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2007 Prius Not accelerating quickly all of a sudden

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Lane Wyatt, Jan 29, 2020.

  1. Lane Wyatt

    Lane Wyatt New Member

    Joined:
    Jan 29, 2020
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    Location:
    Portland, Oregon
    Vehicle:
    2007 Prius
    Model:
    Touring
    ISSUE: after driving home today (2hr + on windy roads) it started in on some warnings and shortly thereafter began to not respond quickly to giving it gas. very, very slow acceleration.

    ABOUT VEHICLE: 240k miles. New to me, but fixed up by a prius guy. only thing new: LED light newly installed by mechanic.

    CODE: PO420, which my mechanic has told me isn't an issue.

    Does the Cat need help? HV Issue? Transmission?
     

    Attached Files:

    #1 Lane Wyatt, Jan 29, 2020
  2. sam spade 2

    sam spade 2 Senior Member

    Joined:
    Mar 31, 2018
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    Location:
    USA
    Vehicle:
    2017 Prius c
    Model:
    Four
    Well......the first thing you should do is check the oil.
    And then check the 12 V battery.

    Then I think maybe you might need a new mechanic, one who has the proper equipment to diagnose a Toyota hybrid.

    If the hybrid battery has never been changed, that would be my first guess.
     
    #2 sam spade 2, Jan 30, 2020
  3. eternalphoenix64

    eternalphoenix64 Junior Member

    Joined:
    Jan 14, 2020
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    Location:
    Battle Ground, WA
    Vehicle:
    2009 Prius
    Model:
    Five
    With those lights, if the only thing you're getting for codes is P0420, you need a more in depth scan that can verify if there are codes from the other systems. And if that comes up negative, replace 12V battery (you can also check that first, there's plenty of info on how via Google or forum search).
     
    #3 eternalphoenix64, Jan 30, 2020
  4. George W

    George W Active Member

    Joined:
    Mar 12, 2018
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    Location:
    San Antonio
    Vehicle:
    2008 Prius
    Model:
    Touring
    The Maint Rqrd means you're past scheduled oil change (5000 miles). If you pay a mechanic for an oil change they are suppose to reset that. Please check that right away, since you could be Low and Past Due.
     
    #4 George W, Jan 30, 2020
  5. SFO

    SFO Senior Member

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    Location:
    Northern California
    Vehicle:
    2007 Prius
    Model:
    N/A
    Welcome to PriusChat!!

    Which device was used to retrieve that P0420 code (aka DTC), and was that from a recent scan?

    Given the lights on the dash, you may be missing some of the other codes (DTCs).

    How do you like the new LED light, and is the a headlight?
     
    #5 SFO, Feb 2, 2020
    Raytheeagle likes this.
  6. yi3o8

    yi3o8 Junior Member

    Joined:
    Mar 4, 2019
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    Location:
    usa
    Vehicle:
    2006 Prius
    Model:
    Four
    Check your oil. Get the codes scanned or even get your own scan tool. Is the red car icon on your info screen at the top?

    Posted via the PriusChat mobile app.
     
    #6 yi3o8, Feb 2, 2020
  7. edthefox5

    edthefox5 Senior Member

    Joined:
    Jul 25, 2007
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    Location:
    Clearwater, Florida
    Vehicle:
    2007 Prius
    Model:
    Two
    Hybrid battery has failed and car is in limp mode,

    This can be confirmed by a little car icon in the top left corner of the mfd
    Looks like a turtle accompanied by the red triangle of death warning light
    On the dash We call that the RTOD.

    If neither of those it’s not the battery, But the battery is

    Very very common, and a pain in the tookus to fix.

    There are various types of battery failure one is called a ground fault which can be reset temporarily but removing the negative lead from the 12 bolt battery thereby resetting the ecu. You are then able too drive ok for a while till it happens Again. But eventually the battery must be rebuilt.

    The other failure mode is a failed battery module or 2 that will not recover and battery must come out for rebuild.
     
    #7 edthefox5, Feb 3, 2020
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