Possible Causes
Malfunction is detected when an excessively high voltage signal from the sensor is sent to ECM. Possible causes are:
- Harness or connectors (sensor circuit is open or shorted).
- Defective EVAP control system pressure sensor.
- Defective EVAP canister vent control valve.
- Defective EVAP canister.
- Defective water separator.
- Defective rubber hose from EVAP canister vent control valve to water separator.