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Not sure if I need to replace 02 sensors

Discussion in 'Prius v Technical Discussion' started by Blurredforlife, Jun 4, 2023.

  1. Blurredforlife

    Blurredforlife Junior Member

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    I've been getting 38.5 mpg lately. I did a Dr prius check..battery has 64 percent life. Got a catalyst bank 1 when running a smog check. Could it also need replacing catalytic converter? Screenshot_20230604_143041_BlueDriver.jpg Screenshot_20230604_143041_BlueDriver.jpg Screenshot_20230604_140539_BlueDriver.jpg Screenshot_20230604_143041_BlueDriver.jpg Screenshot_20230604_140539_BlueDriver.jpg
     

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    #1 Blurredforlife, Jun 4, 2023
  2. BiomedO1

    BiomedO1 Senior Member

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    Also check your ECT- (engine coolant temperature), MAF- sensor, air filter; that'll also cause you to run rich.

    How many miles on her and what maintenance has been done to her?
     
    #2 BiomedO1, Jun 4, 2023
  3. Blurredforlife

    Blurredforlife Junior Member

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    I've got around 186k on it.
     
    #3 Blurredforlife, Jun 4, 2023
  4. Tim Jones

    Tim Jones Senior Member

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    Just the rite miles for all of the bad stuff to start happening............... : (
     
    #4 Tim Jones, Jun 7, 2023
  5. SSAutomotive

    SSAutomotive Junior Member

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    Voltage readings like that is 99% of the time a failing cat. When O2 sensors fail, they'll often lag or just have weird out of range readouts on the ECU. I'd start saving for a new cat or look into cleaning. If you do buy a cat, do not buy cheap; get OEM or equivalent. If you want to clean, I'd replicate the formula best as possible for CATACLEAN using the MSDS, but up the dosage (don't get too crazy). Other folks also use acetone and other solvents, but that's your call.
     
    #5 SSAutomotive, Jun 21, 2023
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