V6 (1994-2004) Mustangs Technical discussions on the 3.8L and 3.9L V6 torque monsters

02 sensor?

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Old Sep 1, 2008 | 08:09 PM
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YAYITSJEWDAY87's Avatar
YAYITSJEWDAY87
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Default 02 sensor?

ok i got the x pipe with no cats so it throws codes but they were on to begin with my question is should i buy new o2's or is it pointless since the lack of cats and i bought the mil eliminators and they didnt work for me but im tired at looking at that light and want it off
Old Sep 1, 2008 | 08:50 PM
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did you get the computer reset after you installed the MILS?
Old Sep 1, 2008 | 09:20 PM
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Do you have the Front 02 sensor's as that will cause a check engine light MILS work on the rear 02 sensors.

I would also try to reset the computer.
You can just remove the negative cable or do a hard reset which is remove negative cable and touch it to the positive cable for 30 sec's then wait about 2 min then reconnect the negative cable. We do this alot at the dealer to reset all the computers.
Old Sep 1, 2008 | 10:58 PM
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YA I have front o2's in but no front cats and ya i reset the code it comes back everyday
Old Sep 2, 2008 | 12:29 AM
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the front o2 sensors are on the manifolds/headers, if you ment rear o2s and no cats then that will set the light off, you need MILS for the rear
Old Sep 2, 2008 | 05:50 PM
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yes i have the o2's in the front in and rear but only the mils on the back and still a light
Old Sep 2, 2008 | 05:56 PM
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what is the code number
Old Sep 3, 2008 | 12:29 PM
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Post the codes!
Old Sep 3, 2008 | 05:42 PM
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Originally Posted by YAYITSJEWDAY87
YA I have front o2's in but no front cats and ya i reset the code it comes back everyday
you shouldnt get any codes from a catless x pipe ive had one on my 96 and sold to my friend with a 02 no problem with check engine light
Old Sep 7, 2008 | 12:32 AM
  #10  
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sry about the delay i will post codes when i wake up been out of town all week



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