EVAP System Purge Control Valve B Circuit Open
The second EVAP purge control valve (B) - used on systems with a divided purge path or on twin-bank engines - shows an open control circuit. The ECU cannot drive the valve, so vapor cannot be purged through this stage; tank pressure may rise and emissions diagnostics fail.
Affected components
- Evap purge valve b
- Evap purge wiring b
Common causes
- High likelihood: Open in harness or connector
- Medium likelihood: Solenoid winding open
- 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.