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O2 sensor faults even after changing sensors

Discussion in 'Wrangler JK (2007-2017)' started by skyhookman, Jun 1, 2021.

  1. Jun 1, 2021 at 7:31 AM
    #1
    skyhookman

    skyhookman [OP] Active Member

    Joined:
    Nov 1, 2020
    Member:
    #5197
    Messages:
    28
    Gender:
    Male
    southeast. ky
    Vehicle:
    2010 Wrangler sport unlimited, silver 4 door, hardtop
    was having O2 sensor faults, regularly, bank 1 sensors. Replace both sensors, checked for cracks and leaks, from header all the way down, all good. Still get O2 fault, it changed to bank 1, position 1. Decide to test old sensors, heater ohm ok, voltage come up and drops off after heat removed. Anyone know what's going on with this thing. After changing sensors, it improved to 50-50 chance it will or not come on. If it starts and light doesn't come on, I can drive 20 or 200 miles, and it stays off. next time, I start may or may not come on. Hello I don't get it. Next I will unplug sensors and at least check the heaters.
     
  2. Jun 1, 2021 at 1:33 PM
    #2
    aggrex

    aggrex Well-Known Member

    Joined:
    Sep 12, 2016
    Member:
    #203
    Messages:
    4,251
    DE
    Vehicle:
    Backcountry '16
    Tuffy>AEV>TTO>JW>STech>EVOcage>MagnaFlow>SpiderTrax>RockHard>TF>SpringTail>67design>Bolt>GPCA>Curt>
    For the vehicles in my fleet I prefer OEM O2 sensors whenever possible for best results.
     
    skyhookman [OP] likes this.

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