It's called heater circuit because the O2 sensor has a heating element in it to get it up to proper operating temperature faster so that it can monitor the exhaust gasses much sooner.mannyssj13 said:so pretty much i just need a new 02 sensor? Why is it called heater circuit then?
Any kinda of 02 sensor or just any 02 sensor meant for a wrangler good enough reason i ask I'm on rockauto.com right now and see tons of 02 sensors some say Front; Post-Cat (Downstream),Upstream Sensor; Rear,Downstream Sensor; Front just confusing sorry if it a stupid question.Yes...
I never have.Leeroy Jeepkins said:i forget.when i replaced my O2 sensor did i need to unplug my battery so when i restarted it the computer would recalibrate itself? maybe it was my idle air control i'm thinking of.anyway, do you need to unplug the battery for a few after replacing the O2 sensor?
Thanks this really helped out a lot!willybTJ said:I got the same code a couple weeks ago.....P0135 on my '04 TJ Sport. I have experienced no change in performance, sound from exhaust or any odd smells (outside of the Jeep smellin' like awesome everyday since I've owned it) that I've been able to tell....not that I should have or would even know/realize. I have recently changed my air intake & exhaust which I've read that people have gotten similar errors after exhaust changes....who knows. The engine light has also only appeared on two different days when the weather has been the coldest (at least for Texas); but then when it warms up it goes away.
So, from the info on these forums (as well as the link below) I'm about to order the #23137 (NGK) from Rock Auto $45.79 plus $2.31 shipping.....$48.10 total. Bank 1 sensor 1, pre-cat upstream front o2 sensor. Will post the results once installed and time for the code to clear.
Here is the list that completely cleared my confusion as far as part numbers, once I knew which one it was telling me to change.
Oxygen 02 Sensor FAQ and Information - JeepForum.com
What brand sensors did you put in?I'd like to pick up on this old thread. My truck had this code, both 02 sensors were replaced. I had the code cleared, and it stayed off for a day, three or four starts total. It came back on. I had it cleared again, and it again lasted for another day, but this morning, the light is back on. Is there any other part of the circuit I should be diagnosing?