Cylinder 2 Exhaust Valve Control Circuit/Open
Diagnostic trouble code P3413 indicates that the powertrain control module (PCM) has detected an open circuit or malfunction in the exhaust valve control circuit for cylinder 2. This circuit is part of the cylinder deactivation system, which shuts down specific cylinders under light load conditions to improve fuel economy.
While the vehicle will typically remain drivable, the cylinder deactivation system will be disabled, leading to reduced fuel economy. It should be diagnosed and repaired soon to restore full system functionality and prevent potential secondary engine performance issues.
Common symptoms
- Illuminated Check Engine Light
- Decreased fuel economy
- Engine misfire or rough idle
- Lack of engine power
- Cylinder deactivation system disabled
Likely causes
- Faulty cylinder 2 exhaust valve control solenoid
- Low engine oil level or poor oil pressure
- Wiring harness issues (open, shorted, or corroded wires) in the cylinder 2 exhaust valve circuit
- Poor electrical connection at the valve control solenoid connector
- Restricted oil passages in the engine
- Faulty Powertrain Control Module (PCM) (rare)
What to check before replacing parts
Check the engine oil level and condition.
Look for: Ensure the oil is at the correct level and is clean. Low or dirty oil can prevent the hydraulic cylinder deactivation solenoids from operating correctly.
Visually inspect the wiring and connector for the cylinder 2 exhaust valve control solenoid.
Look for: Look for frayed wires, melted insulation, corrosion, or a loose connector that could cause an open circuit.
Test the resistance of the cylinder 2 exhaust valve control solenoid using a multimeter.
Look for: Compare the resistance reading to the manufacturer's specification. An infinite reading indicates an internal open circuit in the solenoid, requiring replacement.
Check for voltage and ground at the solenoid connector with the key on, engine off (or commanded via scan tool).
Look for: Verify that the PCM is sending the correct control voltage and that a good ground is present. Lack of voltage indicates a wiring issue back to the PCM or a PCM fault.
Perform an oil pressure test using a mechanical gauge.
Look for: Verify that the engine oil pressure meets the manufacturer's specifications, as the cylinder deactivation system relies on adequate oil pressure to function.
This page explains the generic P3413 definition and is general reference information, not a diagnosis for your specific vehicle. Actual causes, severity, and repairs vary by make, model, engine, and mileage — always confirm with a scan tool and a qualified technician before replacing parts.
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