Error code b1412 ambient temperature sensor circut

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Tariq86, Dec 18, 2015.

  1. Tariq86

    Tariq86 Junior Member

    Joined:
    Dec 18, 2015
    10
    0
    0
    Location:
    Jordan
    Vehicle:
    2011 Prius
    Model:
    Three
    Hello all

    My Prius 2010 outer temperature displays dashes, like this --
    Is the problem with the sensor? and has anyone had such a problem?

    Thank you
     
    #1 Tariq86, Dec 18, 2015
  2. David Beale

    David Beale Senior Member

    Joined:
    Jul 24, 2006
    5,963
    1,987
    0
    Location:
    Edmonton Alberta
    Vehicle:
    2012 Prius
    Easy to visually check the sensor. It's attached to the vertical bar under the hood latch behind the lower grill. Check the cable and connector.
     
    #2 David Beale, Dec 18, 2015
    Tariq86 likes this.
  3. Tariq86

    Tariq86 Junior Member

    Joined:
    Dec 18, 2015
    10
    0
    0
    Location:
    Jordan
    Vehicle:
    2011 Prius
    Model:
    Three
    Thank you for your quick reply and explanation. I will and hopefully it works.

    One last thing please, Can I reach the sensor or do I have to remove the front bumper?
     
    #3 Tariq86, Dec 18, 2015
  4. David Beale

    David Beale Senior Member

    Joined:
    Jul 24, 2006
    5,963
    1,987
    0
    Location:
    Edmonton Alberta
    Vehicle:
    2012 Prius
    If you have skinny hands/arms, maybe. But front grill removal is probably the norm. Log into the US Toyota site and pay the small fee to allow you to download the service manual. It should list the required procedure in its many pages.
     
    #4 David Beale, Dec 18, 2015
    Tariq86 likes this.
  5. jdcollins5

    jdcollins5 Senior Member

    Joined:
    Aug 30, 2009
    5,131
    1,342
    0
    Location:
    Wilmington, NC
    Vehicle:
    2010 Prius
    Model:
    III
    There is a plastic cover over the top of the radiator. Just remove this cover and you can see and get to the sensor.
     
    #5 jdcollins5, Dec 18, 2015
    Tariq86 likes this.
  6. Tariq86

    Tariq86 Junior Member

    Joined:
    Dec 18, 2015
    10
    0
    0
    Location:
    Jordan
    Vehicle:
    2011 Prius
    Model:
    Three
    Great! Thank you, brother David Beale. That was so helpful.
     
    #6 Tariq86, Dec 18, 2015
  7. Tariq86

    Tariq86 Junior Member

    Joined:
    Dec 18, 2015
    10
    0
    0
    Location:
    Jordan
    Vehicle:
    2011 Prius
    Model:
    Three
    Thank you for this info. So easy
     
    #7 Tariq86, Dec 18, 2015
  8. David Beale

    David Beale Senior Member

    Joined:
    Jul 24, 2006
    5,963
    1,987
    0
    Location:
    Edmonton Alberta
    Vehicle:
    2012 Prius
    Well, it's still very tight. I installed aluminum mesh behind the upper and lower grill. I did remove the plastic cover. I could not get my arms down more than about 15 cm. I'm a pretty big guy, with strong forearms, so that probably had a big effect. But give it a try. No cost to try. I found it very difficult to access from below, so from above is the way.
     
    #8 David Beale, Dec 18, 2015
    Tariq86 likes this.
  9. Tariq86

    Tariq86 Junior Member

    Joined:
    Dec 18, 2015
    10
    0
    0
    Location:
    Jordan
    Vehicle:
    2011 Prius
    Model:
    Three
    I'm a skinny mini, so I will give it a try for sure.
    I appreciate your help. Thank you again
     
    #9 Tariq86, Dec 18, 2015
(You must log in or sign up to post here.)