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P0456 Code fix ideas?

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Old 09-27-2006, 01:21 AM
imnothot02 imnothot02 is offline
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Default P0456 Code fix ideas?

Tryed the gas cap[:-]...reset the computer[:-], check engine light comes on after about a week, I dont see any loose hoses or anything, checked all of them nothing looks worn or cracked, this is all on a 2002 dodge dakota slt 4.7l v-8
2002 Chevy Trailblazer LT 4.2
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Old 09-27-2006, 02:18 AM
The Burning Rom The Burning Rom is offline
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Default RE: P0456 Code fix ideas?

Did you replace the gas cap with a Mopar gas cap? It's very common with the Dakotas.

From what I understand, this is also a code that's common.

There's more info on it here: http://www.obd-codes.com/forums/454-...ge-dakota.html
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Old 10-07-2006, 04:07 PM
timwag2001 timwag2001 is offline
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Default RE: P0456 Code fix ideas?

check where the gas cap screws on. look for any corrosion. also where the stem from the tank meets the underside of your bed. do you smell any gas odors at any time?
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Old 09-06-2007, 07:34 PM
middletone middletone is offline
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Default RE: P0456 Code fix ideas?

my 02 stratus has the code 0456..will that cause a leak in the ac system. i just filled the ac with 2 tanks of freon today..3 hrs later..blowing hot air again..


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Old 09-06-2007, 09:15 PM
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Default RE: P0456 Code fix ideas?

Open the hood, on the left side of the engine, look for a series of vacuum lines. You will see a cap on a valve with several vacuum lines coming to it. Inspect all of the hoses and replace any cracked ones. Also look at the hoses under the bed that go to the vapor canister. Replace any hoses that are cracked or split.... Very common problem.....
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Old 09-06-2007, 10:53 PM
dishdude2k dishdude2k is offline
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Default RE: P0456 Code fix ideas?

no.. the evap code has NOTHING to do with your a/c leaking freon... if you have a blacklight .. go to the parts store and get some dye to put in.. then run it dry again.. use that black light to find the leak.. more than likely the high side line.. or a fitting needs to be tightened
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