DTC P0446: Change Over Valve (COV) (EVAP System Leak Detection Pump) Stuck Closed: Notes

WARNING: This page is about a different car, the 2004 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: DTC P0446 Detection Condition & Possible Causes Chart

Courtesy of MAZDA MOTORS CORP.