I have a 98 toyota corolla. What does diagnostic code 440 mean and how do you correct it? Please help!!!!!!

did you do a web search for OBD2 (on-board diagnostic computer, 2nd generation all cars 1998 and on)

I think 440 is a problem with EVAP leakage, meaning a leak in the gas tank vapour recirculation problem. Usually it is cause either by a gas cap not tighten sufficiently or a leak in the EVAP hoses.

Check your gas cap first.

Thank you for your suggestion. We are in the process of checking the hoses out.

gas cap seal is a common problem with our Corolla,
This year and last I think, We started putting warnings on the gas cap.
It will "throw a code" ,I'll check tomorrow at work if it's 440.

Outthere Too

Ok , I have the Diagnostic code PDF.

P0440
Evaporative Emission Control
System Malfunction

Vapor pressure sensor
 Fuel tank cap incorrectly installed
 Fuel tank cap cracked or damaged
Vacuum hose cracked, holed, blocked, damaged or
disconnected
 Hose or tube cracked, holed, damaged or insufficient seal
 Fuel tank cracked, holed or damaged
 Charcoal canister cracked, holed or damaged
 Fuel tank over fill check valve cracked or damage

Outthere Too.

Thank you for looking that code up. Hopefully I can get this thing figured out quick now.

If you filled up on fuel with the vehicle running, it will trigger the code also.