Cylinder Deactivation Hydraulic Circuit Bank 2 Open
The engine control module has detected an open hydraulic circuit in the cylinder deactivation system on bank 2. Loss of oil flow, a failed oil pressure switch or a disconnected oil control valve prevents the system from deactivating cylinders on bank 2.
Affected components
- Oil control valve
- Oil pressure switch
- Lifter
- Engine oil passage
Common causes
- High likelihood: Oil pressure switch failed
- Medium likelihood: Oil passage blocked or sludge buildup
- Medium likelihood: Oil control valve stuck
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.