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1999 accent code PO455

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i have a code PO455 did a smoke test and no leaks. Changed the gas cap and the vapor canister and vent valve. Reset and after driving the MIL light came back on.

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The evap system requires a sealed system to work properly...could be alot of things from a leaking fuel pump/sender gasket to something broken, you will have to have someone look at it

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