2008 Ford Taurus SEL P0446 Code: Diagnosing and Fixing Evaporative Emission System Fault
I have replaced both the purge and vent solenoids, as well as the gas cap, but the P0446 code persists. Could this indicate a problem with the Powertrain Control Module (PCM), or is there another potential cause I should investigate?
To troubleshoot the issue, you must verify that B+ voltage is present at the feed wire of the vent solenoid. This helps confirm whether the solenoid is receiving proper power and can rule out wiring or electrical faults as a root cause.