Okay so I'll break this down list wise how I can remember it. I started the jeep and saw an engine light. Drove my step daughter to her church group where I shut it off momentarily to see if it cleared the code, no-go. Drove down the parking lot and shut it off again to check the code by clicking the key on off where it said it had a P 0138. Started it up and checked the forum to find it's probably a bad downstream o2 sensor. Drove home, parked and shut it off then decided to get the sensor right away do I went to the parts store and got the sensor plus a bottle of injector cleaner fuel additive just for good measure. Then drove to top off the tank and put in the additive. This is where it gets weird, after adding the additive and filling the tank I turned it on and the SES light was off and stayed off. Anyone else ever had the code just shut itself off like that?
P.S. Sorry for being so long winded :smiley: