OBD-II Hybrid Error Code P3416: How to Fix It

Q: Can I drive my car with a P3416 code?

In most cases, yes — P3416 is a medium-severity code and the vehicle will typically enter a failsafe mode that simply disables the cylinder deactivation system. All cylinders will fire normally, so driveability is usually not affected. However, you may notice slightly reduced fuel economy. You should still address the repair promptly, as ongoing oil pressure issues related to the actuator can cause long-term engine wear.

Q: Will a P3416 code cause my check engine light to come on?

Yes. P3416 is a stored fault code that will illuminate the check engine light (MIL) on your dashboard. The light will remain on until the code is diagnosed, repaired, and cleared with an OBD2 scanner. It may also return if the underlying issue is not fully resolved.

Q: Is P3416 related to low engine oil?

Absolutely. The cylinder deactivation actuator is an oil-pressure-operated device. Low oil level, dirty oil, or sludge-clogged passages are among the most common causes of P3416. Always check your oil level and condition as a first step — an oil change alone sometimes resolves the code on vehicles where oil maintenance has been neglected.

Q: How much does it cost to fix a P3416 code at a shop?

Costs vary widely depending on the root cause. An oil change and code clear may cost $50–$100. Replacing the Cylinder 6 deactivation actuator solenoid typically costs $150–$400 in parts and labor. If the Lifter Oil Manifold Assembly (LOMA) needs replacement, expect $300–$700. If the underlying cause is a failed oil pump or internal engine damage, costs can exceed $1,500 or more.

Q: What other codes often appear with P3416?

P3416 commonly appears alongside other cylinder deactivation codes such as P3400 (Cylinder 1 deactivation actuator), P3425 (Cylinder 4 deactivation actuator), or P3441 (Cylinder 6 deactivation actuator circuit low). You may also see P0521 or P0522 if there is a broader oil pressure sensor issue. Addressing all codes together will lead to a more complete and lasting repair.

Abstract

Error code P3416 indicates a problem with the Cylinder 6 deactivation actuator in your hybrid vehicle. This system is part of Active Fuel Management (AFM) or Variable Cylinder Management (VCM), which shuts off select cylinders under light load to save fuel. When the actuator responsible for deactivating Cylinder 6 malfunctions or sends an unexpected signal, the ECM logs P3416 and may disable the cylinder deactivation system entirely to protect the engine.