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P0440 Evap Small Leak Code

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Old Oct 15, 2007 | 10:48 PM
  #1  
Nismo98's Avatar
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P0440 Evap Small Leak Code

Could anybody provide any input in regard to this matter. This code popped up on my AE last week, car seems to be running just fine except for a rich smell of fuel.

Andrei
Old Oct 16, 2007 | 05:43 PM
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you have a small leak in your evap system....

Check your gas cap...this is VERY common. take it off clean the sealing surfaces, make sure you do the three clicks etc.

otherwise there is about 20 things on the evap system that could be clogged leaky etc.

Try the cap, then let us know.
Old Oct 16, 2007 | 11:24 PM
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Originally Posted by Matt_01SE_20th
you have a small leak in your evap system....

Check your gas cap...this is VERY common. take it off clean the sealing surfaces, make sure you do the three clicks etc.

otherwise there is about 20 things on the evap system that could be clogged leaky etc.

Try the cap, then let us know.
I would like to get the ball rolling on other possibilities other then the gas cap. I'll diffidently check on the cap but what other common issues could I look into on the evap system?

Andrei
Old Oct 17, 2007 | 09:18 AM
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Matt is correct about the 20 other things. The FSM for my 2k2 has about 8 pages on things to check. I get that code and I just keep clearing it.
Old Oct 19, 2007 | 12:03 PM
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This code means, "Very Small leak in EVAP system"

I had this code on for a year and felt no diffrence in driving other than the light annoyed me. I took it to the dealership. They replaced the gas cap and the fuel canister, located behind the rear bumper, close to the fuel inlet tube. However, that didn't fix the problem. They had to smoke the whole fuel system to see where it leaks. And it was a small crack in a rubber hose. Check all of your hoses and tubes that are involed in fuel system. There could be a loose clamp too. Also, all of your clamp should be place 2mm from the end of tubes and hoses. Just take your time on ispecting everything. Or the most expensive option would be taking it to the dealership. It cost me $560, I got tired of ispecting every hose.
Old Oct 19, 2007 | 05:21 PM
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haha that's what i was gonna say; bring it to a small shop and tell them to smoke the system
if it's too small u'll have a really hard time finding it
shine some light to help see
Old Oct 19, 2007 | 05:52 PM
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Originally Posted by eugenemaxima
I had this code on for a year and felt no difference in driving other than the light annoyed me. I took it to the dealership. They replaced the gas cap and the fuel canister, located behind the rear bumper, close to the fuel inlet tube. However, that didn't fix the problem. They had to smoke the whole fuel system to see where it leaks. And it was a small crack in a rubber hose. Check all of your hoses and tubes that are involved in fuel system. There could be a loose clamp too. Also, all of your clamp should be place 2mm from the end of tubes and hoses. Just take your time on inspecting everything. Or the most expensive option would be taking it to the dealership. It cost me $560, I got tired of inspecting every hose.
My code came on and stayed for couple of days. After words it disappeared for about a week and now it's on again. I don't drive the Maxima that often, so I don't know what might happen in the near future.


Originally Posted by getbigtony
haha that's what i was gonna say; bring it to a small shop and tell them to smoke the system
if it's too small u'll have a really hard time finding it
shine some light to help see
I don't know about this one...

Andrei
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