P0440 code solution? PLEASE HELP - Kia Forum
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#1 (permalink) Old 04-04-2008, 05:01 PM
acm
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Exclamation P0440 code solution? PLEASE HELP

2001 Kia Sportage, 5 speed, 4wd

Hi, I have seen various threads here on the p0440 and that is what my reader tells me.

1. The check engine light is on.
2. When I accelerate, the car hesitates from 1000-2500 rpm then smooths out after 2500rpm and idle is perfect.

I already removed the purge solenoid valve and tested it. Without voltage, nothing moves through. With 12v applied, I can blow through it from bottom to top just fine so the PSV is just fine.

I removed the carbon canister and blew through each of the two tubes and air moves through each way just fine without obstructions. The canister is not much bigger than a coffee mug and is super light. The pic of the canister on the kiatech manual shows 3 outlet/inlets on it, mine has ONLY 2. The number on the canister is K32A.

I cannot find the CCV (canister close valve)...from the fuel tank, I see a line going to the engine compartment and that goes to one of the two connectors to my canister. The outlet of the canister (other 1 of 2 connectors) goes to the bottom of the PSV and the PSV output on top goes to the top of the valve cover...I blew into this tube and there is no obstruction blowing from that tube into the valve cover. There are absolutely no electrical connections to the canister and there are no other valves or anything coming to or leaving the canister. I'm not talking about what is at the gas tank...just what is right there by the canister. Where is this mysterious CCV or do some models not have it? If not, then the kiatech manual is missing a LOT of info.

My gas cap tightens just fine and I click it way more than enough times as indicated by the sticker inside the gas cap..I will click it at least a dozen times. The o-ring is there and it looks just fine. With the engine running, should I be able to open the cap and find air rushes in or do I have to use up a significant amount of gas to produce a vacuum in the tank?

All the lines connecting to the fuel line, PSV, canister, etc... all seem fine and I can hear to hissing or anything. They are pretty rubbery and not hard and cracked at all.

The only thing that has changed on this car recently is that I had to replace the thermostat by the radiator and I installed manual wheel locks by the WARN company since they're superior to the vacuum ones...is is possible the vacuum part of the 4wd wheel lock engagement system is interfering with my acceleration?

Any help would be very much appreciated!

Thanks,
Aaron

Last edited by acm; 04-05-2008 at 05:32 PM.
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#2 (permalink) Old 04-04-2008, 05:33 PM
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Aaron

Either try cleaning the fuel filler cap (WD-40 + 20-30lbs of compressed air), or just buy a new filler cap (<$10)... this happened to me several times on my 02 Conv (160k miles) and each time just cleaning the cap fixed the problem.

Also, from another website:

"Re: Topping-off the gas tank during re-fueling

If excess fuel comes back up to the top of the filler neck,it can go back down into the charcoal canister thru the vent hose and cause the canister close valve and purge valve to stick open or closed and cause a CEL"


Harry

Last edited by Harry Morgan; 04-04-2008 at 05:50 PM.
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#3 (permalink) Old 04-04-2008, 06:07 PM
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Default fixed engine light problem and/or hesitation on acceleration?

Thanks Harry,

Did replacing the cap only make the p0440 code/engine light disappear or did you also have the sputtering acceleration problem and it fixed that as well?
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#4 (permalink) Old 04-04-2008, 06:18 PM
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Aaron

Yes -- it fixed the P0440; No -- I did not have a hesitation problem... perhaps related, but likely a different cause.

Howmany miles on your vehicle ?

Harry
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#5 (permalink) Old 04-04-2008, 11:34 PM
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Default 115k miles on sportage

Harry, there are about 115,000 on it.

Aaron
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#6 (permalink) Old 04-05-2008, 01:32 PM
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Default Kia CCV missing?

So does anyone have any idea why I have this small canister and no CCV connected to it at all in my evap system? Everything looks stock but is different from the online tech manual.
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#7 (permalink) Old 04-05-2008, 08:30 PM
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Question

My little canister is different from everything I've seen in manuals, etc...
Can anyone tell me if this is some dealership modification to get around some faulty CCV problem? Please see pic below

I have P0440 code and I'm not worried about a gas cap leak or anything. I have acceleration hesitation from 1000-2500rpm then it smooths out and idling is fine.

This only started about a week ago and the car has about 115k on it. 2001 Kia Sportage, 4wd, 5 speed.


Last edited by ron1004; 04-05-2008 at 09:40 PM.
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#8 (permalink) Old 04-06-2008, 05:19 PM
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Aaron

I'm not real good at the pix stuff, but I tried to attach a picture of my 02 Conv canister... for what it's worth.

Harry
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Last edited by Harry Morgan; 04-07-2008 at 11:40 AM.
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#9 (permalink) Old 04-07-2008, 11:57 AM
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Aaron

Everything I see has the three connectors. On the attached diag the middle one goes to the fuel tank; the PSV one goes to the intake manifold; and, the CCV one terminates at the CCV.

The only thing I can think of is that the CCV itself is built into the canister in your case, or is on the bottom of the canister (???).

I suppose you could try ordering just the CCV for your model from the dealer and see what they come up with.

Harry
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Last edited by Harry Morgan; 04-07-2008 at 12:18 PM.
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#10 (permalink) Old 12-26-2008, 04:09 PM
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Exclamation Still have P0440 problem.

8 Months later, I still have the P0440 problem.

The hesitation on acceleration was because the plug closest to the firewall was soaked in oil - I suppose this means the valve cover gasket was leaking? The plug had oil from the top of the plug where it has the coil connected to it. I changed the plugs and it ran fine for a while but the hesitation kicked in a few months ago.

Will a leaky valve cover gasket cause a P0440 problem?
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