P3424
Cylinder 3 Exhaust Valve Control Circuit High
The engine control module has detected a high-side voltage fault (short to power) on the cylinder 3 exhaust valve deactivation solenoid circuit. Cylinder deactivation is disabled while the fault is present.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Wiring shorted to powerCommon
- Solenoid internal shortPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Cylinder Deactivation Solenoid
- Engine Wiring Harness
- ECM
P3424 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.