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2008 Brake warning lights (I KNOW)

Discussion in 'Gen 2 Prius Main Forum' started by bl817, Mar 11, 2019.

  1. bl817

    bl817 Junior Member

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    My 2008 has 162k miles. about a month ago I changed the plugs to OEM type. car drove fine. other night I parked the car. next morning started up to go to work and the red "BRAKE" light, yellow ( ! ) (not tire sensor one) and yellow ABS lights all stayed on. I use the parking brake every day as my driveway is sloped, "BRAKE" light always goes off when its released. I did the paper clip trick and got ( ! ) 69,41. on the ABS got 42. I cannot for the life of me find the definitions for these codes or some sort of cross reference list. the 12v battery was changed to an Optima yellow top not to long ago, would think its fine but didn't check voltage. help with codes would be greatly appreciated.
     
    #1 bl817, Mar 11, 2019
  2. bisco

    bisco cookie crumbler

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    You’d probably have to look in the service manual
     
    #2 bisco, Mar 11, 2019
  3. N3K X8

    N3K X8 New Member

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    Go to your nearest autozone, get it scanned. Mine was the same, turned out to be left front wheel sensor

    Posted via the PriusChat mobile app.
     
    #3 N3K X8, Mar 11, 2019
  4. bl817

    bl817 Junior Member

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    I scanned it with my ELM OBD2 adapter and my Torque (pro) app. no codes came up. I cleared the lights with the paper clip and pressing the brake 8X. if autozone can read ABS codes, ill try them out. thanks again.
     
    #4 bl817, Mar 11, 2019
  5. ChapmanF

    ChapmanF Senior Member

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    For the life of you, I'm sure you'd try harder, right? The trick is to make sure that the last place you look is the repair manual. That way you always get to say you found them in the last place you looked.

    For the (!), in a 2006 manual, 41 corresponds to C1241 and refers to inadequate electrical power arriving at the brake controls (this throws a lot of people off track, because the fortune cookie for this code has "battery positive voltage" in it and makes people think it's about the 12 volt battery, but it is more about the electrical wiring/connectors/relays/fuses on the path to the brake controls). 69 seems to correspond to C1391 and the pressure-holding ability of the accumulator.

    The repair manual is the next place to look anyway, because it has about eight workup pages saying how to pin down what the 41 is telling you about, For the 69, only a couple pages.

    I am not finding a 42 code anywhere in the chart for ABS codes, but you have a 2008, so maybe your manual would show one.

    The 41 ECB code has four different "inf codes" to tell you more about that situation, but those are hard to read without Techstream. (Techstream can also show you exactly what voltages were being measured everywhere at the instant that code was set, which can be very helpful.)
     
    #5 ChapmanF, Mar 11, 2019
  6. bl817

    bl817 Junior Member

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    Thanks Chapman for your semi helpful and somewhat backhanded post. if my life depended on it, I probably would have done more searching. I feel I did enough to get frustrated when the results were not answering my questions. "2008 abs warning lights" "2008 brake light warnings", "2008 Toyota prius abs brake light warnings" and about 20 others. I have a chiltons for this car and it has no info on codes other than general OBD2 codes. I called autozone and they do not scan for other than general OBD2 codes. FINALLY at last!!!!! your first sentence pointed me in the last direction I should look. the GD repair/service manual. WFFGDFSYFCS! I finally found what I was looking for. does it help? yes. here is the link I finally found thanks to your round about answer.

    http://www.gwzz.com/tmp/Prius-RepairManual-2005.pdf
     
    #6 bl817, Mar 12, 2019
  7. bl817

    bl817 Junior Member

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    Thanks Chapman for your semi helpful and somewhat backhanded post. if my life depended on it, I probably would have done more searching. I feel I did enough to get frustrated when the results were not answering my questions. "2008 abs warning lights" "2008 brake light warnings", "2008 Toyota prius abs brake light warnings" and about 20 others. I have a chiltons for this car and it has no info on codes other than general OBD2 codes. I called autozone and they do not scan for other than general OBD2 codes. FINALLY at last!!!!! your first sentence pointed me in the last direction I should look. the GD repair/service manual. WFFGDFSYFCS! I finally found what I was looking for. does it help? yes. here is the link I finally found thanks to your round about answer.

    http://www.gwzz.com/tmp/Prius-RepairManual-2005.pdf
     
    #7 bl817, Mar 12, 2019
  8. ChapmanF

    ChapmanF Senior Member

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    Glad you found it. I was maybe a little harsh; it's just weird how often people on PriusChat who have not looked in the repair manual for information that's obviously there will post about how exhaustively they've searched everywhere in the world except the manual and come up empty handed. I need to try harder to respond as if it's the first time you've written it, rather than the five hundredth time I've read it. :)
     
    #8 ChapmanF, Mar 13, 2019
    Elektroingenieur likes this.
  9. bisco

    bisco cookie crumbler

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    But look at how much more effective your post was than the dope in post #2
     
    #9 bisco, Mar 13, 2019
  10. bl817

    bl817 Junior Member

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    not a problem. thank you BOTH for your guidance, now to diagnose!
     
    #10 bl817, Mar 13, 2019
  11. bl817

    bl817 Junior Member

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    C1256, C1391 codes from a general abs scanner. pointing towards bad brake actuator.
     
    #11 bl817, Mar 27, 2019
  12. Cimorene

    Cimorene Junior Member

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    Hey did you ever figure out the issue with the (!) alert after replacing the battery? Mine came on immediately after replacing it and now Im feeling a bit lost. The paperclip trick doesnt seem to be working for me. The lights flash and then the brake error comes back on
     
    #12 Cimorene, Dec 8, 2019
  13. bl817

    bl817 Junior Member

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    found a fix, sold the car, other than that, no. cant wait till our 15' starts acting up tho.
     
    #13 bl817, Dec 8, 2019
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  14. Cimorene

    Cimorene Junior Member

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    What was the fix?
     
    #14 Cimorene, Dec 9, 2019
  15. bl817

    bl817 Junior Member

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    selling the car and letting someone else deal with it.
     
    #15 bl817, Dec 17, 2019
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