What Does P3418 Mean?
The PCM detects that cylinder 3's intake valve control system is not performing within expected parameters. The electrical circuit is functional but the mechanical or hydraulic response is outside acceptable limits.
Common Causes
30%
Low engine oil level or improper oil viscosity affecting hydraulic valve control
25%
Clogged or restricted oil passages to cylinder 3 intake valve actuator
20%
Worn or sticking intake valve control solenoid with degraded performance
15%
Mechanical wear or failure in valve control actuator or camshaft phaser
10%
Engine oil contamination or sludge buildup in valve control system
Diagnostic Steps
1
Step 1: Check engine oil level and condition; ensure correct viscosity oil is used per manufacturer recommendations
2
Step 2: Use scan tool to monitor cylinder 3 intake valve control commanded vs. actual position in real-time
3
Step 3: Remove cylinder 3 intake valve control solenoid and inspect for debris, varnish buildup, or mechanical damage
4
Step 4: Test solenoid operation by applying direct battery voltage and verifying smooth actuation
5
Step 5: If solenoid is functional, inspect oil control passages and valve actuator mechanism for restrictions or wear
Estimated Repair Cost
$200 - $1,200
Parts + labor, varies by vehicle and location
The PCM detects that cylinder 3's intake valve control system is not performing within expected parameters. The electrical circuit is functional but the mechanical or hydraulic response is outside acceptable limits.
The most common cause of P3418 (Cylinder 3 Deactivation/Intake Valve Control Circuit Performance) is: Low engine oil level or improper oil viscosity affecting hydraulic valve control
Typical repair costs for P3418 range from $200 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive but may experience rough idle, hesitation, and reduced fuel economy. Repair promptly to avoid potential engine damage from improper valve timing.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P3418 to identify the root cause.
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Quick Info
Category
Powertrain
System
Variable Valve Timing/Cylinder Deactivation System
Difficulty
Type
Generic (SAE)
Recommended Tools
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