2007 (2nd Gen) Engine lights, limp mode, and battery cooling fan

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by CerebralUnit, Mar 18, 2016.

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  1. CerebralUnit

    CerebralUnit New Member

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    My 2007 (2nd Gen) Prius' battery cooling fan is always on. The gas engine never shuts off. The array of warning lights include the red triangle, check engine, VSC and ( ! ) lights in addition to the car with the exclamation on the MFD.

    I tried resetting the error codes by disconnecting the 12v battery for a minute. When the error codes were gone, I started the car, drove for 10 miles, and it drove smoothly, seemed to charge the battery just fine, showed good gas mileage, and the gas engine turned on at normal times. After I returned home and turned the car on a second time, the warning lights came back on.

    I've gone to both O'Reilly and Autozone, both of which were not able to product error codes (They don't have TechStream). The car started going into Limp Mode 2 weeks ago intermittently (usually only after 5-10 minutes of idling in a drive-thru or parking lot), and now it goes into limp mode every few miles while driving.

    All of this started because I drove off of a curb with one tire (it was a gradual grade shift on a street curve that went from asphalt to asphalt curb). As soon as that happened, the triangle came on and the problems started the next time I started the car. What is wrong with this Prius?
     
    #1 CerebralUnit, Mar 18, 2016
    Pamella Temu likes this.
  2. JC91006

    JC91006 Senior Member

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    If there are warning lights on, there are DTC codes stored. Get them read and you'll know the problem
     
    #2 JC91006, Mar 18, 2016
  3. CerebralUnit

    CerebralUnit New Member

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    I'd like to do that, but the only place in my town that can read them is the Toyota dealership, and they want to gouge me for 200 dollars just to read the codes. I'm trying to save money to get this fixed, and that will put me back a lot.
     
    #3 CerebralUnit, Mar 18, 2016
  4. JC91006

    JC91006 Senior Member

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    Reading the symptoms you have, I would guess you have a failing hybrid battery.
     
    #4 JC91006, Mar 18, 2016
  5. exstudent

    exstudent Senior Member

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    Dash lit up like a Xmas tree, hearing battery fan in back, engine always running, & NO power/limp mode, are the classic signs & symptoms of a failed HV Battery.

    You could shop around independent Toyota mechanics to see how much they charge to get the codes read. If they don't have the proper equipment to read the codes, you shouldn't have to pay for services not rendered.

    OR, since all signs point to failed HV Battery, just get a new HV Battery.
     
    #5 exstudent, Mar 18, 2016
    Last edited: Mar 18, 2016
  6. usnavystgc

    usnavystgc Die Hard DIYer and Ebike enthusiast.

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    Yep. Failed battery. Classic symptoms.
     
    #6 usnavystgc, Mar 18, 2016
  7. usnavystgc

    usnavystgc Die Hard DIYer and Ebike enthusiast.

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    Ummm, let me guess P0A80!!!!
     
    #7 usnavystgc, Mar 18, 2016
  8. jadziasman

    jadziasman Prius owner emeritus

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    Isn't an OBD2 code scanner able to read a P0A80? My cheap, simple code scanner read the P0A93 code when the HV
    inverter electric pump failed in my Gen 2 so it stands to reason that my code scanner should be able to read the P0A80
    if and when it the HV battery dies while I still own it.
     
    #8 jadziasman, Mar 18, 2016
  9. ericbecky

    ericbecky Hybrid Battery Hero

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    If you are unable to spend $200 then you'll need to invest some time.
    Do you have an Android phone?
    If so buy a Bluetooth OBDII dongle, and the Torque app.
    Then use it to scan your car.

    Feel free to call me if you want to talk through any ideas.
     
    #9 ericbecky, Mar 19, 2016
  10. S Keith

    S Keith Senior Member

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    It does stand to reason; however, auto-parts store and the generic code readers (stand-alone devices) don't seem to reliably do it.

    I have 4 non-dealer options for reliable code reading in my sig.

    Steve
     
    #10 S Keith, Mar 19, 2016
  11. Rvagassippa

    Rvagassippa New Member

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    Hello I have 2006 batt fan comes on immediately car runs in limp mode and codes 1116 1121 stay on
     
    #11 Rvagassippa, May 28, 2019
  12. Pamella Temu

    Pamella Temu New Member

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    Hello guys ..the place where i live Tanzania thereis no one with this sofware. Priuses are not common here. Where can I downlod the TechStream software? Any link?
     
    #12 Pamella Temu, May 28, 2019
  13. ericbecky

    ericbecky Hybrid Battery Hero

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    #13 ericbecky, May 28, 2019
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