Cylinder 3 Exhaust Valve Control Performance
The Powertrain Control Module (PCM) has detected an operational fault in the exhaust valve control mechanism for cylinder 3, which is typically part of the cylinder deactivation system. This code is set when the PCM commands the cylinder 3 exhaust valve to deactivate or reactivate, but the system feedback indicates the valve did not respond as expected.
While the vehicle can usually still be driven, the cylinder deactivation system will be disabled. Prolonged driving with this issue can lead to poor fuel economy, rough running, and potential valvetrain wear.
Common symptoms
- Illuminated Check Engine Light
- Engine running rough or misfiring
- Decreased fuel efficiency
- Lack of engine power during acceleration
- Unusual ticking noises from the engine valvetrain
Likely causes
- Low engine oil level or dirty engine oil
- Faulty cylinder 3 exhaust valve control solenoid
- Clogged or restricted engine oil passages
- Damaged wiring or loose connections in the solenoid circuit
- Mechanical failure of the cylinder 3 lifter or rocker arm
What to check before replacing parts
Check the engine oil level and condition
Look for: Look for low oil levels or excessively dirty oil, which can prevent hydraulic cylinder deactivation components from functioning properly.
Inspect the wiring and connectors for the cylinder 3 exhaust valve control solenoid
Look for: Look for frayed wires, corrosion, or loose connections that could interrupt the electrical signal to the solenoid.
Test the cylinder 3 exhaust valve control solenoid electrically
Look for: Look for resistance readings outside the manufacturer's specified range or a failure to actuate when direct power and ground are applied.
Measure the engine oil pressure with a mechanical gauge
Look for: Look for oil pressure readings that are below the minimum specification required to operate the variable valve or cylinder deactivation system.
Inspect the valvetrain mechanically under the valve cover
Look for: Look for collapsed lifters, damaged rocker arms, or severe sludge buildup preventing normal valve operation.
This page explains the generic P3422 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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