2010 Emissions Drive Cycle Won't Complete

Discussion in 'Gen 3 Prius Main Forum' started by Coolguy6969, Nov 24, 2022.

  1. Coolguy6969

    Coolguy6969 New Member

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    Location:
    california
    Vehicle:
    2010 Prius
    Model:
    Two
    I installed a new battery after the car sitting for a couple of months.
    Wasn't aware that this clears the drive cycle info and failed a smog check as a consequence.
    I've driven well over 200 miles trying to get the cycles to complete, however when reading the drive cycle information with OBDII I can't get these specific cycles to complete.

    Catalyst
    Evaporative System
    Oxygen Sensor
    Oxygen Sensor Heater

    Hopefully someone here has some insight on this problem before I start spending cash at the mechanic.
    Some more context, I have driven both freeway and city miles to try to clear the cycle at suggested drive cycle speeds.
     

    Attached Files:

  2. Mr. F

    Mr. F Member

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    Location:
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    Vehicle:
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    Model:
    IV
    Each monitor requires its own driving pattern along with its own set of preconditions, and it is quite possible that the specific conditions required for those monitors to complete were not encountered during those 200 miles. The attachment should help.
     

    Attached Files:

    Coolguy6969 likes this.
  3. Coolguy6969

    Coolguy6969 New Member

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    Location:
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    Vehicle:
    2010 Prius
    Model:
    Two
    Thanks! I will take a look!
     
  4. Mendel Leisk

    Mendel Leisk Patron saint of newly poured sidewalks

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    For next time, google "memory saver car battery". Typically they're a cable, with indicator light(s) to confirm good connection, with a cig lighter style plug at one end, and the other end is an OBD plug, but with just the pins for 12 volt supply. I use one of these with my jump pack, which has the cig lighter style socket.

    Sometimes you can't avoid this though, say DIY'ing brake work: then it's safer to fully disconnect.

    One example:

    https://cloreautomotive.com/product/memory-saver-cord/

    You'll see other examples of the cable that come with a simple 9 volt battery, negating the need for any other power source. Not sure how reliable they are, probably ok though.
     
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