1. Attachments are working again! Check out this thread for more details and to report any other bugs.

slowing down on a rampy road

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Tariq87, Mar 1, 2020.

  1. Tariq87

    Tariq87 Member

    Joined:
    Aug 31, 2016
    87
    28
    0
    Location:
    jordan
    Vehicle:
    2010 Prius
    Model:
    III
    hi dears
    i need help on this ...

    When I left of the accelerator on a flat road even on a rampy road, I feel like the transmission remains engaged

    And the car slows down quite fast .. the car was not like this before one month

    note : the battery is brand new "almost one year old"

    is it a bad speeding sensor or it`s something else ?
     
  2. Tariq87

    Tariq87 Member

    Joined:
    Aug 31, 2016
    87
    28
    0
    Location:
    jordan
    Vehicle:
    2010 Prius
    Model:
    III
    it`s feels like im driving on B not on D
     
  3. Pluggo

    Pluggo Senior Member

    Joined:
    May 23, 2016
    608
    532
    0
    Location:
    Folsom, Pennsylvania
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Advanced
    I have no final answer, but let's try to narrow the focus. My first question for you is this: What do you feel when you are driving along and you take your foot off the gas pedal and actually shift into B? If there is no difference, then maybe your car is actually stuck in B all the time when it should be in D. Second question: does the car still accelerate normally? If not, could the brakes be dragging or a wheel bearing failing?
     
    Mendel Leisk and Raytheeagle like this.
  4. sam spade 2

    sam spade 2 Senior Member

    Joined:
    Mar 31, 2018
    7,035
    2,782
    0
    Location:
    USA
    Vehicle:
    2017 Prius c
    Model:
    Four
    What is a "rampy" road ?
    The transmission is always engaged. It doesn't work like a conventional setup.

    First thing I would do is have the brakes checked to be sure they aren't dragging.
    Soon or immediately. Dragging brakes can overheat and catch fire.

    The regenerative braking "engages" immediately upon releasing the throttle but that action shouldn't be "quite fast".
     
  5. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,673
    38,211
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    This is the 12 volt or hybrid battery? Mostly just to clarify, don't really think it's a factor.
     
  6. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

    Joined:
    May 12, 2018
    6,802
    6,453
    1
    Location:
    Pennsylvania
    Vehicle:
    2018 Prius c
    Model:
    Two
    How's the fuel consumption?
     
  7. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,699
    48,946
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    What happened if you throw her in neutral?
     
  8. Tariq87

    Tariq87 Member

    Joined:
    Aug 31, 2016
    87
    28
    0
    Location:
    jordan
    Vehicle:
    2010 Prius
    Model:
    III
    When i left of my foot the car slowing down quit fast.. it's never shifts to B but its feels like driving on B

    Posted via the PriusChat mobile app.
     
  9. Tariq87

    Tariq87 Member

    Joined:
    Aug 31, 2016
    87
    28
    0
    Location:
    jordan
    Vehicle:
    2010 Prius
    Model:
    III
    Rampy road it's like going downhill...so if the breaks is too old this will not effect the speed if i accelerate or not as i know maybe im wrong

    Posted via the PriusChat mobile app.
     
  10. Tariq87

    Tariq87 Member

    Joined:
    Aug 31, 2016
    87
    28
    0
    Location:
    jordan
    Vehicle:
    2010 Prius
    Model:
    III
    It's around 320 km in 20 liters

    Posted via the PriusChat mobile app.
     
  11. Tariq87

    Tariq87 Member

    Joined:
    Aug 31, 2016
    87
    28
    0
    Location:
    jordan
    Vehicle:
    2010 Prius
    Model:
    III
    Life is back..the car won't slowing down sure because the transmission is not engaged...will it be a bad speeding sensor ?

    Posted via the PriusChat mobile app.
     
  12. Tariq87

    Tariq87 Member

    Joined:
    Aug 31, 2016
    87
    28
    0
    Location:
    jordan
    Vehicle:
    2010 Prius
    Model:
    III
    Both of them around year and 3 months old "Hybrid and 12 volt"

    Posted via the PriusChat mobile app.
     
    Mendel Leisk likes this.
  13. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,673
    38,211
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    For info, that's about 6.25 liter/100km, or 37.6 mpg US.

    upload_2020-3-1_14-11-51.png

    Seems like what you'd get, driving with too much braking, for whatever reason.

    So this just started happening about a month ago? Did anything happen at that time? One guess: was maintenance done on the brakes, and since then they maybe are dragging??
     
    Raytheeagle likes this.
  14. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

    Joined:
    May 12, 2018
    6,802
    6,453
    1
    Location:
    Pennsylvania
    Vehicle:
    2018 Prius c
    Model:
    Two
    yeah that's too much fuel burnt, something isn't right.
     
  15. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,699
    48,946
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    if it goes away in neutral, it can't be brakes or bearings or tires. speed sensor would the the traction lite et al.
     
  16. Tariq87

    Tariq87 Member

    Joined:
    Aug 31, 2016
    87
    28
    0
    Location:
    jordan
    Vehicle:
    2010 Prius
    Model:
    III
    Dears im thinking about do a full maintenance which is

    1 change breaks
    2 change spark plugs
    3 change engine air filter
    4 clear egr and egr coolent
    5 clean throttle body
    6 clean MAF sensor
    7 check and clean speed sensors

    Posted via the PriusChat mobile app.
     
  17. Grit

    Grit Senior Member

    Joined:
    Aug 22, 2017
    6,112
    4,040
    1
    Location:
    Wilkes Land
    Vehicle:
    2012 Prius
    Model:
    Four
    Full maintenance list w/o an oil change :eek:
     
    Tariq87 likes this.
  18. Tariq87

    Tariq87 Member

    Joined:
    Aug 31, 2016
    87
    28
    0
    Location:
    jordan
    Vehicle:
    2010 Prius
    Model:
    III
    Dears..after full maintenance the pervious semptoms gone away. .the car now runs smoothly with no issues..

    Posted via the PriusChat mobile app.
     
  19. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,699
    48,946
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    darling, how do you check and clean the speed sensors?
     
    Raytheeagle likes this.
  20. Raytheeagle

    Raytheeagle Senior Member

    Joined:
    Jul 1, 2016
    11,251
    15,476
    0
    Location:
    Bay Area, California
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Plus
    This thread has become very sappy :love:.
     
    Mendel Leisk likes this.