P1421

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

System Description
Refer to EVAP Leak Check System Description (If Equipped).

System Diagram:

System Diagram

Wiring Diagram:

Wiring Diagram

DTC Detecting Condition And Trouble Area:

DTC Detecting Condition and Trouble Area

Step 1-5:

Step 6:

DTC Troubleshooting