Check Engine Evap Sensor '03 3.7L -
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Go Back > Models > Jeep Liberty Forums > KJ Liberty Forum > Check Engine Evap Sensor '03 3.7L

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Unread 01-04-2010, 06:36 PM   #1
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Join Date: Apr 2007
Location: Syracuse
Posts: 9
Check Engine Evap Sensor '03 3.7L

Can someone give me a good checklist to go through when clearing up this code. I had it checked at autozone and of course forgot the exact code. Its definitely the evap emissions causing the light to come on. Not the cap as I made sure it was securely on by rotating several clicks. I noticed that the check engine light goes out if I fill the tank. Only when the level gets below half that the light comes back on.

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Unread 01-04-2010, 06:41 PM   #2
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2002 KJ Liberty 
Join Date: Dec 2009
Location: Colorado
Posts: 8,093
The best way(and most times the only way) to properly diag a EVAP system is by having a smoke test done at a shop.
'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
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