Hi , I have a 2004 sonata with the 2.4 dohc ,We keep getting a check
eng. light comeing on with the code of P446 evap system ,we have taken
it in to the dealer 4 times now and they replaced parts each time an
said its ok now Each time it lasted less than one day before it came
back on up until they replaced a pressure valveon the fuel tank,Well
its has been ok now for 4 months now its comeing back on with the same
code(I have a scanner for the OBD11 systems) but all along they have
been telling us that its because we live on a dirt road here in Az, I
think this is BS, altho each time I change the oil every3000 miles
(which is once a month)I use my air hose an blow gun anblow dust out
from the evap canister which is mounted at the rear of the car behind
the left rear tire (great place to put it) Have installed mud flaps to
try to deter some of the dust but didn’t help much .Now so far they
haven’t charged me but this is a real pian in the butt. Now the road
we live on is only 2miles long and we drive at25mph on it . my
question is,Is this car built NOT to drive on dirt roads ? Or is it
the evap is just a bad design? thanks for any advice Slim

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Just as dirt roads require you to replace the air filter more frequently,
you may also need to replace your canister filter more frequently. The
dealer could be entirely off base, but what they've told you is plausible.

 

Well slimone,
I have to say, i drive the exact same car, 2.4 EFI, petrol, '04 Sonata,
but the Aussie model, I do about the same travel as you, and 80-90% of it is
on dirt, of badly surfaced roads, and I have never had any of these symptoms
at all.... While Hyundai is paying for it, take it back to them and insist
they find the prob, or find yourself a really good, trustworthy mechanic....
Hyundai dont always know the problems, as I found with my 1995 excell i had
previous to my Sonata, as only my mechanic found the reason for my
issues..... a lousy distributor caused a missfire, yet three local mechanics
and Hyundai themselves could not find the prob...
"slimone" <UseLinkToEmail@AutoForumz.com> wrote in message
news:1_529133_07fc68e8573fc1c151e14643d0f8042c@aut oforumz.com...
> Hi , I have a 2004 sonata with the 2.4 dohc ,We keep getting a check
> eng. light comeing on with the code of P446 evap system ,we have taken
> it in to the dealer 4 times now and they replaced parts each time an
> said its ok now Each time it lasted less than one day before it came
> back on up until they replaced a pressure valveon the fuel tank,Well
> its has been ok now for 4 months now its comeing back on with the same
> code(I have a scanner for the OBD11 systems) but all along they have
> been telling us that its because we live on a dirt road here in Az, I
> think this is BS, altho each time I change the oil every3000 miles
> (which is once a month)I use my air hose an blow gun anblow dust out
> from the evap canister which is mounted at the rear of the car behind
> the left rear tire (great place to put it) Have installed mud flaps to
> try to deter some of the dust but didn't help much .Now so far they
> haven't charged me but this is a real pian in the butt. Now the road
> we live on is only 2miles long and we drive at25mph on it . my
> question is,Is this car built NOT to drive on dirt roads ? Or is it
> the evap is just a bad design? thanks for any advice Slim
>
> --
> Posted using the http://www.autoforumz.com interface, at author's request
> Articles individually checked for conformance to usenet standards
> Topic URL:
> http://www.autoforumz.com/Hyundai-04...ict112535.html
> Visit Topic URL to contact author (reg. req'd). Report abuse:
> http://www.autoforumz.com/eform.php?p=529133

 

"slimone" wrote:
> Hi , I have a 2004 sonata with the 2.4 dohc ,We keep getting a
> check eng. light comeing on with the code of P446 evap system
> ,we have taken it in to the dealer 4 times now and they
> replaced parts each time an said its ok now Each time it
> lasted less than one day before it came back on up until they
> replaced a pressure valveon the fuel tank,Well its has been ok
> now for 4 months now its comeing back on with the same code(I
> have a scanner for the OBD11 systems) but all along they have
> been telling us that its because we live on a dirt road here
> in Az, I think this is BS, altho each time I change the oil
> every3000 miles (which is once a month)I use my air hose an
> blow gun anblow dust out from the evap canister which is
> mounted at the rear of the car behind the left rear tire
> (great place to put it) Have installed mud flaps to try to
> deter some of the dust but didn't help much .Now so far they
> haven't charged me but this is a real pian in the butt. Now
> the road we live on is only 2miles long and we drive at25mph
> on it . my question is,Is this car built NOT to drive on dirt
> roads ? Or is it the evap is just a bad design? thanks for
> any advice Slim

The code P446 evap system is the code for the vacuum system for the
gas tank. There is proably a leak in the air valve for the gas tank,
or when you put gas in, the cap is not on tight enough. The car is
safe to drive and is not leaking any gas, only air. Eather way the
only way for the light to go off you need to reset the code.