What Does P3419 Mean?
The PCM detected a lower than expected voltage in the cylinder 3 intake valve deactivation control circuit. This indicates a potential short to ground or failed solenoid in the variable valve timing/cylinder deactivation system.
Common Causes
35%
Shorted or damaged wiring harness to cylinder 3 intake valve control solenoid
30%
Failed cylinder 3 intake valve control solenoid (internal short)
20%
Corroded or damaged electrical connector at solenoid
10%
PCM internal driver circuit failure
5%
Oil contamination or sludge affecting solenoid operation
Diagnostic Steps
1
Step 1: Visually inspect cylinder 3 intake valve control solenoid connector for corrosion, damage, or oil intrusion
2
Step 2: Disconnect solenoid connector and check resistance of solenoid (typically 5-12 ohms); compare to specification
3
Step 3: Check wiring harness for short to ground using multimeter between solenoid connector and ground
4
Step 4: Monitor live data for commanded vs actual valve control operation during activation cycles
5
Step 5: If all circuits test normal, perform PCM voltage supply test to solenoid circuit
Estimated Repair Cost
$150 - $600
Parts + labor, varies by vehicle and location
The PCM detected a lower than expected voltage in the cylinder 3 intake valve deactivation control circuit. This indicates a potential short to ground or failed solenoid in the variable valve timing/cylinder deactivation system.
The most common cause of P3419 (Cylinder 3 Deactivation/Intake Valve Control Circuit Low) is: Shorted or damaged wiring harness to cylinder 3 intake valve control solenoid
Typical repair costs for P3419 range from $150 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive but fuel economy and performance will be reduced. Cylinder deactivation system will not function properly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P3419 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
OBD2 Scanner
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