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Check engine just lit-up

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by kensiko, Mar 28, 2015.

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  1. kensiko

    kensiko Member

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    My Prius just reached 200000 km this week. I bought it at 180000 km 2 years ago, I don't drive it that much simply because I work from home.

    Today, a sunny day, 0 degrees, the check engine just lit-up. I opened the hood and checked fluid levels, all OK. I started it and listened to the engine, running as usual. However, when the motor stopped (hybrid ON), I can hear a high frequency noise. I don't remember hearing this noise, but I don't think I ever opened the hood with the engine Off but powered On.

    How can I get the check engine code ? I assume I need a connector, right ?
     
    #1 kensiko, Mar 28, 2015
  2. kensiko

    kensiko Member

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    Sorry for the wrong section.
     
    #2 kensiko, Mar 28, 2015
  3. bisco

    bisco cookie crumbler

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    did you check the gas cap tightness?
     
    #3 bisco, Mar 28, 2015
  4. kensiko

    kensiko Member

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    Just checked it, was tight
     
    #4 kensiko, Mar 28, 2015
  5. bisco

    bisco cookie crumbler

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    hmmm... might want to check the 12 volt. auto parts stores will sometimes read codes for you.
     
    #5 bisco, Mar 28, 2015
  6. kensiko

    kensiko Member

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    OK I'll check the voltage
     
    #6 kensiko, Mar 28, 2015
  7. kensiko

    kensiko Member

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    My father got a tool to get the code, we'll check that tomorrow. Where do you plug it ?
     
    #7 kensiko, Mar 28, 2015
  8. bisco

    bisco cookie crumbler

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    obd port. on board diagnostics, i think under the dash.
     
    #8 bisco, Mar 28, 2015
  9. Mendel Leisk

    Mendel Leisk Senior Member

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    OBD is pretty much directly below the steering wheel column. It's not that obvious, look with a light.
     
    #9 Mendel Leisk, Mar 28, 2015
  10. Mike500

    Mike500 Senior Member

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    Not all OBD II tools are compatible with the Prius.

    ScanGauge II is known to work.

    A mini-VCI cable with Techstream software is what basically Toyota uses.
     
    #10 Mike500, Mar 28, 2015
  11. xliderider

    xliderider Senior Member

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    FYI, it's normal to have a high pitched whine when the Prius is in Ready mode, it's the inverter.
     
    #11 xliderider, Mar 29, 2015
  12. kensiko

    kensiko Member

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    K thanks. My mpg is pretty low, there's a good chance it's the 12v battery, we'll see this afternoon
     
    #12 kensiko, Mar 29, 2015
  13. kensiko

    kensiko Member

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    Seems to be a oxygen sensor issue.

    12v battery is 11.8v no accessory. 11.7 with accessories, drops to 11.3 when turning ON
     
    #13 kensiko, Mar 29, 2015
  14. bisco

    bisco cookie crumbler

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    guess what?
     
    #14 bisco, Mar 29, 2015
  15. kensiko

    kensiko Member

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    Ok some news. We cleared the code, then hopped on the car and started it. It didn't start, lights were on in the dash.

    Checked again the 12V battery, was 9 Volts! After a few tries, I was able to start the car.

    Need a new battery, and fast.
     
    #15 kensiko, Mar 29, 2015
  16. kensiko

    kensiko Member

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    Battery replaced with the optima one. Took 15 minutes. Code disappeared. It's running well now, mpg went up.
     
    #16 kensiko, Apr 8, 2015
    Robert Holt likes this.
  17. bisco

    bisco cookie crumbler

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    (y)
     
    #17 bisco, Apr 8, 2015
  18. bisco

    bisco cookie crumbler

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    hate to be a pain, but you should check the voltage.:cool:
     
    #18 bisco, Apr 8, 2015
  19. kensiko

    kensiko Member

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    12.6 V
     
    #19 kensiko, Apr 8, 2015
  20. bisco

    bisco cookie crumbler

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    dead cold?
     
    #20 bisco, Apr 8, 2015
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