Hi all, I'm a newbie here on the Lexus Forum. I just bought a 2001 Lexus IS with 60k miles. I am getting an EVAP code P0440. What I noticed happening is, everytime I fill the tank (full) and drive about 80 miles, the check engine light would come on. I know I have a leak somewhere coming from the rear of the car because I can smell fuel after I drive the car and park it inside the garage. Seems to be coming from the Right rear wheel well. Wierd thing is, when I fill the tank only 3/4 full, and drive, the check engine light won't turn on. I can keep filling it only 3/4 full and No check engine light. Once I do a full tank, guaranteed check engine light after about 80 miles.

Any ideas? maybe one of the check/vent valves? Anyone have this problem before? Thanks in advance!

Ric

 

Congrats on the the car. 60k on an 01!? Damn...nice.

Sry I dont know much about your problem. Maybe its something simple like needing a new gas cap or making sure its screwed on properly? Seems obvious, I know, but you'd be surprised. Id try that, first.

 

Check all evap hoses. Could possibly be fuel cap as well.

 

mine does the exact same thing. new gas cap and all. someone else told me something about a charcoal canister in the tank...

 

its not in the tank its behind the fuel tank. Lift up the car it should be under there somewhere. If I get mine on my lift today ill snap a pic of it

 

that would be awesome if you could justin. it's driving me crazy as well lol

 

It maybe later tonight if I can get it. Im at work right now! Ill try to get one asap

 

Here you are. It is probably the gas cap but here you go anyway.

http://www.obd-codes.com/p0440

 

I tried the gas cap deal, no go...bought a new one from the dealer, and still giving me the code, only if i fill the tank to full.