Possible loss of engine power/electric motor/battery okay

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by RandyMac, Apr 21, 2016.

  1. RandyMac

    RandyMac Junior Member

    Joined:
    Oct 24, 2009
    7
    1
    0
    Location:
    Charlotte
    Vehicle:
    2010 Prius
    Model:
    V
    Yesterday while driving my 2010 V, I noticed that when I let off the gas, it felt as if I had it in "brake" mode and it would slow down. I was in regular driving mode, not in brake, or power setting and the e
    emergency brake pedal had been released. I was not in "cruise" either. I noticed the instrument that indicates where the power-drive (?) is coming from looked to be only between the electric motor and the battery. The car has 72,000 miles and has been regularly serviced. I have had it since was new. How serious might this be? It is drivable but I parked it anyway. May have taken to dealer this morning on a flatbed. Any thoughts?
     
    #1 RandyMac, Apr 21, 2016
  2. jdcollins5

    jdcollins5 Senior Member

    Joined:
    Aug 30, 2009
    5,131
    1,328
    0
    Location:
    Wilmington, NC
    Vehicle:
    2010 Prius
    Model:
    III
    Normal operation is to regenerative brake when you let off the gas, with MG2 current flowing to the HV Battery. This simulates engine drag on ICE only cars. This is what you saw on the instrument panel.

    Since you have had it since new, if it is more braking than normal it could be a brake caliper sticking issue. The next time you drive it feel each of the wheels around the brake pads and see if one is hot.

    There should be no problem driving the car so you should be able to drive to dealership.
     
    #2 jdcollins5, Apr 21, 2016
  3. szgabor

    szgabor Active Member

    Joined:
    Jul 29, 2009
    993
    175
    0
    Location:
    Oceanside NY
    Vehicle:
    2012 Prius
    Model:
    Two
    The above is a good test.

    Also if you are in a safe area and going relatively slowly (under 42 but better less than that) just put the car in N and see if you have the drag. If you do then it IS coming from the break (of course do not use the break). This is totally safe shifting is "electronic".
     
    #3 szgabor, Apr 22, 2016
    Last edited: Apr 22, 2016
  4. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    102,949
    46,703
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    i think someone else just something similar.
     
    #4 bisco, Apr 22, 2016
(You must log in or sign up to post here.)
Loading...
Similar Threads - Possible loss engine
  1. Priipriii

    Oil in coolant tank? Blown headgasket possibly?

    Priipriii, Mar 12, 2023, in forum: Gen 3 Prius Care, Maintenance & Troubleshooting
    Replies:
    2
    Views:
    303
    Mendel Leisk
    Mar 12, 2023
  2. twhornback

    Worth cleaning EGR assembly AFTER coolant loss?

    twhornback, Dec 5, 2022, in forum: Gen 3 Prius Care, Maintenance & Troubleshooting
    Replies:
    6
    Views:
    709
    twhornback
    Dec 6, 2022
  3. zoeboi954

    What does B line mean on the reservoir? And is possible/bad to overfill with too much coolant?

    zoeboi954, Oct 21, 2022, in forum: Gen 3 Prius Care, Maintenance & Troubleshooting
    Replies:
    5
    Views:
    686
    ChapmanF
    Oct 21, 2022
  4. PriusPersonThing

    What Are Normal Voltage and Ohm Readings on a Prius 12v Battery?

    PriusPersonThing, Aug 31, 2022, in forum: Gen 3 Prius Care, Maintenance & Troubleshooting
    Replies:
    4
    Views:
    1,031
    bisco
    Sep 3, 2022
  5. mtl

    EGR clogging - is it possible to avoid it?

    mtl, May 29, 2022, in forum: Gen 3 Prius Care, Maintenance & Troubleshooting
    Replies:
    5
    Views:
    1,252
    CR94
    May 31, 2022