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code p0138, O2 sensor help on 4.0L

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Old 11-19-2012, 05:20 PM
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Default code p0138, O2 sensor help on 4.0L

my 2000 cherokee sport 4.0L got a check engine light this week. I scaned it with my obd2 scanner and it has 1 code. p0138. says rear o2 sensor problem. I went to rockauto.com to order one and there are multiple choices and I dont know what to order.

I am guessing I need this one. BOSCH Part # 13138 without California Emissions; Downstream

anyone who knows more about this chime in. i just want to make sure i order the right one.
Old 11-19-2012, 05:28 PM
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NTK is the best brand of O2 sensors for post-Renix XJs. NTK 23099
Old 11-20-2012, 07:40 AM
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ok thanks! the searching i did for NTK is the same number you posted. I'll order it today.
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