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Oil light

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Perez700r, Mar 3, 2020.

Page 1 of 6
  1. Mar 3, 2020 #1
    Perez700r

    Perez700r Bobtail Member

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    I’m having a problem on my 2005 Peterbilt 378 with a cat c-13 the oil light comes on and starts buzzing whenever my rpms are over 1500 but my oil pressure on the gauge is perfect if I drop down below 1500rpms the light and buzzing turn off. Any ideas?
     
    Perez700r, Mar 3, 2020
    Perez700r, Mar 3, 2020
    #1
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  3. Mar 3, 2020 #2
    Perez700r

    Perez700r Bobtail Member

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    Also my oil level is good.
     
    Perez700r, Mar 3, 2020
    Perez700r, Mar 3, 2020
    #2
  4. Mar 3, 2020 #3
    xsetra

    xsetra Road Train Member

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    Aug 21, 2011
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    My guess is bad sensor.
     
    xsetra, Mar 3, 2020
    xsetra, Mar 3, 2020
    #3
    baha Thanks this.
  5. Mar 3, 2020 #4
    Jetinc2016

    Jetinc2016 Bobtail Member

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    Feb 13, 2020
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    Have to say it’s a sensor somewhere
     
    Jetinc2016, Mar 3, 2020
    Jetinc2016, Mar 3, 2020
    #4
  7. Mar 3, 2020 #5
    Perez700r

    Perez700r Bobtail Member

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    Feb 25, 2020
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    So maybe a bad oil pressure sensor?
     
    Perez700r, Mar 3, 2020
    Perez700r, Mar 3, 2020
    #5
  8. Mar 3, 2020 #6
    Dave1837

    Dave1837 Road Train Member

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    Had the same problem with my '06 379 C15, oil pressure sensor was bad
     
    Dave1837, Mar 3, 2020
    Dave1837, Mar 3, 2020
    #6
  9. Mar 3, 2020 #7
    xsetra

    xsetra Road Train Member

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    Yes,if it is original it's 15 years old.
    The other problem could be your pump,BUT you say oil pressure on gauge says good pressure.

    Maybe you can plumb in a gauge you know is accurate to check accuracy of dash gauge and sensor.

    Good luck
     
    xsetra, Mar 3, 2020
    xsetra, Mar 3, 2020
    #7
  10. Mar 3, 2020 #8
    Perez700r

    Perez700r Bobtail Member

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    Feb 25, 2020
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    I’ll change the sensor out hopefully that fixes it when I change it is oil gonna come pouring out of the sensor hole?
     
    Perez700r, Mar 3, 2020
    Perez700r, Mar 3, 2020
    #8
  11. Mar 3, 2020 #9
    xsetra

    xsetra Road Train Member

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    No, the oil should be in the pan, with truck turned off.
     
    xsetra, Mar 3, 2020
    xsetra, Mar 3, 2020
    #9
  12. Mar 3, 2020 #10
    xsetra

    xsetra Road Train Member

    5,195
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    Aug 21, 2011
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    Here's a thread with some information.
    Peterbilt forum

    oil pressure C13 Accert help needed
     
    xsetra, Mar 3, 2020
    xsetra, Mar 3, 2020
    #10
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