Oxygen Sensor
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Junior Member

Joined: Feb 2024
Posts: 82
Likes: 9
From: South Carolina
Year: 1993
Model: Cherokee (XJ)
Engine: 2.5L
My “93” XJ 2.5 4cyl. Has an Oxygen sensor just down stream from the exhaust header, ,and a catalytic converter but no sensor downstream of it ( before the muffler) is this normal for the “93” ?
Thread Starter
Junior Member

Joined: Feb 2024
Posts: 82
Likes: 9
From: South Carolina
Year: 1993
Model: Cherokee (XJ)
Engine: 2.5L
I am aware that the OBD two was not standard until 96. But I have not seen a vehicle with just one oxygen sensor while having a catalytic converter and no oxygen sensor behind it.
CF Veteran



Joined: Aug 2020
Posts: 2,124
Likes: 578
From: SoCal
Year: 1988
Model: Cherokee (XJ)
Engine: 4.0L
My 1988 XJ has only one O2 sensor and a CAT. If you look up your XJ on Rockauto (for example) they will only list Upstream or Bank1/Sensor 1. The post CAT O2 came to the XJ in 1996.
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