Prius check hybrid system warning after going over bump on highway

Discussion in 'Gen 3 Prius Main Forum' started by Rishi999, Aug 28, 2019.

  1. Rishi999

    Rishi999 New Member

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    I was driving on the highway at around 130 km/h. Went over two areas where the road was bumpy/elevated. Heard when stuff at the trunk area made noise as it was probably lifted then dropped. About a minute after, the check hybrid system warning message came up and the car started decelerating on it's own and I pulled over and it came to a stop. Now, when I start the vehicle, the ready sign comes on, but the engine does not. If I try switching to drive or reverse, the screen changes to an error message saying to place in park. the car moves in the direction of the gear, but very sluggish and also bucks. If I start the car and do nothing, the HV battery shows full level but decreases rapidly to 1 bar in less than a minute then a constant beep is heard and screen goes into error. Also now the power steering light comes on. So far the engine hasn't turned on and cannot charge the HV battery. The only error code that comes up is P3000 (cant get any subcodes). No error codes for engine or anything else. Was wondering if something could have became loose or wire tear/disconnected when I hit the bump as the car was working flawlessly before. I've also checked the service plug which is correctly intact.
     
  2. Pluggo

    Pluggo Active Member

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    Try disconnecting the 12V battery for a few seconds, then reconnect it to automatically reset a few conditions. If you are lucky, it will not be necessary to expose the HV battery and begin looking for broken bus bars or other connectors.
     
  3. Rishi999

    Rishi999 New Member

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    Thanks for the reply, however I have tried this to no avail. Engine still does not come on and same issues arise
     
  4. bettergolf

    bettergolf Member

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    Based on your description of how this happened, I would unplug and reconnect every connector that is associated with the high voltage hybrid battery and hybrid system, both under the hood and at the hybrid battery location. It sounds like the hybrid battery is not plugged in somewhere and the car will not run even on the gas engine if the hybrid battery is dead or not connected.
     
  5. cnc97

    cnc97 Senior Member

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    I wonder if the bump is unrelated to the condition, just coincidental. I wonder if the inverter has failed. You start the car and it is ok until you shift into gear then it quits. I bet there are more codes, your tool just can’t read them.
     
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  6. Rishi999

    Rishi999 New Member

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    If I start the car and also wait about 1 minute or less without doing anything, it still goes into error. Can this be a symptom of failed inverter also?
     
  7. Rishi999

    Rishi999 New Member

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    I was told that it's possible that it can be a bad HV battery ECU. How likely is this?
     
  8. cnc97

    cnc97 Senior Member

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    It could be either one. The key is getting it to a hybrid specialist for a once over. That will be the key.
     
  9. Rishi999

    Rishi999 New Member

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    Tried the new hv battery ecu and same problem. I was told that there is power from the inverter but mg1 isn't starting.
    Are there any fuse or sensors that will prevent mg1 from turning? Also there are no codes being logged so is it possible that it can be a mechanical issue with mg1?
     
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