Cylinder 2 Deactivation/Intake Valve Control Circuit Low
The P3411 code indicates a low voltage condition in the circuit that controls the cylinder deactivation and intake valve for cylinder 2. This system, often found in engines with Active Fuel Management (AFM) or Variable Valve Timing (VVT), uses solenoids to disable cylinder 2 under light load to improve fuel economy. A low circuit condition means the engine control module (ECM) detects voltage below the expected threshold, which can prevent proper valve operation, leading to misfires, reduced performance, and potential engine damage if ignored.
1. Most Common Causes
- Faulty cylinder deactivation solenoid for cylinder 2
- Open or shorted wiring in the solenoid circuit
- Poor electrical connection at the solenoid or ECM
- Failed ECM (rare)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine misfire or rough idle
- Reduced fuel economy
- Loss of power or hesitation
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect the wiring and connector for cylinder 2 deactivation solenoid for damage or corrosion.
Step 3: Test the solenoid resistance with a multimeter (specs vary; typically 10-30 ohms).
Step 4: Check for voltage at the solenoid connector with the engine running (should be battery voltage).
Step 5: If wiring and solenoid are good, test the ECM output or replace the solenoid.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances. The low circuit can cause cylinder 2 to misfire, leading to catalytic converter damage and reduced engine performance. Have it diagnosed promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and replacement of the solenoid, plus labor. If wiring repair is needed, costs may be higher.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.