PO442 EVAP Emission Leak - Jeep Wrangler Forum
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Old 01-23-2006, 11:25 PM   #1
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PO442 EVAP Emission Leak

Fellow crawlers,

I've been fighting the infamous CEL (Check Engine Light) since buying my 1998 Wrangler, with some success until recently. I used a friends nifty reader to find the related code is "PO442 EVAP Emission Leak (Small)".

There are some interesting symptoms related to the CEL; it comes on only when my fuel level falls below quarter tank, and may (emphasis on the may) go off after a couple of refills as long as I never let it drop below quarter full. I also over-filled the tank one time and gas came out from the top of the tank, and not from the filler (freaked out the lady next to me :o )

Where should I start looking to fix the leak? Internet research shows it could be as simple as the gas cap, or as time consuming as the o-ring on the fuel pump.

TIA,

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