Hi! New to forum, Have a 2003 Rubicon with a 4 1/2 in. Rubicon express long arm lift, 16in. wheels, LT285 Bfg all terrains. Currently has issues at 105K Mi. and could use some help. Cel came on and I went to Autozone and got code was told possible o2 sensor. Suggested I could use fuel injector cleaner if hadn't used. So I did, and problem went away for a short time. cel came on again this time got print out and code P0137. Was going to buy O2 sensor but haven't yet. Didn't drive for 2-3 days and there was no cel on when I had to drive it and it ran fine. Later my Wife went to drive it and it wouldn't start. No cel on, all gauges fine. So I tried to start it and nothing until I gave it gas while starting, but as soon as I take my foot off the gas the engine quits. Tried again and held gas pedal for a few mins. and then it would run but lower than normal rpm and rough. Is it still just an O2 sensor or something more? Was also suggested that If I am going to replace 1 sensor, I should replace them all. Good Idea or not necessary? Any help from some experienced members would be greatly appreciated Thanks!
It could be that one (o2 code) has nothing to do with the other (keeping it running) and just coincidence. Then again it could be that the faulty sensor is sending a rich signal and causing a leaner mixture. Have you checked for fuel to the rail? As Barrie mentioned above, you will get a lot better advice by posting the question in the TJ section. To answer your other question, yes, replace all O2 sensors at the same time.
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Thanks for the info. Still haven't fixed my problem yet. I had trouble logging on to the forum so couldn't read any replies. I found out why I was having trouble with my jeep starting. I discovered that my optima battery had a bad cell and didn't have enough power to keep it running until I charged it up with the alternator. Replaced battery now starts fine. cel was out but now on and engine runs rough and has p0137 code. Now I need to start checking all the possible causes. Thanks again Steve