Your most likely culprits are going to be a loose, damaged gas cap, vent or purge solenoid, evap canister, or fuel pressure sensor. Other than the gas cap, I believe all of these items are dealer only.
Evaporative Emission Control System Malfunction
A code P0440 could mean one or more of the following has happened:
P0440 EVAP System No Flow During Purge Possible Causes Setting Conditions
DTC�P0107, P0108, P0112, P0113, P0115, P0116-P0118, P0121, P0122, P0123, P0125, P0443, P0449, P0452, P0453, P1106, P1107, P1112, P1114, P1115, P1121 and P1122 not set, engine started, ECT and IAT sensors from 39-86�F and within 16�F at startup, vehicle driven at a steady speed less than 72 mph, system voltage over 10.0v, BARO sensor more than 75�kPa, fuel level from 15-85%, and the PCM detected the EVAP system was unable to achieve and maintain vacuum during the EVAP flow and leak test. Note: An Ultrasonic Leak Detector can be used to help detect a leak.
This code sets in 2 Trip(s).
Trouble code P0440 means:Evaporative emission control system malfunction
Trouble code P0440 means: EVAP System No Flow During Purge
I JUST got the diagnostic back on my car and it had the same code, P0440, come up. It means there was an evaporation leak detected. It can mean a few things could be leaking on your vehicle, down to as simple as tightening your gas cap. http://repairpal.com/OBD-Code-P0440 Hope this helps!
The code number is P0440 not 1744 see: http://www.obd-codes.com/forums/2669-obd-codes-2001-chevy-cavalier-p0440-evap-code-check-enginehelp.html
P0440 = EVAP Emission Control System Malfunction.
Trouble code P0440 means: Evaporative Emission System
Trouble code P0440 means:Evaporative emission control system malfunction
Trouble code P0440 means:Evaporative emission control system malfunction
Trouble code P0440 means:Evaporative emission control system malfunction
Trouble code P0440 means:Evaporative emission control system malfunction
Trouble code P0440 means:Evaporative emission control system malfunction
Trouble code P0440 means: EVAP Purge System Fault