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More detail for repair for code PO138 on 1999 Infiniti QX4

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
want to know repair steps for code PO138
(2) Answers
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this code could be many issues not just a sensor,seek diag and est
O2 sensor voltage too high repair procedure is available...
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