Evaporative Emission Control System Vent Control Malfunction

CODE NUMBER
P0446 Evaporative Emission Control System Vent Control Malfunction

BACKGROUND
The engine control module checks current flows in the evaporative emission ventilation solenoid drive difficult when the solenoid is ON and OFF.

CHECK AREA
Battery voltage is 10 V or higher.

JUDGMENT CRITERIA
- Solenoid coil surge voltage (System voltage +2 V) is not detected when the EVAP emission vent solenoid is turned on/off.

PROBABLE CAUSES
- Evaporative emission ventilation solenoid failed.
- Open or shorted evaporative emission ventilation solenoid circuit, or loose connector.
- engine control module failed.




DIAGNOSTIC CHART