Evaporative Emission System Vent Control Circuit Open
The ECU detected an open circuit on the EVAP vent valve control. The vent valve is needed to seal the system for leak diagnostics; with the circuit open the leak test cannot complete.
Affected components
- Evap vent valve
- Vent valve wiring
Common causes
- High likelihood: Vent valve circuit open
- Medium likelihood: Wiring or connector fault
- Low likelihood: Pin pushed back out of connector body
Possible symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
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.