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o2 sensor I.D.

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Old Jun 6, 2010 | 07:45 PM
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Default o2 sensor I.D.
What is the difference between the pre-cat o2 sensor an the post? The only thing I can see is the length of the wires.
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Old Jun 7, 2010 | 06:47 PM
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pre..is before the cat...
post is after
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Old Jun 7, 2010 | 08:08 PM
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/\ /\ /\ /\
You learn that in school?

Now does any body know if there is a difference between the two besides the length in wire?
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Old Jun 7, 2010 | 08:19 PM
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Yes, the pre-cat O2 is heated, the post-cat isn't heated.
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Old Jun 8, 2010 | 02:36 AM
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They're both heated (see pins C and D in HO2S connectors in attached wire diagram)...

On F-body, 3 of the sensors are the same; the 4th one has a different length sub-harness but is otherwise the same.

On Y-body, the connectors might be different (I'm not sure).
Attached Thumbnails o2 sensor I.D.-700034.gif  
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Old Jun 8, 2010 | 07:36 PM
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oh, i learned something today. Didn't know the post cats were heated.
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Old Jun 8, 2010 | 07:41 PM
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I knew I could count on you guys. Thanks a bunch!
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