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Help! Newbie -- P0440 Code

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Old Mar 9, 2011 | 09:25 PM
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Default Help! Newbie -- P0440 Code

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
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Old Mar 10, 2011 | 05:11 AM
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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.

Last edited by 4pointslow; Mar 10, 2011 at 06:11 AM.
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Old Mar 10, 2011 | 05:53 AM
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Check all evap hoses. Could possibly be fuel cap as well.
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Old Mar 10, 2011 | 07:44 AM
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mine does the exact same thing. new gas cap and all. someone else told me something about a charcoal canister in the tank...
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Old Mar 10, 2011 | 08:31 AM
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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
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Old Mar 10, 2011 | 09:13 AM
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that would be awesome if you could justin. it's driving me crazy as well lol
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Old Mar 10, 2011 | 09:16 AM
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It maybe later tonight if I can get it. Im at work right now! Ill try to get one asap
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Old Mar 10, 2011 | 09:47 AM
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Here you are. It is probably the gas cap but here you go anyway.

http://www.obd-codes.com/p0440
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Old Mar 10, 2011 | 01:34 PM
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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.
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