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  #1  
Old 06-24-2011, 06:23 PM
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Default P0455 need help

got in my ram today and got a half mile from my house and my check engine light came on. turned around went home and scanned it and it came up with code P0455 evaporative system leak . i googled it and some places said it could be the gas cap, charcoal canister ??? <--- . called my local parts store and they said it could be a vacume line or somthing.

but im hearing what kinda sounds like a tick when i stand next to the drivers side front fender, it's not it's normal tick either so im really concearned cuz i have to take a trip to North Carolina a week from today.

thanks for any input
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Old 06-24-2011, 06:40 PM
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Is it a hissing sound? Maybe check around the PCV valve. for leaks or slight sign of oil?
Also follow through to make sure its not the gas cap and surrounding lines as it very well could be it.
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Old 06-24-2011, 07:22 PM
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i wouldnt exactly say hissing, more like an added tick. it does it the same time the normal tick happens, i did clear the code with my tuner and it hasnt came back on yet only drove a mile or so though.
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Old 06-24-2011, 09:35 PM
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A hard code will set after 3 starts if the fault persists.

The info you have there is correct. The Evap system is a cannister, a set of hoses and connects to the fuel tank. If your gas cap is loose, or if the gas cap seal has worn out or is defective, it will set this code.

So will a leak in any of the hoses to and from the fuel tank.
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Old 06-24-2011, 10:05 PM
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i decided to check the gas cap, it wasnt screwed on at all, screwed it back on took it for a ride and nothing has happened yet, if nothing comes up with in the next few days should i still take it in for a smoke test ?
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Old 06-24-2011, 11:31 PM
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Dont bother with the smoke test.

9/10 times its the gas cap. Next would be the 2 hoses that go to the canister, they can get ripped or old with age and cause a leak in the system.
Another is that you can over fill your tank and fuel finds its way into the canister, its more of a known issue with cars then trucks, but it can happen. It causes a blockage and throws a code.

Delt with numerous Evap system codes over the years. Good luck.

If it does come back, start with a new gas cap, cheap and easy, as the seals are known to evenutally go
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