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> 7afe CEL code w/out 2nd o2 sensor, CEl code 2 weeks after installing a header without the 2nd o2 sensor.
post Apr 4, 2010 - 10:14 AM
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Tuminatuh



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Joined Apr 4, '10
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I apologize if this has been asked before. The search function is practically worthless since I can't search the term "o2" and every search I tried brought about 25 pages of results (none of which helped me).

I installed my aftermarket header about 2 weeks ago. Since there is no place for the 2nd o2 sensor, I simply unplugged it. Just this morning, it threw a CEL code (code 21: oxygen sensor).

I want to know if any performance is going to be lost from not having the 2nd o2 sensor plugged in. From what I understand its job is to simply make sure the cat is functioning.

Also, if it matters, my '95 7afe has an intake and is also straight-piped.

- Tum

This post has been edited by Tuminatuh: Apr 9, 2010 - 7:55 PM


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Posts in this topic
- Tuminatuh   7afe CEL code w/out 2nd o2 sensor   Apr 4, 2010 - 10:14 AM
- - Bitter   you CAN read it, just need a paperclip.   Apr 4, 2010 - 11:48 AM
|- - Tuminatuh   QUOTE (Bitter @ Apr 4, 2010 - 12:48 ...   Apr 6, 2010 - 12:55 PM
- - Bitter   search   Apr 6, 2010 - 8:06 PM
|- - mgnt232   lol everyone freaks about the search button. the c...   Apr 7, 2010 - 12:15 AM
- - Bitter   google   Apr 7, 2010 - 7:13 AM
|- - Tuminatuh   QUOTE (Bitter @ Apr 7, 2010 - 8:13 A...   Apr 8, 2010 - 12:52 PM
- - Bitter   i can't tell you any better than its already b...   Apr 8, 2010 - 10:11 PM
- - Tuminatuh   QUOTE (Bitter @ Apr 8, 2010 - 10:11 ...   Apr 9, 2010 - 7:53 PM


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