A place to discuss hardware/software and diagnostic procedures

P0401,p0455,p0456 2008 dodge caravan testing ESIM

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3 years 3 months ago #45474 by bizz2222
Is there an easy way of testing the esim in the evap system on a 2008 dodge caravan I have the 3 codes listed in the heading ? Can I take it off the van and test it like an purge valve ? I don't think I actually have a leak because when I take the gas cap off I can hear a little pressure/suction release. Any help would be appreciated. Thanks

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3 years 2 months ago #45575 by bandrauto
take hose off, blow into and see if it goes from open to close. force vehicle to run large evap test with scanner. should go from open to close quickly. if it doesnt, and all your wiring is good, the esim is bad.

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