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P3414 — Cylinder 2 Exhaust Valve Control Circuit Performance

Manufacturer-specificPowertrain (engine & transmission)

P3414 indicates a problem with the control circuit for the exhaust valve on cylinder 2. The engine’s computer is detecting that the signal to open or close the valve is not performing as expected.

Symptoms

What causes it — most likely first

1. Faulty or disconnected valve actuator cable

The cable that opens and closes the exhaust valve may be broken, frayed, or disconnected, preventing proper valve operation.

2. Worn or damaged exhaust valve actuator (solenoid)

The actuator that drives the valve may be stuck or have failed internally, causing inconsistent valve timing.

3. Exhaust valve sensor failure or wiring issue

A defective sensor or broken wire can send incorrect signals to the PCM, triggering the code.

4. Exhaust manifold gasket leak or vacuum line issue

A leak can alter pressure readings that the PCM uses to control the valve, leading to performance problems.

5. PCM/ECM software glitch or internal fault

In rare cases the engine computer may misinterpret signals, but this is uncommon compared to hardware failures.

How it's diagnosed

  1. Inspect the valve actuator cable for continuity and physical damage.
  2. Check the exhaust valve actuator solenoid for proper operation and electrical connection.
  3. Verify the exhaust valve sensor and associated wiring for faults or corrosion.
  4. Inspect the exhaust manifold for leaks or vacuum line integrity.
  5. Scan for additional codes that may point to related issues such as misfire or pressure sensor problems.

Code facts & related codes

SystemPowertrain (engine & transmission)
StandardizationManufacturer-specific (P1/B1/C1/U1)
Related codesP3410 — Cylinder 2 Deactivationintake Valve CoP3411 — Cylinder 2 Deactivationintake Valve CoP3412 — Cylinder 2 Deactivationintake Valve CoP3413 — Cylinder 2 Exhaust Valve Control CircuP3415 — Cylinder 2 Exhaust Valve Control CircuP3416 — Cylinder 2 Exhaust Valve Control Circu

Frequently asked

Why does the Check Engine Light stay on after replacing the valve actuator?

If the actuator is replaced but the cable or sensor wiring remains damaged, the PCM will continue to detect a performance issue. Re‑check all related components.

Is the PCM often the culprit for P3414?

The PCM is rarely the cause of this code. Most cases stem from mechanical or wiring faults with the valve actuator or sensor.

Can a faulty exhaust valve actuator be repaired instead of replaced?

Repairing the actuator is possible if the fault is due to a broken cable or connector, but many manufacturers recommend replacement for reliability.