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Pete CAT AcertC7 On board Fault Code 25

Discussion in 'Trucks [ Eighteen Wheelers ]' started by jlittle0018, Jan 4, 2016.

  1. Jan 4, 2016 #1
    jlittle0018

    jlittle0018 Bobtail Member

    18
    0
    Oct 13, 2015
    0
    Acert C7.
    Got all my codes/logged events cleared off today. My problem has came down to the 25 code. However, the check engine light is not staying on all the time, just at certain times when the loss of power occurs. Would this code be logged into ET as logged event instead of active code since the light isn't staying on?

    Anyone had any experiences with this code?
     
    jlittle0018, Jan 4, 2016
    jlittle0018, Jan 4, 2016
    #1
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  3. Jan 5, 2016 #2
    GrapeApe

    GrapeApe Road Train Member

    2,215
    2,211
    Jan 7, 2013
    0
    25 has to do with the boost pressure sensor. Wiring/bad connection, or a faulty sensor is the most likely cause. It would be in ET as a logged fault code if it is not active at the time you check.
     
    GrapeApe, Jan 5, 2016
    GrapeApe, Jan 5, 2016
    #2
    jlittle0018 Thanks this.
  4. Jan 5, 2016 #3
    jlittle0018

    jlittle0018 Bobtail Member

    18
    0
    Oct 13, 2015
    0
    Got a sensor ordered. Thanks!
     
    jlittle0018, Jan 5, 2016
    jlittle0018, Jan 5, 2016
    #3
  5. Jan 5, 2016 #4
    GrapeApe

    GrapeApe Road Train Member

    2,215
    2,211
    Jan 7, 2013
    0
    I'm not saying that it's the senor, I've seen more wiring/corrosion issues than bad sensors. Make sure you check the wiring before you spend money, Cat sensors are not cheap.
     
    GrapeApe, Jan 5, 2016
    GrapeApe, Jan 5, 2016
    #4
  7. Jan 5, 2016 #5
    jlittle0018

    jlittle0018 Bobtail Member

    18
    0
    Oct 13, 2015
    0
    We checked the wiring today. Everything seems to be in good shape.
     
    jlittle0018, Jan 5, 2016
    jlittle0018, Jan 5, 2016
    #5
  8. Jan 31, 2022 #6
    Creswell81

    Creswell81 Bobtail Member

    41
    54
    Apr 7, 2020
    North Carolina
    0
    I have a 2003 peterbilt 379 with a c15. The check engine light comes on in the last 4 gears when it's about time to shift gears and when I shift to the next gear it blinks 2 times and goes out. Only seam to do this under a load.
    Any idea what the prob is
    Also the flash code is 25 when I check the codes.
     
    Creswell81, Jan 31, 2022
    Creswell81, Jan 31, 2022
    #6
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