Question about 1996 Jeep Grand Cherokee

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Po455 EVAP leak detection monitor what does that mean

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The gas cap needs to be checked.Either its loose or its faulty.The pressure is getting leaked so the p0455 error code for EVAP is showing up.The error is related to gas cap. Check gas cap.Thanks.Helpmech.

Posted on Nov 13, 2010

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  • Expert
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Evap system monitors the pressure of the fuel tank . usually a couple pounds.. this can be checked under the hood by finding the shradder valve towards the driver side,, it will have a green cap on it... keep in mind if you leave fuel fill cap loose it will set code also bad gasket on fuel fill cap will do same and is an easy fix

Posted on Nov 13, 2010

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Posted on Jan 02, 2017

ghost45
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SOURCE: 2000 elantra po455 code evap emission control

Large leak?... Fuel Cap not tight or the wrong one is installed. Also, the charcoal canister close valve may be stuck 'open' AND/OR the purge control solenoid valve may be stuck 'closed.'

Posted on Oct 18, 2009

czaa
  • 4514 Answers

SOURCE: evap large leak detected. troubleshoot

the charcoal canister that absorbs the fumes is in engine area-u see a hose attached to it ina corner--inspect hose rite down to the gas tank as well as all parts of system--itz an EPA thing and doesnt effect car performance

Posted on Oct 05, 2010

  • 1341 Answers

SOURCE: 2004 Mazda RX-8 PO455

It will not go off by itself,you will need to reset it by connecting to a diagnostic tool.Once cleared if there is any other problem then it will trigger the check engine light again.Hope this helps..

Posted on Sep 03, 2009

  • 37 Answers

SOURCE: 2004 Chevy Cavalier 2.2 eco Automatic 94,000 miles

in my experience the usual culprit is the evap cannister. the problem is it gets moisture in it and freezes during winter thus cracking the plastic. if you lay under the car and look at the evap box it black plastic and if you see a loose or cracked hose or the box itself is cracked that is most likely it. as a side note you can check the gas cap and buy a new one to see if that rectifies the situation. lastly i don't think the gas tank should be suspect as you would probably notice if gas was leaking out of the tank. if you take the car to a dealer or shop they can do a smoke test and determine where the leak is.

Posted on Oct 19, 2010

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What can i do po455 code


P0455 CHEVROLET - Evaporative Emission Control System Leak Detected Gross Leak3xicon.jpghttp://engine-codes.com/p0455_chevrolet.htmlForum CodePossible causes- Missing or loose fuel cap
- Incorrect fuel filler cap used
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the charcoal canister that absorbs the fumes is in engine area-u see a hose attached to it ina corner--inspect hose rite down to the gas tank as well as all parts of system--itz an EPA thing and doesnt effect car performance

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It will not go off by itself,you will need to reset it by connecting to a diagnostic tool.Once cleared if there is any other problem then it will trigger the check engine light again.Hope this helps..

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