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Registered
1996 El Dorado
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697 Posts
Discussion Starter · #1 ·
ok i replace all the o2's in my car but two the ones in the manifolds.. just want to make sure i will get the o2 senor for both manifolds as i put before the cat rite? or is there ones design for this? i know i may have answered my own question some how but i want to make sure...
 

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Super Moderator
2010 DTS
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88,152 Posts
Not sure I understand the question. There are 4 sensors. One on each manifold and one before and one after the CAT. I think the manifold sensors are the same, but different from the pre & aft CAT sensors if that is what you are asking. I think the CAT sensors are heated and the manifold sensors are not. Someone will correct me if I am wrong.
 
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