MIL/check gas cap lights on p0457 code | Ford Explorer Forums - Serious Explorations

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MIL/check gas cap lights on p0457 code

kevinerickson84

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June 25, 2014
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Year, Model & Trim Level
2001 Explorer 4.0 SOHC
Just looking for suggestions. My 01 xls explorer has the MIL ans check gas cap light on. The code reads p0457 EVAP emission control system leak cap loose/off. I cleared the codes, waiting to see what happens! lol dumbass. Done some research on this and it sounds like a cracked hose/filler neck or purge valve? I did see a small crack on the neck where the gas cap goes but it is above where the cap oring seal seats. Lubed the o-ring up and put cap back on. Haven't really dived into this one yet, was just looking for some suggestions before I really waste my time. Thanks guys.
 






also note that it was idling funny and stalling at stops every once in a while. I changed the plugs,wires and cleaned the throttle body which made a great improvement.
 






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