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Thread: Why o2s is not ready and poor mpg

  1. #1
    Potential Tuner
    Join Date
    Jul 2015
    Location
    Massachusetts
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    1

    Why o2s is not ready and poor mpg

    I'm wondering if these parameters are normal for o2 sensors. The B1S1 and B2S1 voltage is bouncing between .07 to .70 v where as the others, (B1S2, B2S2) downstream hold steady at .700v. The OBD2 I/m shows only the o2s as Not Ready and has been that way for sometime. There's no DTCs. Mpg is very bad for a 2012 impala . Still learning the basics. Can anyone shed some light on this?
    -Rick
    Last edited by Ricksteradio; 07-09-2015 at 08:56 PM.