Engine light 2003 H2 Help...
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Engine light 2003 H2 Help... - 2/5/2008 4:28:34 PM
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flrtrader
Posts: 37
Joined: 1/22/2008
Status: offline
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Hi,
New to the forum and am having a problem I can't seem to tackle. Engine light came on a few weeks ago and I took it into Autozone to have the code read, Which was PO455
At the time they said it looked like a gas cap issue and mine was not tightning as it sould so I replaced it, they reset the light and said here's hopping it stays off! Well I was happy cause it stayed of for almost a week, BUT today she popped back on,... I stopped back by to get another code read and was told it was the same code, but now with the cap replaced it was saying a large leak in the evap system which could be evap can broke, hose cracked or fell off, or purge or vent selinoid defective, or... vacum leak at engine. I feel stupid but I have no idea where the Evap canister is, and could find nothing pointing me at it. I don't think its a Vac leak at the engine cause the motor runs perfect, not a miss... not a sputter... So... if any one of you really kind people can help with the code, first place you'd look ect. Actually a pic of the evac canister might help.... 
Thanks in advance....
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Keith D. Moore
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RE: Engine light 2003 H2 Help... - 2/5/2008 4:43:56 PM
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Muddydawg75
Posts: 9955
Joined: 3/11/2007
From: South Jersey Shore
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I had the vent solenoid replaced for p0446 and also the cannister for p0446...
I think p0445 is for the relief valve on the top of your gas tank...
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RE: Engine light 2003 H2 Help... - 2/5/2008 6:30:13 PM
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blackstangs281
Posts: 6793
Joined: 11/13/2005
From: Pittsburgh PA
Status: online
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The canister is located on the drivers side frame, about mid vehicle.
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RE: Engine light 2003 H2 Help... - 2/5/2008 6:36:58 PM
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blackstangs281
Posts: 6793
Joined: 11/13/2005
From: Pittsburgh PA
Status: online
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The 455 code is a large leak in the system. If it is not the cap, then a line or hose has to be off or cracked. Or it could be a purge valve stuck open.
The H2 runs a check in between 1/4 and 3/4 tank of gas. That may explain why the light did not come back on right away. If you keep your tank full or above 3/4 it will not tag the light. As soon as it drops below that, it runs a check on the system.
Check all the vent lines to make sure one has not come off.
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RE: Engine light 2003 H2 Help... - 2/5/2008 7:26:46 PM
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pteam
Posts: 115
Joined: 1/29/2008
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Good info here.
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