check engine light code po138
Thread Starter
Senior Member
Joined: Jun 2010
Posts: 517
Likes: 0
From: slidell, LA
Year: 1998
Model: Cherokee
Engine: 4.0L inline 6 cylinder
check engine light code po138
i need some help i am throwing a code in my 98 jeep Cherokee
the code is po138 it basically says the downstream oxygen sensor is reading high voltage i don't know what to do to fix it its a fairly new sensor
i appreciate any help guys
the code is po138 it basically says the downstream oxygen sensor is reading high voltage i don't know what to do to fix it its a fairly new sensor
i appreciate any help guys
Last edited by jimbo98xj; Sep 24, 2011 at 07:45 PM.
CF Veteran
Joined: Nov 2010
Posts: 5,840
Likes: 117
From: In the middle of Minnesota!
Year: 1999
Model: Cherokee
Engine: 4.0
Here you go. This place is a good source for OBD code information. Good bookmark.
http://www.obd-codes.com/p0138
http://www.obd-codes.com/p0138
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