Cylinder Deactivation Hydraulic Circuit Bank 1 High
The engine control module has detected an excessively high oil pressure or stuck-on signal in the bank 1 hydraulic circuit for cylinder deactivation. Either a stuck oil control valve, a blocked relief path, or a shorted pressure switch is reporting permanently high pressure.
Affected components
- Oil control valve
- Oil pressure switch
Common causes
- High likelihood: Oil control valve stuck open
- Medium likelihood: Pressure switch shorted
- Low likelihood: Blocked relief passage
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.