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International Boost Control Solenoid Open Circuit

Discussion in 'International Forum' started by qmckay, Aug 26, 2019.

  1. Aug 26, 2019 #1
    qmckay

    qmckay Bobtail Member

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    I have a 2010 International Prostar+ with the fault codes fault code 1256, spn 7312, fmi 5 . It has low power up hills but check engine light is not on. Can someone help me please. Thanks
     
    qmckay, Aug 26, 2019
    qmckay, Aug 26, 2019
    #1
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  3. Aug 26, 2019 #2
    cncking2000

    cncking2000 Light Load Member

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    Without a functioning boost controller, the engine will not be able to build enough turbo pressure to make hills manageable.

    With an open circuit fault, either the solenoid itself has failed, or the wiring to the solenoid has become severed.

    May be as easy as identifying the boost control solenoid and reseating (unplug, and reconnect) the connector to the sensor.

    May have a broken wire in the harness on the other hand..
     
    cncking2000, Aug 26, 2019
    cncking2000, Aug 26, 2019
    #2
  4. Aug 26, 2019 #3
    HillbillyDeluxeTruck

    HillbillyDeluxeTruck Road Train Member

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    You might wanna start by telling us what engine, but Im already suspecting its the Junkforce.
     
    HillbillyDeluxeTruck, Aug 26, 2019
    HillbillyDeluxeTruck, Aug 26, 2019
    #3
    Heavyd Thanks this.
  5. Aug 30, 2019 #4
    qmckay

    qmckay Bobtail Member

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    You suspected right
     
    qmckay, Aug 30, 2019
    qmckay, Aug 30, 2019
    #4
  7. Aug 30, 2019 #5
    qmckay

    qmckay Bobtail Member

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    You know what the problem is ?
     
    qmckay, Aug 30, 2019
    qmckay, Aug 30, 2019
    #5
  8. Aug 31, 2019 #6
    Heavyd

    Heavyd Road Train Member

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    Either you have a bad boost control solenoid, or wiring to it. If you unplug it and insert a paperclip into the harness connector to short the pins, the code should change to 1257 for a shorted circuit to show the wiring is ok. Then you know the valve is bad.
     
    Heavyd, Aug 31, 2019
    Heavyd, Aug 31, 2019
    #6
    AModelCat Thanks this.
  9. Sep 2, 2019 #7
    qmckay

    qmckay Bobtail Member

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    If it is a bad boost control solenoid , how much do you think it will cost to have it fixed ? Just trying to get an idea because it sounds like you know what you are talking about
     
    qmckay, Sep 2, 2019
    qmckay, Sep 2, 2019
    #7
  10. Sep 2, 2019 #8
    Heavyd

    Heavyd Road Train Member

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    The valve itself is easy and quick to change. I don't know the price of it.
     
    Heavyd, Sep 2, 2019
    Heavyd, Sep 2, 2019
    #8
    qmckay Thanks this.
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