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Wokeup to Abs brake and stability system light on

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Matty803, Jul 20, 2020.

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  1. Matty803

    Matty803 New Member

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    Wokeup today got in my car and all these lights were on and car drove very rough... What is going on 20200720_171059_HDR.jpeg

    Posted via the PriusChat mobile app.

    Was driving fine just last night not sure what happened the past 8 hours it was parked...

    Posted via the PriusChat mobile app.
     
    #1 Matty803, Jul 20, 2020
    Last edited by a moderator: Jul 20, 2020
  2. Matty803

    Matty803 New Member

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    So car drives okay takes more pressure and time to stop but i noticed the regenerative braking is not working. Taking it to a shop to get it looked at tomorrow

    Posted via the PriusChat mobile app.
     
    #2 Matty803, Jul 20, 2020
  3. SB6

    SB6 Member

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    Any codes?
     
    #3 SB6, Jul 20, 2020
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  4. Matty803

    Matty803 New Member

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    Should i take it to an autozone to check if theres codes? My screen is cracked soni cant do any diagnostics myself.

    Posted via the PriusChat mobile app.
     
    #4 Matty803, Jul 20, 2020
  5. bisco

    bisco cookie crumbler

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    start with a check of the 12v health, then have the codes read. they can do it at the same time.

    how many miles on her?
     
    #5 bisco, Jul 20, 2020
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  6. SB6

    SB6 Member

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    Check if any of the speeds sensors happen to have come out. I don't know if that can cause a loss of regenerative braking, but I believe it can cause those lights. Other thing I can think of is the brake booster, in which case, look into Customer Support Program ZJB
     
    #6 SB6, Jul 20, 2020
    Last edited: Jul 20, 2020
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  7. ChapmanF

    ChapmanF Senior Member

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    There are about two hundred reasons for those lights to come on, 2 / 200ths of which were mentioned by SB6 above.

    That's why the recommendation to read the trouble codes will often save you a lot of time compared to guessing.

    The codes can be read at the same time as a battery check, if the shop is careful not to do anything in checking the battery that would clear the codes.

    Otherwise, you're left with an unsolved mystery for as long as it takes for the codes to come back, could be minutes, could be months.
     
    #7 ChapmanF, Jul 20, 2020
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  8. Matty803

    Matty803 New Member

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    So my back left abs sensor was broken and ziptied back together thats the reason for the abs light. Break pads were a little low rotors werent great either. They said they couldnt do anything about the abs sensor all they can do is fix the breaks and do an alignment. Im not sure uf fixing the brakes would acrually solve the problem or not though.

    Posted via the PriusChat mobile app.
     
    #8 Matty803, Jul 21, 2020
  9. AzusaPrius

    AzusaPrius Senior Member

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    Im willing to bet there is a C1259 and C1310
     
    #9 AzusaPrius, Jul 21, 2020
  10. SB6

    SB6 Member

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    I don't think brake pad and rotor wear can cause all those lights and a loss of regenerative braking. Your issue is the abs sensor.

    What's wrong with it? Is it still intact, or has it ripped off? If it's intact, it might just be dirty?

    Again, without the codes, all we can do is throw out guesses.
     
    #10 SB6, Jul 21, 2020
  11. Grit

    Grit Senior Member

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    How much is your wager?
     
    #11 Grit, Jul 21, 2020
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  12. Matty803

    Matty803 New Member

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    The shop said the only thing that came bacl was the back left abs sensor he didnt tell me the code

    Posted via the PriusChat mobile app.
     
    #12 Matty803, Jul 21, 2020
  13. Matty803

    Matty803 New Member

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    Regenerative braking working again.. Somehow

    Posted via the PriusChat mobile app.

    Lights are still on and tough to brake pedal is very spongy. Been driving in b gear to help stopping

    Posted via the PriusChat mobile app.

    The mechanic said the thing that popped up was the left rear abs sensor

    Posted via the PriusChat mobile app.
     
    #13 Matty803, Jul 21, 2020
    Last edited by a moderator: Jul 21, 2020
  14. Grit

    Grit Senior Member

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    Some feller said he was going to do that for regular driving, and he was soo poo pooed on with replies.
     
    #14 Grit, Jul 21, 2020
  15. AzusaPrius

    AzusaPrius Senior Member

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    Usually will be the sensors and that is why I said those codes although they are not specific they point to them and if the sensors go bad then there goes your regen of your hybrid which will lead to "check hybrid system".

    Be cool if you can go back and get the codes just to see.
    Unless he reset them and fixed the issue with the sensor.
     
    #15 AzusaPrius, Jul 21, 2020
  16. Matty803

    Matty803 New Member

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    Im taking it to another shop they said they couldnt fix the sensor for some reason. The sensor was cracked in half and someone before me had ziptied it to hold it in place

    Posted via the PriusChat mobile app.
     
    #16 Matty803, Jul 21, 2020
  17. Matty803

    Matty803 New Member

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    Definitely helping alot with stopping the car

    Posted via the PriusChat mobile app.
     
    #17 Matty803, Jul 21, 2020
  18. ChapmanF

    ChapmanF Senior Member

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    Oddly enough, you managed to pick two codes that will never, under any circumstances, mean the wheel speed sensors or any braking component.

    C1259 and C1310 are both codes that are set in the brake ECU to acknowledge a message from the power-management ECU that there is a problem over there (related to the hybrid electronics). One of them means "yes, I heard that the power-management ECU is reporting a problem" and the other means "yes, I understand that stopping the car is all on me because power-management won't be stepping in with regen."

    The wheel speed sensors are directly wired to the brake ECU. Any time there is a problem with those sensors, the brake ECU will set its own codes that mean that.
     
    #18 ChapmanF, Jul 21, 2020
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  19. Matty803

    Matty803 New Member

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    So i double checked at o reileys no codes only rear speed sensor high input

    Posted via the PriusChat mobile app.
     
    #19 Matty803, Jul 21, 2020
  20. SB6

    SB6 Member

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    No codes and the warning lights are still on? You may need to use something that can access the ABS codes
     
    #20 SB6, Jul 21, 2020
    Last edited: Jul 21, 2020
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