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2002 Jeep 4.0 EVAP issue. #4725725
04/13/18 11:10 AM
04/13/18 11:10 AM
Joined: Oct 2017
Posts: 512
Northeastern Vermont
littleant Offline OP
littleant  Offline OP
Joined: Oct 2017
Posts: 512
Northeastern Vermont
2002 Jeep 4.0 165,000 miles EVAP issue. About 6 months ago engine light came on. Hooked my scanner and it showed code P0455 perminet code large evap leak and pending code small evap leak P0442. To brutal of a winter so working on it now. Changed the gas cap cheap and easy. Erased codes but came back in 2 weeks. So there is a green cap that says evap test port. Is this used for smoke machine??. Can I put low air pressure say 10 psi through it or will it damage something. Inspection coming up end of month. Thanks guys

Last edited by littleant; 04/13/18 11:22 AM. Reason: spelling

I can't prevent getting old but I REFUSE to grow up.
2010 Mountaineer 4.0
2002 Jeep Wrangler TJ 4.0
Re: 2002 Jeep 4.0 EVAP issue. [Re: littleant] #4725739
04/13/18 11:26 AM
04/13/18 11:26 AM
Joined: Jun 2003
Posts: 17,842
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,842
Deplorable in apple valley, ca
Check the hoses under the hood. Thats where mine rotted off from.


02 Wrangler carlube 5w30
87 F250 traveler 15w40
07 fjcruiser Chevron 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40

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