Rumble/growl from front

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Aranthon, Jan 18, 2016.

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  1. Aranthon

    Aranthon Junior Member

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    Cherry Hill, NJ
    Vehicle:
    2006 Prius
    Model:
    N/A
    Good evening all:

    A few days ago, I was cruising along at highways speeds, and I started hearing (and feeling) a growling noise from approximately the front left side of the car. It sounded like I was going over rumble strips and only lasted about 7-10 seconds. I thought maybe I was hitting a patch of lane marker rumble strips, except that it did the same thing again tonight. Unlike last time, I don't think it faded away entirely for the rest of that drive (about 7--10 miles), but I didn't hear it again when I drove home after my errand.

    The noise wasn't really speed dependent, and it didn't change whether I was driving straight or turning in either direction. My instinct is that it may be something with the motor, but that could be paranoia, since this is my first hybrid and I've only had the car for a few months.

    I have a 2006 Prius with about 156k miles.

    Any thoughts would be welcome.

    Thanks,

    Greg
     
  2. andrewclaus

    andrewclaus Active Member

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    Location:
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    Vehicle:
    2007 Prius
    Start with easy stuff: Look for broken and loose plastic splash shields--there are several large pieces under the front bumper and fenders. Rotate tires. When the front wheels are off, check brake calibers, rotors, axles, wheel bearings, ball joints and bushings. Look for leaks and stains and loose/torn things.

    How long have you had the car? Has it ever been in an accident?
     
  3. Lucifer

    Lucifer Senior Member

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    Nh
    Vehicle:
    2017 Prius Prime
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    Plug-in Advanced
    My front wheel bearings went at 45,000, the steering wrack at 60,000, yours at the moment needs bearings, check the wrack.
     
  4. Aranthon

    Aranthon Junior Member

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    2006 Prius
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    I've had the car a bit more than three months. I believe there was a minor accident in the history; parking lot fender bender sort of thing. I'll check the bearings, etc.

    Thanks!





     
  5. Bob mills

    Bob mills New Member

    Joined:
    Nov 6, 2018
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    Location:
    oberon nsw 2787 australia
    Vehicle:
    2005 Prius
    Model:
    i-Tech
    I have a 2005 prius with 360k kms and I had been following a slow car near Oberon NSW Australia and approached a steep hill with a passing lane. A hyundai SUV following me indicated he wanted to pass us both presumably as I was a little car and deserved to be passed. I gunned the prius and was doing 110kph at the top of the hill with him some 10 car lengths behind. I then backed off as I was in a 100 zone and he passed me doing some 130 kph and I never saw him again. The prius then commenced growling on overrun. I was travelling to Mt Victoria to pick up a friend of my wife and on the return trip (50KM) the trouble light flared and the prius tripped the cruise control. It was unfortunate as my wife's friend was regaling me with a tale of travelling with the husband of another friend and the car gave the trouble light. They ignored it and shortly the engine blew up. I propped and sat there thinking what would be prudent and decided to finish the trip slowly. I safely reached home (Oberon) and attached the Intelligent Tester which said POA2B which means "Drive Motor A temperature sensor range" which means MG2 temperature beyond limits, or the drive motor is over temperature. We then did a trip to Bathurst with the IT monitoring MG2 temperature and the temperature rose to 160 deg C after about 40KM at 80 kph and the trouble light flared. My diagnosis is that we have a shorted turn (standard electric motor fault) in the main motor (electric) which becomes intolerable at high frequency or high speed. On stopping the temperature dropped to 80 deg C in about 5 minutes. Toyota tells me that there is no value in repairing the electric motor, the whole transmission has to be changed. We have since travelled to Sydney (160KM) and the last 40KM was at 65 kph to keep the temperature below 150 deg C.
     
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  6. Bob mills

    Bob mills New Member

    Joined:
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    Location:
    oberon nsw 2787 australia
    Vehicle:
    2005 Prius
    Model:
    i-Tech
    Bob mills again and we ran the vehicle for a further four months, 40km trips only, then it flashed an earth fault. We reset the DTC (POAA6, hybrid battery isolation) and headed for home at 60k. At 10ks it alarmed again and we ignored it. After another 2k it ground noisily to a halt, fortunately allowing us enough time to get off the road. We had the following DTCs;
    POA78; drive motor A inverter performance. 287 overcurrent.
    POA2B; Drive Motor A temperature sensor circuit.
    POA2C; Drive motor A ground short in motor A temperature circuit.
    POAA6; Hybrid battery isoolation 526 Not listed..
    We tilt trayed it home and it made a pronounced clicking noise in neutral as it dragged onto the tilt tray.
    Next morning we reset the DTCs and tried to select drive.. The trouble light came up and we got POA78. I have ordered a second hand transmission, 80k, at $A 880 from Melbourne. Manhandling it into my shed in neutral has flattened the main battery which is a puzzle.
     
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