how many o2 sensors on 91 explorer | Ford Explorer Forums - Serious Explorations

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how many o2 sensors on 91 explorer

ducksplus

Active Member
Joined
September 29, 2005
Messages
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City, State
arkansas
Year, Model & Trim Level
91 xlt 4x4
how many and where are o2 sensors on 91 explorer...
 



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there is only one..when i pulled the tranny out of mine, i had to undo one oxygen sensor, and it's before the cat none after
 






Yep, '91 only has one O2 sensor.
 






jimabena74 said:
should only be 2

should be one in the y-pipe and one in the manifold
 






mitch: Your '94 does indeed have two: one in the y-pipe and one in th edriver's manifold. This started in '93. '91-'92 (and Federal '93, I believe) had only one O2 sensor -- the one in the Y-pipe.
 






oh, my bad
 






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