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

    Joined:
    Mar 16, 2008
    86
    2
    0
    Location:
    Idaho
    Vehicle:
    2008 Prius
    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

    Joined:
    Mar 16, 2008
    138
    6
    0
    Location:
    S Florida
    Vehicle:
    2008 Prius
    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

    Joined:
    Mar 23, 2005
    4,089
    468
    0
    Location:
    Bahstahn
    Vehicle:
    2004 Prius
    Model:
    N/A
    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

    Joined:
    Mar 16, 2008
    86
    2
    0
    Location:
    Idaho
    Vehicle:
    2008 Prius
    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

    Joined:
    May 3, 2005
    4,096
    85
    13
    Location:
    USA | Oregon | Portland area | 97004 |
    Vehicle:
    2007 Prius
    Surely you don't want to spew more emissions into the air, do you?
     
    #5 Bill Merchant, Apr 10, 2008
(You must log in or sign up to post here.)