And see what you think. Any constructive input would be appreciated. About a month ago jeep was stuttering or hesitating 3rd thru 5th low end of gear. Engine light came on. Got p0430. I put some gas treatment in. Jeep ran smoother i reset the computer, and a day or two later i got p0455. I bought a new gas cap hoping it would fix it cheap. A couple of days later i got p1129 and it started stuttering again, but then it quit but reaction was crappy.Thats been an intermittant code for a week or so. Was going to take it to galeana today but the light went off again. How do these codes relate. I think it could be the catalytic converter, but i was wondering if that was the first time i ever put gas treatment in( i only have 28000 something miles on it) could it still be gunk or something burning through causing the codes. The light hasnt come back on today and it seems to be grabbing gears alot better. Its a 2010 wrangler sport. Thanks