Question about 1997 Jeep Grand Cherokee

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02 sensor i have a v6 97 grand cherokee and need to know if anyone knows which o2 sensor is bank 1 sensor 2? before the cat or after?

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  • mish829 Sep 15, 2008

    it is a 6cylinder sorry i was mistaken when i typed v6. the code was 0138 when i looked it up it said 02 sensor circuit high voltage bank 1 sensor 2 i just assumed it need to be replaced it failed inspection for emissions so i assumed they were related. thank you so much for your help!

  • mish829 Sep 16, 2008


  • mish829 Sep 22, 2008

    i just replaced it and it just passed inspection! thank you everyone for all your help



2 Answers

It is after the converter ,make sure you check the wiring to the sensor and make sure the connectors are free of corrosion and none of the pins are backed out. And if the converter was punched you would diffinetely fail an emissions test

Posted on Sep 21, 2008

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First of all if it is a 6 cylinder its an inline engine (4.0L). The reason I bring this up is it changes your O2 sensor configuration. Bank 1 sensor 1 ( there is only one bank because only 1 manifold) is the primary O2 sensor controlling the air/fuel ratio dependant on other sensors. Bank 1 sensor 2 is After the cataylistic converter. Depending on the code if low input or high input could be wiring and not a sensor at all. Also a low flow or high flow could indicate somebody previously "punched" the converter out or it is getting clogged due to age and mileage. Hope this helps.

Posted on Sep 14, 2008

  • mcalkins3
    mcalkins3 Sep 15, 2008

    Good to hear, please let me know if this does solve your issue. If you could kindly rate my solution that would be greatly appreciated

  • mcalkins3
    mcalkins3 Sep 15, 2008

    Let me know if this helps, if you could rate my solution it would be greatly appreciated



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The check engine light is blinking usually because of a misfire which can cause damage to the cat. The blinking check engine light does not necessarily mean the the cat is damaged.

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Bank #2 referes to the side of the eng in which cyl. #2 is snsr #1 referes to the sensor before the cat. conv. and the code is for a slow response so, basically a lazy O2 snsr. So if you can locate cyl. #2 and follow the exaust manifold on that side of eng. the very first O2 snsr you see is the one in need of diag./repair

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Dec 26, 2008 | 1996 Jeep Grand Cherokee

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