Barometric pressure sensor

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Perez700r, Feb 27, 2020.

  1. Perez700r

    Perez700r Bobtail Member

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    I’m having a code come up on my truck it’s barometric pressure voltage high flash code 26 any body have any idea what it could be maybe a bad sensor and where exactly is the sensor located it’s on a cat c-13 2005 Peterbilt 378 there seems to be two sensors on the intake manifold but I have no idea if either of those two are it.
     

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  2. spsauerland

    spsauerland Road Train Member

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    Not on intake, threaded into a tee fitting on front gear cover in front of air compressor. Check over wiring well, probably broken wire or rub in harness.
     
    pushbroom, SAR, Rideandrepair and 2 others Thank this.
  3. truckdriver31

    truckdriver31 Road Train Member

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    could be a bad baro sensor or a broken wire. should be little 3 wires. the middle wire should be the ecm return volts. should not ohm out more then 5volts
     
    Last edited: Feb 27, 2020
    Rideandrepair Thanks this.
  4. Perez700r

    Perez700r Bobtail Member

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    So the sensor is on the timing cover somewhere?
     
  5. Perez700r

    Perez700r Bobtail Member

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    Would you happen to have a photo you can post?
     
  6. truckdriver31

    truckdriver31 Road Train Member

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  7. spsauerland

    spsauerland Road Train Member

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  8. Perez700r

    Perez700r Bobtail Member

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    Thank you it appears the sensor is actually missing there’s nothing threaded into that fitting.
     
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