99 and 01 o2 sensors
01-09-2011, 09:10 PM
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Model: Cherokee
99 and 01 o2 sensors
I have a 99 and an o1 xj. From what I can tell the 99 has 2 o2 sensors and the 01 has 4. Can anyone verify and explain this. I would have thought the 2 vehicles would be the same. Thanks!
01-09-2011, 09:17 PM
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Year: 1998
Model: Cherokee
Engine: 4.0
Yes that is right. My 00 had 4. I believe the exhaust manifolds are different and it uses one 02 sensor for 3 cylinders and another one for the other 3. I am sure it has to do with emissions crap and fuel economy. Or maybe jeep just wasn't selling enough 02 sensors using only 2. Decided to double the chances of a 02 sensor falling.
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