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#1 Old 07-30-2011, 07:15 PM
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[b]Hi guys and possibly gals!

My 2002 Elantra's check engine light came on a while back and about a month ago I hooked
a code scanner to the OBD II port and 'evap purge control valve incorrect flow' or something like
that came up. It's p0441 anyways. So from what I have been
reading out here is that a common problem with this car would be the purge valve solenoid.
So I bought a new Dorman valve and replaced it. It's the one near the intake manifold. I
reset the light. Next day CEL comes back on! So I bought a canister close valve, the one that
goes in the back next to the vapor canister, as I have read was a second most common problem.
Replaced it, reset the light, next day light comes back on!!
Do you think I should replace the vapor canister or should I take it to a mechanic to smoke test it
and check things I may not know about? It could be a leak but the hoses from what I can see still
look in good shape. I have been taking my time cause I don't have to bring it to inspection here in
Jersey until March. But it's gonna hafta get fixed eventually. Thanks.
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#2 Old 10-22-2011, 11:27 PM
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Quote:
Originally Posted by seventythirty View Post
Hi guys and possibly gals!

My 2002 Elantra's check engine light came on a while back and about a month ago I hooked a code scanner to the OBD II port and 'evap purge control valve incorrect flow' or something like that came up.
P0441 Evap. Emission System Incorrect Purge Flow

It's p0441 anyways.
Ok. follow diag procedures and repair it.

So from what I have been reading out here is that a common problem with this car would be the purge valve.
Some what common part failure

So I bought a new Dorman valve and replaced it.
Use the Hyundai/Kia part as supplied by dealer, very well could have got BUM aftermarket part

I reset the light.
Use scanner to clear the code from PCM ?

Next day CEL comes back on!
Proper term is "MIL"

So I bought a canister close valve, the one that goes in the back next to the vapor canister, as I have read was a second most common problem.
So you and arbitrarily dropped cash on a guess without knowing what the code was associated with MIL this time around ? CCV be source of 0455 or 0446 code if malfunction.. and then toss in various circuit codes for the electric end of it,, likely compounded your problem some more

Replaced it, reset the light, next day light comes back on!!
What was the code ?

Do you think I should replace the vapor canister
NO,, likely be another $$ guess

or should I take it to a mechanic to smoke test it and check things I may not know about?
Let a Hyundai trained tech inspect it.. they have ability to force an evap test with Hi-Scan or GDS while inspecting different areas for leaks

It could be a leak but the hoses from what I can see still look in good shape.
Looks dont mean a thing..

I have been taking my time cause I don't have to bring it to inspection here in Jersey until March. But it's gonna hafta get fixed eventually.
[b]Um, yea.... MIL illuminated makes you an "emission violator"

Thanks.
Here is what supposed to happen.. PCM command Purge to cycle.. the cycling draws a cyclic vacuum pulse in the line to the canister, through the charchol bed and CCV opening. The resulting disruption of pressure
is seen by the tank pressure sensor as a voltage fluctuation fed back to PCM so PCM know it command of Purge is working down the line as an action.. a leak in the purge line between the purge and canister/tank pressure sensor,, sensor see no change, so you can get MIL..

Purge stuck open and PCM see tank pressure sensor change when there is no command from PCM to purge, we get MIL.

Pretty easy now if you know what you looking for... I deal with it everyday as a Certified Hyundai Tech

Last edited by sbr711; 10-22-2011 at 11:30 PM.
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