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detroit diesel code 54 help

Discussion in 'Trucks [ Eighteen Wheelers ]' started by truckerbangin, Nov 26, 2015.

  1. Nov 26, 2015 #1
    truckerbangin

    truckerbangin Light Load Member

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    my 1996 kw t600b logged code 54 today and the truck has lost power it struggles to rev to 1500 rpm when it use to rev to 2300rpm. any hep from you detroit guru's will be greatly appriciated.
     
    truckerbangin, Nov 26, 2015
    truckerbangin, Nov 26, 2015
    #1
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  3. Nov 26, 2015 #2
    062

    062 Road Train Member

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    From what I read that's vehicle speed sensor. So check wiring and sensor.
     
    062, Nov 26, 2015
    062, Nov 26, 2015
    #2
    truckerbangin Thanks this.
  4. Nov 26, 2015 #3
    GrapeApe

    GrapeApe Road Train Member

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    54 is a vehicle speed sensor fault. Could be a bad sensor, but more likely a wiring issue. Your engine has gone into anti-tamper mode because it's not getting a speed signal.
     
    GrapeApe, Nov 26, 2015
    GrapeApe, Nov 26, 2015
    #3
    truckerbangin Thanks this.
  5. Nov 27, 2015 #4
    Skate-Board

    Skate-Board Road Train Member

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    Ya, speed sensor. If the computer cannot tell how fast the engine is going it can't set the flow rate for the injectors and that's why it runs rough. It's an easy fix for any shop to do and should be a pretty cheap fix.
     
    Skate-Board, Nov 27, 2015
    Skate-Board, Nov 27, 2015
    #4
    truckerbangin Thanks this.
  7. Nov 27, 2015 #5
    truckerbangin

    truckerbangin Light Load Member

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    changed speed sensor yesterday and it still was derated. came back this am to troubleshoot the issue and truck was back to normal.
     
    truckerbangin, Nov 27, 2015
    truckerbangin, Nov 27, 2015
    #5
  8. Nov 27, 2015 #6
    GrapeApe

    GrapeApe Road Train Member

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    Sounds like you have an intermittent connection. Check for chaffed wires, loose or corroded pins in plugs,
     
    GrapeApe, Nov 27, 2015
    GrapeApe, Nov 27, 2015
    #6
    truckerbangin and Skate-Board Thank this.
  9. Nov 28, 2015 #7
    Skate-Board

    Skate-Board Road Train Member

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    Can you set your engine on high idle to a point where it runs rough? If so, start wiggling the wires and see if the problem comes and goes.
     
    Skate-Board, Nov 28, 2015
    Skate-Board, Nov 28, 2015
    #7
  10. Nov 28, 2015 #8
    Skate-Board

    Skate-Board Road Train Member

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    Also, did you set the depth correct on the sensor?
     
    Skate-Board, Nov 28, 2015
    Skate-Board, Nov 28, 2015
    #8
  11. Nov 30, 2015 #9
    truckerbangin

    truckerbangin Light Load Member

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    Jan 22, 2013
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    yeah i set the depth of the sensor right. truck ran fine all day friday and saturday. i'd like to figure out why my gauges are slow to respond or off
     
    truckerbangin, Nov 30, 2015
    truckerbangin, Nov 30, 2015
    #9
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