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Usually the fuel cap and other leaks like that will reset after the engine has gone through a few cycles, or you can use one of the better OBD2 diag scanners to clar the code. Another easy way to clear your codes is to simply disconect the negative battery terminal for about a minute. This will clear to code. If the code comes back on then there is something else going on.

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Q: How do I solve a P0455 engine code for a 2002 jeep liberty I have fixed the hoses and replaced the gas cap now what?
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