Got this code about a week ago..any guidelines were to start the diagnosing process? 1996 legacy 2.2 automatic

The code states there is a problem with the circuit to the evaporative filter. Most likely a bad connection to it. There is a different code for a shorting problem.

The full definition for P0446 is ''Evaporative Emission Control System Vent Control Low Input''. As Cougar mentioned, the cause is often a bad (corroded) connection, although the vent control solenoid valve's coil could be bad, etc. The topic comes up here periodically. I'd suggest you scroll down the page and look at the ''Similar Threads'' there, and/or use the forum search function, searching for ''P0446''.