EVAP System Leak Detection Pump Switching Valve Control Circuit Open
The switching valve in the LDP - directs pump output between EVAP test path and reference orifice - has an open control circuit.
Affected components
- Evap leak detection pump switching valve
Common causes
- High likelihood: Open in valve or wiring
- Low likelihood: Pin pushed back out of connector body
- Low likelihood: Cracked solder joint inside the module or sensor
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.