P1421

DTC P1420 / P1421: Evaporative Emission System Vent Valve Stuck Open / Closed

System Description
Refer to EVAP Leak Check System Description.

System Diagram:

System Diagram

Wiring Diagram:

Wiring Diagram

DTC Detecting Condition And Trouble Area:

DTC Detecting Condition and Trouble Area

Step 1-4:

DTC Troubleshooting

NOTE: Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to Precautions for DTC Troubleshooting.