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

2006 Prius Codes/Triangle of death troubleshooting

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by HybridNicc, Jun 3, 2018.

  1. HybridNicc

    HybridNicc New Member

    Joined:
    Jun 3, 2018
    3
    0
    0
    Location:
    Los Angeles Ca
    Vehicle:
    2006 Prius
    Model:
    Two
    Hello everyone
    Recently purchased a 2006 prius w/ 152,000 miles on it. Im currently getting the "red triangle of death." I was told to check the Hybrid battery cells with a multimeter and replace any cell that read below 7.2v. Well after locating and replacing one bad cell that read 6.8 , ive got the battery back into the car successfully however the triangle is still bright red on my dashboard. The codes that pop up are as followed: P0852, C1241, C1310.
    If anyone can help me figure this out I would greatly appreciate it. ;)
     
    #1 HybridNicc, Jun 3, 2018
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,959
    49,072
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    welcome!
    if you plan on keeping the car and diy, i would recommend tech stream software and a subscription to the online service manual.
    the battery needs to be load tested to determine the bad cells.
     
    #2 bisco, Jun 3, 2018
  3. Raytheeagle

    Raytheeagle Senior Member

    Joined:
    Jul 1, 2016
    11,251
    15,477
    0
    Location:
    Bay Area, California
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Plus
    Welcome to Prius Chat (y).

    Some questions:

    • What is the 12 volt battery charge showing after sitting overnight?
    • Have you ever had any issues with the car going into park after pressing the P button?
    • When replacing the module in the battery, did you do any other work while in there like cleaning bus bars?
    • What did you Torque the harness to for the module you replaced?
    Keep us posted (y).
     
    #3 Raytheeagle, Jun 3, 2018
  4. ericbecky

    ericbecky Hybrid Battery Hero

    Joined:
    Mar 12, 2004
    4,365
    3,210
    1
    Location:
    Madison, Wisconsin
    Vehicle:
    2005 Prius
    Model:
    Two
    Check your 12v battery voltage.
    Charge up your 12v battery if needed.

    Did you leave the 12v hooked up when you changed the HV battery?
     
    #4 ericbecky, Jun 3, 2018
  5. dolj

    dolj Senior Member

    Joined:
    May 14, 2012
    7,525
    3,781
    0
    Location:
    Wellington, New Zealand
    Vehicle:
    2007 Prius
    Model:
    N/A
    As well as checking the 12 V battery and charging up as/if required you may have a "P" position switch malfunction.

    DTCs P0851 and P0852 indicate P position switch malfunctions. DTC P0851-579 indicates "short to ground" and P0852-580 indicates "open" or "short to +B".

    The detection condition is:
    DTC No. Detection Item DTC Detection Condition Trouble Area Master Warning Light MIL Memory
    1 P0852-580 Park / Neutral Switch Input Circuit High Open or +B short in P position switch circuit
    • Wire harness or connector
    • P position switch
    • HV control ECU
    		 Comes on - DTC stored


    I have attached the inspection procedure.

    Hope that helps.
     

    Attached Files:

    #5 dolj, Jun 3, 2018
    Last edited: Jun 3, 2018
    SFO and Raytheeagle like this.
  6. HybridNicc

    HybridNicc New Member

    Joined:
    Jun 3, 2018
    3
    0
    0
    Location:
    Los Angeles Ca
    Vehicle:
    2006 Prius
    Model:
    Two
    1. The 12v battery still shows 12v on the multimeter
    2. I have had a problem with the car going into park after hitting the "P" button. The only way im able to get it into park is by simply turning the car off.
    3. I did not do anything else besides remove the HV battery, test the cells, and replace the bad one.
    4. Honestly not sure my friend.
    Thanks for your response
     
    #6 HybridNicc, Jun 4, 2018
  7. HybridNicc

    HybridNicc New Member

    Joined:
    Jun 3, 2018
    3
    0
    0
    Location:
    Los Angeles Ca
    Vehicle:
    2006 Prius
    Model:
    Two
    Thank you so much for this, definitely helpful. Could this be the cause of the red triangle?
     
    #7 HybridNicc, Jun 4, 2018
  8. ericbecky

    ericbecky Hybrid Battery Hero

    Joined:
    Mar 12, 2004
    4,365
    3,210
    1
    Location:
    Madison, Wisconsin
    Vehicle:
    2005 Prius
    Model:
    Two
    Yes.
    Car cannot properly start if 12v battery is too low.
    Then the car throws the red triangle to warn you.
     
    #8 ericbecky, Jun 5, 2018
(You must log in or sign up to post here.)