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2008 isx crankcase pressure code.

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Grainfarmer, Nov 9, 2018.

Page 1 of 2
  1. Nov 9, 2018 #1
    Grainfarmer

    Grainfarmer Bobtail Member

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    Apr 25, 2017
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    Hey guys, I have been getting a crank case pressure code coming up, changed the sensor and checked out the plug seems to be ok. Anyone have any other ideas it might be? The motor was rebuilt and has about 400 hours on it.
     
    Grainfarmer, Nov 9, 2018
    Grainfarmer, Nov 9, 2018
    #1
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  3. Nov 9, 2018 #2
    AModelCat

    AModelCat Road Train Member

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    Canuckistan
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    Make sure the crankcase vent isn't plugging up. This time of year with lower temperatures they can freeze up.
     
    AModelCat, Nov 9, 2018
    AModelCat, Nov 9, 2018
    #2
  4. Nov 9, 2018 #3
    Grainfarmer

    Grainfarmer Bobtail Member

    46
    8
    Apr 25, 2017
    0
    I have pulled it out and it still threw the crank code
     
    Grainfarmer, Nov 9, 2018
    Grainfarmer, Nov 9, 2018
    #3
  5. Nov 9, 2018 #4
    Goodysnap

    Goodysnap Road Train Member

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    Pull test the wires just behind the plug/ connector @ the sensor. The copper can break inside the insulation due to engine vibration. Also check for wire rubs around the steel P clips around the front cover LH lower.
     
    Goodysnap, Nov 9, 2018
    Goodysnap, Nov 9, 2018
    #4
    pushbroom and AModelCat Thank this.
  7. Nov 9, 2018 #5
    dumptruck89

    dumptruck89 Light Load Member

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    Feb 27, 2015
    MA
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    Does it have a crank case filter like the newer isx's, a squarish looking flat thing on the driver side of the motor? I know on the 2012 and 2013 we had at my old job both needed filters when the code popped up
     
    dumptruck89, Nov 9, 2018
    dumptruck89, Nov 9, 2018
    #5
  8. Nov 9, 2018 #6
    Grainfarmer

    Grainfarmer Bobtail Member

    46
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    Apr 25, 2017
    0
    Ok thanks I'll give that a try, I hope it's not like a spung ring or something
     
    Grainfarmer, Nov 9, 2018
    Grainfarmer, Nov 9, 2018
    #6
    Goodysnap Thanks this.
  9. Nov 9, 2018 #7
    Heavyd

    Heavyd Road Train Member

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    What is the actual code?
     
    Heavyd, Nov 9, 2018
    Heavyd, Nov 9, 2018
    #7
  10. Nov 9, 2018 #8
    Grainfarmer

    Grainfarmer Bobtail Member

    46
    8
    Apr 25, 2017
    0
    Its crank case pressure sensor high voltage.
     
    Grainfarmer, Nov 9, 2018
    Grainfarmer, Nov 9, 2018
    #8
  11. Nov 9, 2018 #9
    Heavyd

    Heavyd Road Train Member

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    Signal voltage out of range high would be a bad sensor or shorted wiring to another power source. Since you already changed the sensor, you are looking at a short in the harness somewhere.
     
    Heavyd, Nov 9, 2018
    Heavyd, Nov 9, 2018
    #9
  12. Nov 9, 2018 #10
    Grainfarmer

    Grainfarmer Bobtail Member

    46
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    Apr 25, 2017
    0
    Ok thank you sir!
     
    Grainfarmer, Nov 9, 2018
    Grainfarmer, Nov 9, 2018
    #10
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