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Ran out of gas - P0420 code

Discussion in 'Gen 2 Prius Main Forum' started by mountain_matt, Nov 19, 2019.

  1. mountain_matt

    mountain_matt New Member

    Joined:
    Nov 19, 2019
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    Location:
    California
    Vehicle:
    2007 Prius
    Model:
    ----USA----
    Ran out of gas, check engine light is on with P0420 code.

    Could running out of gas cause CAT failure, or is more likely to be the 02 sensors?

    Photo of home diagnostic posted.

    Thanks for your help!

    -Matt
     

    Attached Files:

    #1 mountain_matt, Nov 19, 2019
  2. SFO

    SFO Senior Member

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    How many miles do you have on the vehicle?
     
    #2 SFO, Nov 19, 2019
  3. bisco

    bisco cookie crumbler

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    welcome! did you get her restarted?
     
    #3 bisco, Nov 19, 2019
  4. PriusCamper

    PriusCamper Senior Member

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    Sometimes it takes as much as three gallons of gas to get things working normally again... Also do the codes come back right away after you clear 'em? Or does it take a while?
     
    #4 PriusCamper, Nov 19, 2019
  5. MilkyWay

    MilkyWay Active Member

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    That will happen to every Prius that runs out of gas. Happened to me. Add gas, clear code, it will not come back.
     
    #5 MilkyWay, Nov 21, 2019
    SFO likes this.
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