98' xj check engine

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Apr 15, 2015 | 04:38 PM

Jbri22

Thread Starter

Junior Member

Joined: Apr 2015

Posts: 41

Likes: 0

Model: Cherokee

Engine: 4.0

98' xj check engine

My 98 XJ check engine light went off the other day. Ran a test and got PO138(O2 sensor high voltage bank 1 sensor 2) my O2 sensor is brand new and just replaced. Got under the rig to see if any wired was frayed or
Damaged to find nothing. What else should I be looking for? Does sensor 2 meaning it's a problem running to the cat? Any advice would be great.
Thx

Apr 15, 2015 | 06:11 PM

tommyxj2000

Senior Member

Joined: May 2009

Posts: 887

Likes: 0

From: dingmans Ferry, PA

Year: 99

Model: Cherokee

Engine: 4.0

Manufacturer of o2 sensor? i know jeeps aren't too crazy about bosch sensors

Apr 15, 2015 | 07:00 PM

Jooman07

Senior Member

Joined: Sep 2014

Posts: 625

Likes: 3

From: Austintown, OH

Year: 2000

Model: Cherokee

Engine: 4.0

If you change one then you usually have to change the other as well. And if it's a Bosch then you might as well take it out. NTK is the one people here will recommend and I will too. Changed both my bank 2 sensors with NTKs.