P3418
Cylinder 3 Deactivation/Intake Valve Control Performance
The engine control module has detected a performance fault on the cylinder 3 deactivation or intake valve control system — the response of the actuator does not match the commanded state.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Lifter stuck collapsedCommon
- Engine oil pressure too lowPossible
- Oil passage blocked or contaminatedPossible
Parts involved
- Cylinder Deactivation Solenoid
- Lifter
- Oil Control Valve
P3418 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.