# o2 sensor removal or relocate?? **URL:** \ **Category:** NYSpeed Automotive\ **Created:** [July 14, 2009, 8:01am UTC](https://forums.speedlife.net/t/o2-sensor-removal-or-relocate/70515 "2009-07-14T08:01:29Z")\ **Posts on this page:** 14\ **Page:** 1
**Author:** ![RENEGADE](https://avatars.discourse-cdn.com/v4/letter/r/b4bc9f/32.png) [@RENEGADE](https://forums.speedlife.net/u/RENEGADE)\ **Post date:** [July 14, 2009, 8:01am UTC](https://forums.speedlife.net/t/o2-sensor-removal-or-relocate/70515/1 "2009-07-14T08:01:29Z")
My 2000 civic just had a new stainless header back system put on. The person who welded it together flipped the test pipe/converter and the o2 bung is facing the ground. The car is lowered so with the sensor in it will smack the ground if i hit a bump. My question is could i just use a 90\* elbow and insert the sensor without a problem since that o2 is just a monitor and wouldn’t cause driveability issues or will it not read? Any help would be great since i don’t have any time to deal with this screw up. Thanks ---
**Author:** ![RENEGADE](https://avatars.discourse-cdn.com/v4/letter/r/b4bc9f/32.png) [@RENEGADE](https://forums.speedlife.net/u/RENEGADE)\ **Post date:** [July 15, 2009, 6:59am UTC](https://forums.speedlife.net/t/o2-sensor-removal-or-relocate/70515/2 "2009-07-15T06:59:17Z")
UPDATE: Found out my header has a bung that’s capped off, would it matter to move it before the converter? ---
**Author:** ![newman](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/newman/32/7569_2.png) [@newman](https://forums.speedlife.net/u/newman)\ **Post date:** [July 15, 2009, 7:08am UTC](https://forums.speedlife.net/t/o2-sensor-removal-or-relocate/70515/3 "2009-07-15T07:08:11Z")
The secondary O2 sensor is basically just a monitor for the cat. If you move it before the cat, it will think the cat is bad and throw a CEL. If you move it pre-cat, you can do the spark plug antifouler trick, but it may still throw a CEL. EDIT: [http://forums.evolutionm.net/1505717-post2.html](http://forums.evolutionm.net/1505717-post2.html) ---
**Author:** ![Studderin](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/studderin/32/7197_2.png) [@Studderin](https://forums.speedlife.net/u/Studderin)\ **Post date:** [July 15, 2009, 7:20am UTC](https://forums.speedlife.net/t/o2-sensor-removal-or-relocate/70515/4 "2009-07-15T07:20:17Z")
vBulletin Message You have been banned for the following reason: multiple accounts/troll Date the ban will be lifted: Never ☹ ---
**Author:** ![OfficerK](https://avatars.discourse-cdn.com/v4/letter/o/4da419/32.png) [@OfficerK](https://forums.speedlife.net/u/OfficerK)\ **Post date:** [July 15, 2009, 7:28am UTC](https://forums.speedlife.net/t/o2-sensor-removal-or-relocate/70515/5 "2009-07-15T07:28:19Z")
Wait juat? I was gonna say I have an 02 defouler that I don’t need anymore. . . ---
**Author:** ![RENEGADE](https://avatars.discourse-cdn.com/v4/letter/r/b4bc9f/32.png) [@RENEGADE](https://forums.speedlife.net/u/RENEGADE)\ **Post date:** [July 15, 2009, 7:34am UTC](https://forums.speedlife.net/t/o2-sensor-removal-or-relocate/70515/6 "2009-07-15T07:34:30Z")
here is a pic of what i mean. ---
**Author:** ![Pauly](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/pauly/32/7493_2.png) [@Pauly](https://forums.speedlife.net/u/Pauly)\ **Post date:** [July 15, 2009, 7:37am UTC](https://forums.speedlife.net/t/o2-sensor-removal-or-relocate/70515/7 "2009-07-15T07:37:10Z")
Technically that should throw a CEL for low cat effeciency. ---
**Author:** ![OfficerK](https://avatars.discourse-cdn.com/v4/letter/o/4da419/32.png) [@OfficerK](https://forums.speedlife.net/u/OfficerK)\ **Post date:** [July 15, 2009, 7:47am UTC](https://forums.speedlife.net/t/o2-sensor-removal-or-relocate/70515/8 "2009-07-15T07:47:14Z")
> [@RENEGADE](#): > > here is a pic of what i mean. Yeah that should throw a CEL, you can try a defouler, but that might not always work. Also you can try and insert a resistor to try and trick the computer that way… lemme see if I can find a link to that method… this is for a Mazda3, but should be fairly universal > **[General: How-To - MIL / CEL Eliminator - Mazda3Club.com : The Original Mazda3...](https://www.mazda3club.com/how-tos-96/general-how-mil-cel-eliminator-44407/)** > > How-To's - General: How-To - MIL / CEL Eliminator - PLEASE MAKE THIS A STICKY or Locate to the How To! I have seen lots of questions about how to make your own MIL/CEL Eliminator.. Well its really simple! Tools Needed: Wire Cutters Soldering Iron... ---
**Author:** ![RENEGADE](https://avatars.discourse-cdn.com/v4/letter/r/b4bc9f/32.png) [@RENEGADE](https://forums.speedlife.net/u/RENEGADE)\ **Post date:** [July 15, 2009, 7:58am UTC](https://forums.speedlife.net/t/o2-sensor-removal-or-relocate/70515/9 "2009-07-15T07:58:15Z")
Thanks for the info. Ill try moving it and using a defouler and post results today. ---
**Author:** ![harvboi05](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/harvboi05/32/5124_2.png) [@harvboi05](https://forums.speedlife.net/u/harvboi05)\ **Post date:** [July 15, 2009, 12:22pm UTC](https://forums.speedlife.net/t/o2-sensor-removal-or-relocate/70515/10 "2009-07-15T12:22:23Z")
can you get a bung welded into the exhaust behind the cat? that should be a quick and easy fix at any muffler shop. ---
**Author:** ![95dime](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/95dime/32/7514_2.png) [@95dime](https://forums.speedlife.net/u/95dime)\ **Post date:** [July 15, 2009, 2:16pm UTC](https://forums.speedlife.net/t/o2-sensor-removal-or-relocate/70515/11 "2009-07-15T14:16:48Z")
why dont you just take it back to the dumbass that welded the pipe in that way, have em cut it out turn it 90 degrees and weld it back in? itll take all of 30 minutes on a lift and itll work the way it was meant to. ---
**Author:** ![black02satsc2](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/black02satsc2/32/5259_2.png) [@black02satsc2](https://forums.speedlife.net/u/black02satsc2)\ **Post date:** [July 16, 2009, 7:01am UTC](https://forums.speedlife.net/t/o2-sensor-removal-or-relocate/70515/12 "2009-07-16T07:01:05Z")
> [@95dime](#): > > why dont you just take it back to the dumbass that welded the pipe in that way, have em cut it out turn it 90 degrees and weld it back in? itll take all of 30 minutes on a lift and itll work the way it was meant to. thats what i was going to say… should have put it in the right way the first time, no need for you to have to dick around with something they did wrong. ---
**Author:** ![Jeller](https://avatars.discourse-cdn.com/v4/letter/j/bc8723/32.png) [@Jeller](https://forums.speedlife.net/u/Jeller)\ **Post date:** [July 16, 2009, 7:17am UTC](https://forums.speedlife.net/t/o2-sensor-removal-or-relocate/70515/13 "2009-07-16T07:17:32Z")
Sooo is the pipe with the bung a test pipe or a cat? you keep calling it both? and if it is a test pipe, no matter where the bung is you will need something to fool the second 02 sensor, no matter its location. I would use the anti fouler method, as it has worked well for me in the past on a couple of cars. ---
**Author:** ![RENEGADE](https://avatars.discourse-cdn.com/v4/letter/r/b4bc9f/32.png) [@RENEGADE](https://forums.speedlife.net/u/RENEGADE)\ **Post date:** [July 16, 2009, 8:36am UTC](https://forums.speedlife.net/t/o2-sensor-removal-or-relocate/70515/14 "2009-07-16T08:36:28Z")
^ its not just a straight test pipe. It is a magnaflow hi-flow converter. Before the full exhaust was changed the previous stock converter was hollowed out and no CEL was on. As far as taking it back to the guy to redo it, i have already gotten my money back for the hack work and just trying to get it driveable until i can take it elsewhere.