Cylinder 6 Deactivation/Exhaust Valve Control Circuit Open
What does P3414 mean?
The P3414 code means the vehicle's onboard diagnostic system has detected: Cylinder 6 Deactivation/Exhaust Valve Control Circuit Open. This is a moderate severity code.
Common Symptoms
- Check Engine Light on
- Engine vibration during deactivation
- Rough running at cruise
- Exhaust note irregularity
- Decreased fuel economy
Probable Causes (Ranked by Likelihood)
- Failed cylinder 6 exhaust deactivation solenoid Very High
- Open circuit in solenoid wiring High
- Corroded solenoid connector Moderate
- ECM driver circuit fault Moderate
- Exhaust lifter mechanical issue Low
Step-by-Step Diagnostic Procedure
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Measure cylinder 6 exhaust solenoid resistance
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Inspect wiring for open circuits
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Check connector for corrosion or damage
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Actuate solenoid with scan tool to verify operation
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Replace solenoid or lifter as determined by testing
Frequently Asked Questions
Are P3400 series codes only found on American vehicles?
P3400 series deactivation codes are most commonly associated with GM AFM and Chrysler MDS engines, but Honda VCM systems can also trigger related codes. They are less common on other brands.
Can an oil change fix a deactivation code?
If the issue is caused by dirty oil restricting flow to the solenoid, a fresh oil change with the correct specification may resolve the code. However, if the solenoid or lifter has failed, an oil change alone will not fix it.
What is the cost to delete the AFM system entirely?
A complete AFM delete including a kit, new camshaft, lifters, and professional installation typically costs $1500 to $3000. A simple electronic disable via tuner is less expensive at $300 to $500.