I'm Getting The "Maintenance Required Soon" Notice

Discussion in 'Prius c Main Forum' started by Lukey51, Feb 15, 2021.

  1. Lukey51

    Lukey51 Active Member

    Joined:
    Jan 11, 2020
    198
    103
    0
    Location:
    TN
    Vehicle:
    2012 Prius c
    Model:
    Two
    My 2012 Prius C has been saying "Maintenance Required Soon" on the dash the last few days. I change my own oil and filter and did that last Sept. I also flushed the radiator and inverter coolant last Sept. But I never reset anything. Do I need to reset something when I do my own service?

    Lately when I back it out of the garage the front rotors seem to stick to the discs and it makes a noise when I move the car, and I don't think I set the emergency brake. I was wondering if the brakes are the reason why I'm getting that notice on the dash but probably not. Maybe clips that stick.

    Can anyone shed some light on this? TIA
     
  2. fuzzy1

    fuzzy1 Senior Member

    Joined:
    Feb 26, 2009
    16,007
    9,200
    90
    Location:
    Western Washington
    Vehicle:
    2012 Prius
    Model:
    Three
    Yes, you need to manually reset the service reminder, which is really just a hidden trip odometer. Check your Owner's Manual (available online if you don't have a copy, I didn't pull it up to find the 'c' reset method).

    It has no connection to the brakes.
     
    Lukey51 likes this.
  3. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    99,178
    44,933
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    no, the service reminder is just computer generated every 4500 miles or so.

    the brake rotors are rusting in the garage from condensation or putting away wet.

    very common on prius because the discs are applied so infrequently.

    get up to 30mph or so on a back road, throw it in neutral, and gently apply the brakes until the sound goes away.
    that takes the rust off, it is superficial.
     
    Lukey51 likes this.
  4. Lukey51

    Lukey51 Active Member

    Joined:
    Jan 11, 2020
    198
    103
    0
    Location:
    TN
    Vehicle:
    2012 Prius c
    Model:
    Two
    But it only makes a click noise when the car moves back out of the garage, and then there is no more noise.
    It seems like the rotor was stuck to the disc for some reason. Should I still try to clean the disc as you described?

    It's been a very rainy Winter here in East TN.
     
  5. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

    Joined:
    May 12, 2018
    4,813
    4,746
    1
    Location:
    Pennsylvania
    Vehicle:
    2018 Prius c
    Model:
    Two
    Pads stick to rotors and or calipers with disuse. They self-moderate properly with ordinary brake use over a few miles.

    The reminder you're seeing is strictly odometer driven, no actual sensors involved.
     
  6. fuzzy1

    fuzzy1 Senior Member

    Joined:
    Feb 26, 2009
    16,007
    9,200
    90
    Location:
    Western Washington
    Vehicle:
    2012 Prius
    Model:
    Three
    If the pad sticks to the disc, you should be able to see the pad outline on the disc immediately after.

    Yes, you can clean it the same way. But if that outline is the only rust that shows, then any cleaning effort may be unneeded. Some friction braking is applied every time you stop (regeneration disengages below about 7 mph), and this may be enough to erase that outline.
     
  7. Lukey51

    Lukey51 Active Member

    Joined:
    Jan 11, 2020
    198
    103
    0
    Location:
    TN
    Vehicle:
    2012 Prius c
    Model:
    Two
    Maybe if I just use the brakes more, I can remedy it myself.
    I tend to downshift a lot with the B drive mode.
    Perhaps regular braking will stop the noise I hear when I first move the car after it's sat in the garage over night or longer.
     
  8. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    99,178
    44,933
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    good idea, b-mode is really not for regular braking
     
    Lukey51 likes this.
  9. Lukey51

    Lukey51 Active Member

    Joined:
    Jan 11, 2020
    198
    103
    0
    Location:
    TN
    Vehicle:
    2012 Prius c
    Model:
    Two
    Took the car out today and the brakes made that noise upon moving the car again.
    I didn't use the B mode at all, and I braked several times while in neutral.
    The brakes seem to work better now.
     
  10. dubit

    dubit Senior Member

    Joined:
    Dec 3, 2016
    848
    534
    23
    Location:
    Indiana
    Vehicle:
    2016 Prius c
    Model:
    Two
    He's also losing out on reclaimed energy from braking.
     
    bisco and jerrymildred like this.
  11. jerrymildred

    jerrymildred Senior Member

    Joined:
    Oct 28, 2016
    11,084
    13,542
    0
    Location:
    Tampa, FL
    Vehicle:
    2017 Prius
    Model:
    Two
    You'll probably get better gas mileage now, too. B mode is for engine braking on big big hills to save wear on the brakes and give the energy a place to go besides the battery. In normal use, the battery is precisely where you want that braking energy to go.
     
    Lukey51 likes this.
  12. Mendel Leisk

    Mendel Leisk Underfoot

    Joined:
    Oct 17, 2010
    48,206
    34,430
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Reserve B mode for coming down Pikes Peak. Seriously.
     
    Lukey51 and jerrymildred like this.
  13. Lukey51

    Lukey51 Active Member

    Joined:
    Jan 11, 2020
    198
    103
    0
    Location:
    TN
    Vehicle:
    2012 Prius c
    Model:
    Two
    I braked in N mode several times yesterday and today my brakes didn't make that noise when I backed her out of the garage.
    It put a smile on my face. I'd say my mission was accomplished.
     
    jerrymildred likes this.
  14. jerrymildred

    jerrymildred Senior Member

    Joined:
    Oct 28, 2016
    11,084
    13,542
    0
    Location:
    Tampa, FL
    Vehicle:
    2017 Prius
    Model:
    Two
    Good job! Normal braking should eliminate that. But you'll still get it initially when you first get going, especially after rain. As mentioned before, the pads engage under normal braking when you get below about 7 mph, so it'll take a few stops to clear them off. If it bugs you too much, using neutral once or twice gets it done quicker. But it shouldn't be necessary. I never do it.
     
    Lukey51 likes this.
  15. Lukey51

    Lukey51 Active Member

    Joined:
    Jan 11, 2020
    198
    103
    0
    Location:
    TN
    Vehicle:
    2012 Prius c
    Model:
    Two
    It's interesting how you guys had an simple remedy for this situation.
    My Prius C continues to amaze me as one of the best made cars I've ever had.
    I was in the habit of swapping cars about once a year -- until I got this car.
    Now I'll probably run this car for 5-10 years.
     
    Pri3C and jerrymildred like this.
Loading...