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High oil pressure sensor

Discussion in 'Trucks [ Eighteen Wheelers ]' started by mpower1, Feb 20, 2019.

  1. Feb 20, 2019 #1
    mpower1

    mpower1 Bobtail Member

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    Feb 20, 2019
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    I have a 2007 Freightliner Columbia. Dashboard gauge shows high oil pressure. I replaced oil pressure sensor and engine harness and gauge is still showing as high oil pressure. Not sure where to go from here. Any suggestions? Thanks
     
    mpower1, Feb 20, 2019
    mpower1, Feb 20, 2019
    #1
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  3. Feb 21, 2019 #2
    lester

    lester Midwest's #1 Feed Hauler

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    Engine? And what do you consider high pressure? Did it start suddenly or a gradual change? Either way I'd probably start with putting a mechanical gauge in the port the oil pressure sensor is screwed into the engine
     
    lester, Feb 21, 2019
    lester, Feb 21, 2019
    #2
    ibcalm19 Thanks this.
  4. Feb 23, 2019 #3
    mpower1

    mpower1 Bobtail Member

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    MBE4000
    High oil pressure over 100 and it was a sudden change
    I replaced the oil pressure sensor, engine harness, unplugged oil gauge and still getting the same issues.
     
    mpower1, Feb 23, 2019
    mpower1, Feb 23, 2019
    #3
  5. Feb 23, 2019 #4
    HopeOverMope

    HopeOverMope Road Train Member

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    You might be able to do some pin to pin test on the ECM from the pin that is the oil pressure power and return to all other pins, and check for out of range ohm readings. Can also check the ECM pin for 5v/12v at the oil pressure signal to make sure the power is getting sent.

    ECM could be causing it, or maybe really clean your grounds up at the starter, frame rail and etc
     
    Last edited: Feb 23, 2019
    HopeOverMope, Feb 23, 2019
    HopeOverMope, Feb 23, 2019
    #4
  7. Feb 23, 2019 #5
    Animosus

    Animosus Heavy Load Member

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    Check oil pressure with a mechanical gauge, figure out if it is a mechanical or electrical issue.
     
    Animosus, Feb 23, 2019
    Animosus, Feb 23, 2019
    #5
    lester and HopeOverMope Thank this.
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