan tool to test the solenoid?
Yes, most professional scan tools can command individual deactivation solenoids on and off, which helps confirm whether the solenoid responds electrically.
What type of oil should I use with cylinder deactivation?
Always use the oil specification recommended by the manufacturer. Many vehicles with cylinder deactivation require Dexos1 (GM) or specific grades. Using the wrong oil can cause deactivation issues.