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Old 03-14-2012, 07:18 PM   #1
Join Date: May 2011
Posts: 18
check engine light

Hey jeepers, I have a 98 tj 4.0l.gunna change upstream 02 sensor. throwing code p0138.Changed plugs,wires,distributor cap no change. Just wondering if ngk direct fit are ok to use. any input would be welcome. Thanks again for the help, this site is great for new jeep owners trying to figure things out,

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