Jeep Wrangler: O2 Heater Codes & What To Do When It’s Not The O2 Sensor!?

44 thoughts on “Jeep Wrangler: O2 Heater Codes & What To Do When It’s Not The O2 Sensor!?”

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2. I am just wondering could we connect those o2 sensor grounds to another accessible spot?

3. Awesome!! Thanks a million

4. I have a 07 Jeep Wrangler watch this video realize that I was going through the same thing thank you

5. Thanks!

6. My Jeep is in mode crankshaft position sensor on all four O2 sensors will not read

7. @southmainauto i have the same codes on my 08 wrangler. All 4 o2 sensors are showing a code. This particular jeep you were working on, did it have any hesitation at all while driving?

8. mopar most our parts are rejects ! who ever the brain trust that put that ground there behind that heat shield ! what were that thinking ? that's just it they were not ! find a better spot !

9. Hey man don't be discouraged. You taught everyone how to trouble shoot properly on 02 sensors. Those ground wire locations look like a real mofo. Just found mine are in this state and looking to reroute

10. Good job, great vid …..nice.

11. Watching this in 2025 and have to say this, along with replacing the crank position sensor, are by far the most important and useful electrical repair videos for the JK Wrangler and probably others.

12. Thanks!

13. Fantastic! methodical educational insightful. thank you!

14. 😊

15. Keep it up never let it get you down which I see it don't keep 💯 👌 it real thanks for tip wait on jeep show up now with same code

16. where is the location of the ground you fixed . driver side up above starter by catalytic converter. is that correct ?

17. It's learning experience…I am with you.

18. Eric, watching this in 2024 and you beating yourself up over this is wrong.
    This is exactly how we find ourselves in life. We stumble and fall, we get right back up.
    You did nothing wrong in this entire video.
    This is how we learn and you putting this video unedited is great to show us how we should expect some days to go.
    Keep up the excellent work!

19. I have a 2016 Wrangler with the same P0038 code. It`s a friends Jeep. I told her she could have an electrical issue and sadly electrical isn't one of my strong points. But I now have some clue as to what to look for. I have replaced the sensor 2 times just to be sure.

20. My 2009 JK had the exact same problem, watched your video and fixed it the exact same way ‘Thanks a bunch

21. Thank you so much for this video it fixed my problems with my jeep

22. This video saved me a lot of headaches mine was the same problem plus egr code fixed the ground and codes went away

23. Hi is there anyway I can get your email I am a long time subscriber I am working on a 2008 jeep wrangler 3.8 same as the one in this video I would like to send you some pictures of my O2 readings from my snap on scanner maybe you can tell me what the problem is if it is a ground issue or if it is the computer I am at a loss

24. Another great fix by Mr O.. lesson learned.

25. I can honestly say this is the best video I've ever seen on YouTube for auto repair. Why? Because it's REAL LIFE for most of us! We're all struggling to understand things that are at least in part kind of beyond our understanding. I found this video while trying to learn what a "good" o2 sensor even is. Thanks for being true and for being an awesome mechanic that kept going till the end.

26. Love the Farmall poster on the wall !

    There are many paths to a happy ending…

27. I can't believe and don't understand for the life of me why that ground location was engineered where it was. What a great video…very informative and helpful. It's a plus to all automotive repair seeing the time that's spent tracking down a pesky wiring issue and the so called mistakes along the way. Its nice to see you didn't edit them out because it helps the public understand the reason a simple ground wiring issue isn't simple at all. I've got a jeep patriot with the same problem…thank you very much.

28. Mucha gracia por el video . Mi jeep wrangler tenia el mismo problema

29. Old video but, just fix it Eric O No apologies needed. It Is What It Is Great fix and trouble shooting Eric.

30. How much does somthing like this cost to replace

31. I have been chasing a p0158 o2 2/2 dtc for a while and this video led me to my solution. I went through the service manual on my Grand Cherokee and all the testing I thought it was a broken wire (harness disappeared under transmission). I soldered in a new signal wire to o2, no help. Then after your video boom corroded ground and wires at the fender. The wires were all covered with green corrosion. Vinegar and a tooth brush later and I am going to pass inspection!!! Thanks for the help.

32. Hey Erik!! Sounds like me working on stuff. Back and forth simple mistakes make you human. That's why I like your videos!

33. Excellent!

34. Great video. No need for regret. Solid troubleshooting!

35. The ground locations on wiring diagram show upstream and down stream have separate ground locations,so fixing that one ground location on lh side of engine area fixed both upstream and down stream o2 grounding issues.great video.i learned alot..

36. Nice work.. from another Electrical Automation guy .. fixing problems after someone else's screw up insanely hard.. great work..

37. @21 min! revealed: 6 wires not connected

38. How did you solder those 6 wires to the eyelet that far deep inside there?

39. What spray cleaner do you recommend for green crustys and what is the spray film do you use on wiring?

40. Eric my mechanic saying that my PCM is bad. How often has anybody replaced one on an 07 JK

41. OUTSTANDING video! I am not being sarcastic. This video shows the frustrations of troubleshooting AND the troubleshooting was accurate. My daughter's jeep is doing the same exact thing. W those wires that close to a heat source, I can see how it baked the wires. … great video!!!

42. Look at you using the power probe. I didn't like them at first. But on Thursday it was a easy quick check on a door ajar switch on a f150.

43. Shame on how bad that o2 sensor was installed Hopefully in the future the Bung can Be fixed good work Eric O and yeah hacks make good mechanics like us look bad @SouthMainAutoRepairLLC

44. There's your problem lady you Broke All your grounds Good Video As Always Eric O @SouthMainAutoRepairLLC

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