Cylinder 8 Exhaust Valve Control Circuit High
The engine control module has detected a high voltage condition in the control circuit of the cylinder 8 exhaust valve deactivation solenoid. A short to voltage or open low-side path causes the driver to read above the expected range, disabling cylinder deactivation requests for cylinder 8.
Affected components
- Cylinder deactivation solenoid
- Engine wiring harness
- Ecm
Common causes
- High likelihood: Solenoid or wiring shorted to power
- Medium likelihood: Solenoid coil open
- Low likelihood: ECM driver failed
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.