Cylinder 2 Deactivation/Intake Valve Control Circuit Low
The P3411 code indicates that the powertrain control module (PCM) has detected a low voltage condition in the circuit that controls the cylinder deactivation or intake valve control for cylinder 2. This system is commonly found in engines with Active Fuel Management (AFM) or Dynamic Fuel Management (DFM), such as GM's V8 engines. The low voltage signal suggests a short to ground, open circuit, or faulty component in the solenoid or wiring.
01. Most Common Causes
- Faulty cylinder deactivation solenoid on cylinder 2
- Open or shorted wiring in the valve control circuit
- Corroded or damaged connector at the solenoid
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine misfire or rough idle
- Reduced fuel economy
- Loss of power or hesitation
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all codes and freeze frame data.
Step 2: Visually inspect the wiring and connector for cylinder 2 deactivation solenoid for damage or corrosion.
Step 3: Measure resistance of the solenoid; compare to manufacturer specs (typically 20-30 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 PCM output or replace PCM as last resort.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause engine misfire, reduced performance, and potential damage to the catalytic converter.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, but can be higher if the PCM needs replacement.