P3496
Cylinder 12 Deactivation
The engine control module has detected a fault in the cylinder 12 deactivation system. Found on V12 engines with cylinder deactivation.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Deactivation solenoid failedCommon
- Lifter stuckPossible
Parts involved
- Cylinder Deactivation Solenoid
- Lifter
- Engine Wiring Harness
P3496 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.