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What is DTC code P0456 on a 2003 Dodge Ram?

Updated: 10/21/2022
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Johnwheeland

Lvl 1
15y ago

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It's a small leak in the eveporative system. It could just be a loose or damaged gas cap. If that doesn't fix it, look under the truck just forward of the gas tank. There's a U shaped hose on the evaporative cannister that frequently erodes from gas vapors. It's an $8.00 dealer part and it's real easy to replace.

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Q: What is DTC code P0456 on a 2003 Dodge Ram?
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