O2 Sensors in a Hot Rod Set-up
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Northstar Engines and System Technical Discussion Discussion, O2 Sensors in a Hot Rod Set-up in Cadillac Engine Discussion; I'm putting a 2005 SRX LH2 engine in my hot rod and just came to the realization that I may ...
  1. #1
    jwatches is offline Cadillac Owners Member
    Automobile(s): 2005 SRX
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    May 2014
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    O2 Sensors in a Hot Rod Set-up

    I'm putting a 2005 SRX LH2 engine in my hot rod and just came to the realization that I may need all four O2 sensors, even though I am not running the catalytic convertors. I was hoping to run just two sensors. Can anyone help me understand how to run two O2 sensors and wire them to work with the existing ECM?

    I have attached the factory wiring schematic. Clearly different sensors front and back.

    Attached Files

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  3. #2
    SRG963's Avatar
    SRG963 is offline Cadillac Owners Fanatic
    Automobile(s): 2010 SRX LUX
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    Re: O2 Sensors in a Hot Rod Set-up

    HPTuners?

    You can change the sensors and catalyst to not report the CEL (option 3)

  4. #3
    jwatches is offline Cadillac Owners Member
    Automobile(s): 2005 SRX
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    Thread Starter

    Re: O2 Sensors in a Hot Rod Set-up

    PCM Performance did my ECM and he says I need to use the front O2 sensors. They use a six wire connection. I think I can run that way w/o reprogramming the ECM.

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