Cylinder 6 Deactivation/Intake Valve Control Circuit/Open
Code P3441 indicates a problem in the cylinder deactivation system, specifically for cylinder 6's intake valve control circuit. This system, often found in engines with Active Fuel Management (AFM) or Variable Cylinder Management (VCM), uses solenoids to disable valve lift when cylinders are deactivated for fuel economy. An open circuit means the solenoid or its wiring has a break, preventing the valve from operating correctly. This can cause misfires, rough idle, and reduced fuel economy.
1. Most Common Causes
- Faulty cylinder deactivation solenoid for cylinder 6
- Open or shorted wiring in the solenoid circuit
- Poor electrical connection at the solenoid connector
- Engine control module (ECM) failure (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: Inspect wiring and connector for cylinder 6 deactivation solenoid for damage, corrosion, or loose pins.
Step 3: Test solenoid resistance with a multimeter; compare to manufacturer specs (typically 20-30 ohms).
Step 4: Check for voltage and ground at the solenoid connector with the engine running.
Step 5: If wiring and solenoid are good, test ECM output or replace solenoid.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances. The engine may misfire, causing catalytic converter damage and reduced performance. Have it diagnosed promptly.
How much does it cost to fix?▼
Typically $50-$150 for diagnosis and solenoid replacement. 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.