Cylinder Deactivation Oil Pressure Switch Bank 1 Circuit
The engine control module has detected an electrical fault in the cylinder deactivation oil pressure switch circuit on bank 1. The switch confirms that hydraulic pressure has reached the level required to collapse the switching lifters; without a valid signal the system disables deactivation.
Affected components
- Oil pressure switch
- Engine wiring harness
- Ecm
Common causes
- High likelihood: Oil pressure switch failed
- Medium likelihood: Wiring short or open
- Low likelihood: Connector corrosion
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.