Hootbro
Well-Known Member
Probably a pending P0456 or P0457 code for a small EVAP leak detected. Most newer vehicle will flash the check gas cap message for the first time it sees the code pending and then post the hard CEL with the same code as actually posting on successive drive cycles if the small leak continues.If you run the code on a loose gas cap cel, what will it show? Something related to the evap. system maybe?
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