What is the check engine code P0445 for a 1997 Chevy Malibu?

P0445 on a 1997 Chevy Malibu indicates a problem with the evaporative emission (EVAP) system purge control valve or solenoid. This valve is responsible for venting fuel vapors from the charcoal canister into the engine to be burned. The code means the computer has detected a malfunction in this system, possibly due to a faulty valve, vacuum leak in the lines leading to or from the valve, a clogged charcoal canister, or a problem with the purge control solenoid itself.