More detail for repair for code PO138 on 1999 Infiniti QX4

want to know repair steps for code PO138

by in Oakhurst, CA on November 06, 2012
2 answers
ANSWER by , November 06, 2012
this code could be many issues not just a sensor,seek diag and est
ANSWER by , November 06, 2012
O2 sensor voltage too high repair procedure is available...