P3498
Cylinder Deactivation Pressure Sensor Bank 1
The engine control module has detected a fault with the bank 1 cylinder deactivation pressure sensor. Newer variable displacement systems use an analogue oil pressure sensor in addition to or in place of the legacy switch; a fault disables closed-loop deactivation control on bank 1.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Pressure sensor failedCommon
- Wiring or connector faultPossible
- Sensor port contaminated by sludgeLess likely
Parts involved
- Oil Pressure Sensor
- Engine Wiring Harness
- ECM
P3498 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.