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P0420, P0441, P2501, P0803 - 2006 Prius 230K miles

Discussion in 'Gen 2 Prius Technical Discussion' started by Bryan Holloway, Jul 27, 2016.

  1. Bryan Holloway

    Bryan Holloway Junior Member

    Joined:
    Feb 10, 2016
    43
    4
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    Location:
    Fullerton, Ca
    Vehicle:
    2006 Prius
    Model:
    II
    I have a P0420 code that sets off and not able to pass smog I started looking into it. After watching my downstream O2 fluctuate from .1-.4 before cleaning, now after cleaning its at .1-.8. The code still comes back right away.

    Also I noticed I am able to look at the "Readiness codes" on the programmer. It gave me one false code, a P0441 (Evaporative Emission Control (EVAP) System Incorrect Purge Flow), P2501, and a P0803 (1-4 Upshift Skip Shift Solenoid Control Circuit Malfunction). Is it possible the EVAP might have something to do with this P0420 code?
     
    #1 Bryan Holloway, Jul 27, 2016
  2. Bryan Holloway

    Bryan Holloway Junior Member

    Joined:
    Feb 10, 2016
    43
    4
    1
    Location:
    Fullerton, Ca
    Vehicle:
    2006 Prius
    Model:
    II
    Anyone have any experience with these codes?
     
    #2 Bryan Holloway, Jul 28, 2016
  3. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    are you using tech stream and the service manual?
     
    #3 bisco, Jul 29, 2016
  4. Bryan Holloway

    Bryan Holloway Junior Member

    Joined:
    Feb 10, 2016
    43
    4
    1
    Location:
    Fullerton, Ca
    Vehicle:
    2006 Prius
    Model:
    II
    No im using the Innova 31603 CarScan + ABS/SRS Scan Tool. No service manual =(
     
    #4 Bryan Holloway, Jul 29, 2016
  5. niphonk98

    niphonk98 Junior Member

    Joined:
    Oct 23, 2010
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    Location:
    San Francisco
    Vehicle:
    2008 Prius
    Model:
    Five
    I got the P0420 the same. I look the code have 3 problems.
    #1.O2 sensor
    #2.Mass airflow sensor
    #3.Catalytic convertor
    I fix the temporary problem by use the scanguage to scan and clear the code.
     
    #5 niphonk98, Jul 30, 2016
    bisco likes this.
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