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This post replaces a post for a my nonexistant p1492 code. That isn't a code but the year Columbus Sailed the Ocean Blue.

P1457 emission control system leak detected (EVAP canister system)

Gas cap seal is new. Replaced EVAP canisister shut valve solenoid. (Unnecessary). I don't want to waste time and money throwing parts at this; I need to find a way to troubleshoot this leak.

Thank you.
 

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You can try to run your tank down to fuel warning light come on, fuel up the tank with premium higher octane clear the code and see any differrent. Same case with me, now I just stuck with premium. Hope that would help!
 

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Find a mechanic who can do a smoke test of the tank.
 

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Check the EVAP Canister Purge Valve (in the engine bay). Also check the EVAP Bypass Solenoid Valve and test the EVAP Canister (under the van).
 
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