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Resistor Value for CAT when hot

Discussion in 'Gen 2 Prius Technical Discussion' started by MR.K, Apr 6, 2008.

  1. MR.K

    MR.K Junior Member

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    Anyone know the resistor value of the Cat sensor when it's hot? The motor cycles to keep it hot ..
     
    #1 MR.K, Apr 6, 2008
  2. racerbob

    racerbob Member

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    I don't think it works that way. I think cat temp is calculated from run time and the post cat O2 sensor. They work most efficiently at 600 deg F and higher. Post cat sensor on a Prius doesn't stay at any fixed value that can be easilly generated to fool the ECU.
     
    #2 racerbob, Apr 9, 2008
  3. hobbit

    hobbit Senior Member

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    Correct -- there's no actual sensor for cat temp, it's inferred.
    There are AF/O2 sensor heaters, that's about it...
    .
    _H*
     
    #3 hobbit, Apr 9, 2008
  4. MR.K

    MR.K Junior Member

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    Thanks ...just thought you could fool it so the ICE would not run to keep it warm ....
     
    #4 MR.K, Apr 10, 2008
  5. Bill Merchant

    Bill Merchant absit invidia

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    Surely you don't want to spew more emissions into the air, do you?
     
    #5 Bill Merchant, Apr 10, 2008
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