P3477
Cylinder Deactivation Oil Pressure Switch Bank 2 Circuit
The engine control module has detected an electrical fault in the cylinder deactivation oil pressure switch circuit on bank 2. Without a valid signal the module cannot confirm that hydraulic pressure has reached the level needed to deactivate cylinders on bank 2.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Oil pressure switch failedCommon
- Wiring short or openPossible
- Connector corrosionLess likely
Parts involved
- Oil Pressure Switch
- Engine Wiring Harness
- ECM
P3477 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.