P3464
Cylinder 8 Exhaust Valve Control Circuit High
The engine control module has detected a high voltage condition in the control circuit of the cylinder 8 exhaust valve deactivation solenoid. A short to voltage or open low-side path causes the driver to read above the expected range, disabling cylinder deactivation requests for cylinder 8.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Solenoid or wiring shorted to powerCommon
- Solenoid coil openPossible
- ECM driver failedLess likely
Parts involved
- Cylinder Deactivation Solenoid
- Engine Wiring Harness
- ECM
P3464 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.