Hello and welcome to Just answer.com, Super mechanic here. About your vehicle.
There has been a service bulletin isued for that code. I have run into this before, also the wires comming out of the connector. That would bethe first thing to check. Here is what the bulletin states.
File In Section: 06 - Engine/Propulsion System
Bulletin No.: 02-06-04-044
Date: August, 2002
Some customers may comment that the SES light is/was illuminated.
A technician may find DTC P0440 is stored in the PCM.
The EVAP solenoid harness may be misrouted around the rear antilock brake (ABS) wire harness causing a chaff/damage to the EVAP vent solenoid harness, setting DTC P0440.
Follow the service procedure below to diagnose and correct this condition.
Locate and inspect the EVAP vent solenoid harness (3) routing. The harness may be routed below the ABS wiring harness (4) at the right rear corner of the fuel tank, causing stress on the EVAP solenoid harness (3).
If all of the wires are good you will want to check for any leaks in the evap system.